To provide easy access to, and manipulation of, a data set. The following example defines an array of Tuple objects that contain the names of students and their corresponding test scores. Ratio is still 0.15 (struct record, same as struct without record, like yours) vs 1.2 (default record). For, example, by prefixing an object literal with a number sign (#), we create a record – a compound value that is compared by value and immutable: If we prefix an Array literal with #, we create a tuple – an Array that is compared by value and immutable: Compound values that are compared by value are called compound primitive values or compound primitives. Listing 3-2 depicts a tuple struct A record is a data structure that groups together related items of data. Additionally, crypticness is much less of an issue because we get used to the syntax. Some data structures such as hash maps and search trees have slots in which keys are placed according to their values. Elements must be primitives (including records and tuples). Youcan extract a field from a record by using #id expr where exp isthe record and id is the field that you want to extract. Using a tuple struct makes sense when you want to associate a name with a tuple or distinguish it from To have a tuple with more than seven elements, you can use the 8 th element, TRest, to created nesting tuple objects. filter_none. To create an instance of a tuple struct, you only need to state the name of the struct and The main difference between tuples and list is that tuples are immutable i.e. the record's name is used to indicate that the function expects two Vector2 instances as function As grandes entrevistas, a melhor opinião e os conteúdos multimédia sobre futebol e todas as modalidades desportivas. To provide easy access to, and manipulation of, a data set. Creating Tuples. If the value of key changes, it generally has to be put in a different slot. To access a record's fields, we use the dot notation: vector.x. Listing 3-5: Creating a Vector2 instance using the field init shorthand syntax. Unlike a tuple, a record is explicitly defined as its own type using the type keyword, and record fields are defined as a semicolon-separated list. Here is one example: The type of a record with labels l1, l2,..., ln, and associated types t1, t2,..., tn is written as {l1:t1,l2:t2, ..., ln:tn};the order of fields does not count, e.g. For more complex structures records are a better fit than tuples. TUPLE in DBMS. .NET framework supports tuples with up to seven elements. In Python, a tuple is similar to List except that the objects in tuple are immutable which means we cannot change the elements of a tuple once assigned. are defined using the struct keyword and a name, as shown in Listing 3-8. The “name” of the tuple type is determined by the combination of types that are multiplied together. With immutable values, sharing is not a problem. We can see that records and tuples are primitives when we use typeof: Caveat: These conversions are shallow. definition specifies both the name and type of each piece of data, allowing you to retrieve the Tuples are used to store multiple items in a single variable. Relation instance − A finite set of tuples in the relational database system represents relation instance. To provide easy access to, and manipulation of, a data set. The order of the multiplication is important. A record has fields, and these are named. In contrast, tuple struct definitions omit field names; only specifying the field types. A tuple allows us to group related information and use it as a single entity. play_arrow. There is only one 0-tuple, referred to as the empty tuple. The keys Future: classes whose instances are compared by value? Value Tuple is a newly introduced type in C# 7.0 to hold finite data in a record manner. A Tuple is a collection of Python objects separated by commas. RDBMS: What is a Tuple? Listing 3-6: Using Vector2 instances' fields to calculate their addition. We can see that here: The upside is that this syntax is concise. But which one do you choose when you need to store a collection? the type {l1:t1,l2:t2} is the same as the type {l2:t2,l1:t1}. have to correspond to the field names in the struct definition, but can be provided in any order. The following example defines an array of Tuple objects that contain the names of students and their corresponding test scores. The information in a database can be thought of as a spreadsheet, with columns (known as fields or attributes) … (In many ways, a record can be thought of as a simple class.) We already have Tuples in C# which is used to store multiple values, but As nouns the difference between row and tuple is that row is a line of objects, often regularly spaced, such as seats in a theatre, vegetable plants in a garden etc or row can be (weightlifting) an exercise performed with a pulling motion of the arms towards the back or row can be a noisy argument while tuple is (set theory) a finite sequence of terms. ... As an example of incorrect terms in T-SQL, people often use the terms “field” and “record” to refer to what T-SQL calls “column” and “row,” respectively. Here, we declared and assigned two variables to id and name of an employee. 5-Tuple: A 5-tuple refers to a set of five different values that comprise a Transmission Control Protocol/Internet Protocol (TCP/IP) connection. So int*string is not the same tuple type as string*int. That’s why, in JavaScript, values that can be used as keys, are either: Deeply comparing objects – which is a built-in operation and can be invoked, e.g., via ===. struct and then add curly braces containing key: value pairs for each of its fields. Records. In contrast, list has an extra layer of indirection to an external array of pointers. Inside the curly braces is a list of label: type pairs, separated by semicolons (remember, all lists in F# use semicolon separators – commas are for tuples).. Let’s compare the “type syntax” for a record type with a tuple type: In the context of relational databases, a tuple is one record (one row). The tuple provides a quick way of grouping and arranging data. One downside of the new syntax is that the character # is already used elsewhere (for private fields) and that non-alphanumeric characters are always slightly cryptic. Our focus here is the difference between Python lists and tuples. You can select the n th data element from a tuple using the #n operator: #2 (1, "two", 3.0) = "two". A record type is exactly that, a tuple where each element is labeled. Values must be primitives (including records and tuples). The differences between tuples and lists are, the tuples cannot be changed unlike lists and tuples use parentheses, whereas lists use square brackets. Tuples. other tuples' types, but naming each field would be redundant. In someways a tuple is similar to a list in terms of indexing, nested objects and repetition but a tuple is immutable unlike lists which are mutable. Probably creating a class with __init__ is what most people would do. 2. Per the proposal, records and tuples are deeply immutable versions of objects and arrays, respectively. Records consist of key-value pairs, which makes them similar similar to objects in JavaScript. A tuple is a collection of objects which ordered and immutable. Mun supports two types of structures: record structs and tuple structs. Tuple types cannot be given explicit names. def concatenateTuple(args: Tuple2[String, String]): String = args._1 + args._2 and the third is to take a function that returns a partially applied function. Tuple: A tuple is an ordered and an immutable data type which means we cannot change its values and tuples are written in round brackets. The data could be of any primitive type also it maintains the sequence of data internally. Why are values that are compared by value immutable in JavaScript? Examples: Sets and Maps become more useful, Processing objects with compound property values. With this low overhead, it's actually quite quick to make a new tuple. Records and tuples are primitives # We can see that records and tuples are primitives when we use typeof: > typeof #{x: 1, y: 4} 'record' > typeof #['a', 'b'] 'tuple' Restrictions of what can be inside records and tuples # Records: Keys must be strings. Tuple types cannot be given explicit names. Sharing values: If an object is mutable, we need to deeply copy it if we want to share it safely. Whenever we work with cached data (such previousData in the following example), the built-in deep equality lets us check efficiently if anything has changed. In the previous blog posts you learned about different C# 9.0 features: Top-level statements; Init-only properties; In this blog post, let’s look at another very interesting feature of C# 9.0 that is called record types or just records.. values are not linked to field names, they have to appear in the order specified by the struct Photo Hitesh Choudhary on Unsplash. to retrieve and to assign a value to the record's field, as shown in Listing 3-6. Forinstance, applying #… When defining an array in TypeScript you might think it is okay to define it using [string].I have made this mistake & I find others making it often as well. A fairly simple preprocessor can handle this by generating a public class/struct/record named Tuple_x_CHAR_y_INT, where the attribute names are in alphabetical order, and then changing all references to TUPLE types to refer to these classes. Becauseperson isa4-tuple,Ineedapatternthatlookslike4thingsinsideparensseparatedbycommas. Records and Labeled Tuples: Example: Example - Phone numbers: UML: Example - pairs: Example - LISP functions: Example - triples: Triples and Pairs: Sets of Tuples: Example - a set of tuples: Short form: Long Form: Example - CIRCLE: Either-Or: Inheritance: Specifying Unique … If I ask you to create a Python class for the transaction record within 10 seconds, how would you do that? Tuples are compiled into objects of one of several generic types, all named System.Tuple, that are overloaded on the arity, or number of type parameters. Tuple − A single row of a table, which contains a single record for that relation is called a tuple. A record struct For that reason, I’m hoping that we’ll eventually get classes whose instances are immutable and compared by value. During execution, creating a tuple is faster than creating a list. Ask Question ... the second is to take a single argument that is a tuple or record, e.g. Tuples look like any other instance with members, and you can create and interact with tuples as needed, even passing them to functions that accept tuple arguments. In essence, records were designed to have an object-like structure, while tuples are array-like in structure. A record struct definition specifies both the name and type of each piece of data, allowing you to retrieve the field by name. Thus, removing the need to declare two different variables. Attributes can be either simple or composite and single or multi-valued . In mathematics, a tuple is a finite ordered list (sequence) of elements. Attributes can be either simple or composite and single or multi-valued . To answer this question, we first get a little deeper into the two constructs and then we will study comparison between python tuples vs lists. The Tuple class was introduced in .NET Framework 4.0. The same thing can be achieved by using a single tuple type variable. This gives tuples speed advantage for indexed lookups and unpacking. On the other hand, we can change the elements of a list. arguments and returns a Vector2 instance as result. The following are the main characteristics of a Tuple: Tuples are immutable and can store any type of data type. Thanks to Daniel Ehrenberg and Rob Palmer for reviewing this blog post. As a verb row Tuple is one of 4 built-in data types in Python used to store collections of data, the other 3 are List, Set, and Dictionary, all with different qualities and usage.. A tuple is a collection which is ordered and … If I ask you to create a Python class for the transaction record within 10 seconds, how would you do that? The comma is the critical symbol that defines tuples, not the parentheses. 1. Both are heterogeneous collections of python objects. We can access tuple by referring to the index number inside the square brackets. I'd say that a record hints toward the basic fetchable data unit for storage, and a row hints at a part of a report (often generated from records). This proposal adds two kinds of compound primitive values to JavaScript: At the moment, JavaScript only compares primitive values such as strings by value (by looking at their contents): In contrast, objects are compared by identity (each object has a unique identity and is only strictly equal to itself): The proposal Record & Tuple (by Robin Ricard and Rick Button) lets us create compound values that are compared by value. That led me down the path of looking at how memory is allocated for tuples vs lists. A record (or tuple) is logically like an "and". Creating a tuple is as simple as putting different comma-separated values. As a verb row Here are the TLDR common methods of defining arrays in TypeScript. Conceivably, multiple records … They are created using the literal syntax of two surrounding curly braces and they can be described further using a type alias. For example, a tuple can represent a record in a database, and its components can represent that record's fields. Non-destructive updates of data: We can safely reuse parts of a compound value when we create a modified copy of it (due to everything being immutable). ECMAScript proposal for the Record and Tuple value types. The elements of a list are mutable whereas the elements of a tuple are immutable. A group of fields is known as a record or tuple. The dot notation can be used both Fields and records are physical. vector. RÉCORD es la página deportiva más influyente de México, encontrarás: Futbol, Liga MX, Estadísticas, Selección Mexicana, Deportes, Tendencias y más. While tuples are an ordered collection of data values, a tuple is an unordered collection of labeled data values. struct Vector2 { x: f32 , y: f32 , } For example, Listing 3-1 shows a record struct that stores a 2-dimensional An attribute in the database terms is called as fields. That’s important if a construct is used often and we want to avoid verbosity. A tuple struct doesn't have field names, but instead accesses fields using indices - starting Structure Creation When tuples are created in memory, Python blocks off a chunk of the memory and assigns relatively little overhead to the memory since the contents of a tuple are immutable. Using data structures such as Maps and Sets: They become more powerful because two compound primitives with the same content are considered strictly equal everywhere in the language (including keys of Maps and elements of Sets). Therefore, record expressions are not understood by the shell unless special actions are taken. 1 Records 1.1 Records vs Tuples. Using the standalone function with dot notation 3. It can help you combine any number of elements into a single unit. These so-called unit structs A single entry in a table is called a Tuple or Record or Row.A tuple in a table represents a set of related data. Among others, the following people replied to. int * float * string Interoperation with C# Tuples. A record has fields, and these are named. 1. Probably creating a class with __init__ is what most people would do. Chapter “The problems of shared mutable state and how to avoid them”, Records, immutable compared-by-value versions of plain objects, Tuples, immutable compared-by-value versions of Arrays. Was there any improvement for reference type? So int*string is not the same tuple type as string*int. Python Lists vs Tuples. A website record is created by specifying the record's fields as follows: Tuple versioning is easier to support overall. As nouns the difference between row and tuple is that row is a line of objects, often regularly spaced, such as seats in a theatre, vegetable plants in a garden etc or row can be (weightlifting) an exercise performed with a pulling motion of the arms towards the back or row can be a noisy argument while tuple is (set theory) a finite sequence of terms. Tuple types appear in this form when you view them from another language, such as C# or Visual Basic, or when you are using a … Records are similar to tuples, in that they group together various data elements. Each row in a table represents a set of related data, and every row … Sometimes it can be useful to define a struct without any fields. we cannot modify a tuple’s content but List is mutable data structure. A record type has the standard preamble: type [typename] = followed by curly braces. Photo Hitesh Choudhary on Unsplash. In DBMS the word record use in chapter describes how database tables stores on disk blocks. The main advantage of using records instead of tuples is that fields in a record are accessed by name, whereas fields in a tuple are accessed by position. Records are also relevant when describing a "fetchable" part of linear media, such as magnetic tapes. Instead of special literal syntax, we could have used factory functions: This syntax could be improved if JavaScript supported Tagged Collection Literals (a proposal by Kat Marchán that she has withdrawn): Alas, even if we use shorter names, the result is still visually cluttered: Instead of plain objects or Arrays, I like to use classes that are often just data containers because they attach names to objects. Type is a definition of a type of data, for example, a union, primitive, intersection, tuple, or any other type. NB: I tried it using last F# 4.1 feature to tag record with []. They can help us representing information in the form of records such as the employee record. With compound primitives, we can eliminate duplicates even though they are compound (and not atomic, like primitive values): As objects are compared by identity, it rarely makes sense to use them as keys in (non-weak) Maps: This is different if we use compound primitives: The Map in line A maps addresses (Records) to names. Each row in a table represents a set of related … As últimas notícias, reportagens, entrevistas, artigos desportivos, no Jornal Record. Datatypes, in the most general form, are used for defining "or" types -- when something needs to be one type or another. link brightness_4 code # An empty tuple . Tuples are sequences, just like lists. For example, a tuple can represent a record in a database, and its components can represent that record's fields. It also instruments the DOM to record the HTML and CSS on the page, recreating pixel-perfect videos of even the most complex single-page apps. Compared by value and immutable (primitives), Compared by identity and potentially mutable (objects). The code snippet in Listing 3 creates a tuple with a nested tuple inside it. Relation instances do not have duplicate tuples. The comma is the critical symbol that defines tuples, not the parentheses. Is it a row or a record (or a tuple) Ask Question Asked 7 years, 2 months ago. employee is the tuple type variable with two values of number and string type. So, let’s start Python Tuples vs Lists Tutorial. Active 7 years, 2 months ago. C# - Tuple. Instead of having to repeat the x and y field names, the field init shorthand syntax | Stage 2: it will change! These are slightly more complex than arrays as you can store more than one type of data together. An n-tuple is defined inductively using the construction of an ordered pair. C# 7.0已经出来一段时间了，大家都知道新特性里面有个对元组的优化：ValueTuple。这里利用详尽的例子详解Tuple VS ValueTuple（元组类VS值元组），10分钟让你更了解Valu For instance, a tuple of type int * float * string is an object that contains an int and a float and a string. - tc39/proposal-record-tuple In the context of a relational database, a row—also called a tuple—represents a single, implicitly structured data item in a table. In the literature available to me, the term "tuple" is Values of a record can be accessed by means of these techniques: 1. Tuple is similar to List in python language, both are sequential, index based data structure. Directly with the dot syntax (similar as in JavaScript) 2. Most testing frameworks support deep equality to check if a computation produces the expected result. from zero - corresponding to a field's position within the struct definition (see Listing 3-7). In the context of a relational database, a row—also called a tuple—represents a single, implicitly structured data item in a table. A tuple is an assortment of data, separated by commas, which makes it similar to the Python list, but a tuple is fundamentally different in that a tuple … For example, a tuple can represent a database record, and its components can represent individual fields of the record. Destructuring When using destructuring it is required to na… In simple terms, a database table can be thought of as consisting of rows and columns. Following is an example of single record or tuple. An attribute in the database terms is called as fields. I would saw a tuple is a row (record) in a table in the database / tablespace. that stores a 3-dimensional vector. Row vs. tuple; Peter Eisentraut. For example, the above Employee table has 4 tuples/records/rows.. Listing 3-2: A tuple struct definition for a 3D vector. It has named fields and is similar to a struct in C. Record expressions are translated to tuple expressions during compilation. Whiletuples are an ordered collection of data values, a tuple is an unorderedcollection of labeled data values. Records are similar to tuples in that they are data structures for holdingmultiple values. It includes a source IP address/port number, destination IP address/port number and the protocol in use. In DBMS a record-oriented file-system is a file system where files are stored as collections of records. A tuple is a data structure that contains a sequence of elements of different data types. Listing 3-1: A record struct definition for a 2D vector. For example, the built-in Node.js module assert has the function deepEqual(). For example, Listing 3-1 shows a record struct that stores a 2-dimensional vector. This choice of terms is puzzling me; where does it come from? In this blog post, we take a first look at the ECMAScript proposal “Record & Tuple” (by Robin Ricard and Rick Button). field by name. In simple terms, a database table can be thought of as consisting of rows and columns. In the following example, we use the Array method .filter() (line B) to extract all entries whose address is equal to address (line A). specify a comma-separated list of values between round brackets - as shown in Listing 3-4. Record is the basic unit in storage system that have implicit meaning. Each tuple represents a complete record of the specific data item, each tuple stores different data with the same structure. Tuple. Listing 3-7: Using Vector3 instances' fields to calculate their addition. edit close. With struct record, you got the benefit of the two worlds. Multiple arguments vs a tuple argument. It often makes sense to name function variables the same as the fields of a record struct. In this article, I want to share two alternatives in Python to construct a class: Named Tuple and Dataclass.In the end, I will compare the performance of these 3 options and give … It is relatively simple to reproduce the functionality of SQL Server's temporal tables by using triggers. Values must be primitives (including records and tuples). C# 7.0 introduced tuples to the language. , 2 months ago the transaction record within 10 seconds, how would you that... Are also relevant when describing a `` fetchable '' part of linear media, such as magnetic.. List ( sequence ) of n elements, where n is a collection of Python objects separated by commas key-value..., how would you do that the fields of a record struct definition items in a record struct definition a... Struct keyword and a name, Address, Phone } s important a. Contains columns and rows in which keys are placed according to their values )... Rows in which rows stand for attributes form of records a struct in C. record expressions translated. For attributes the critical symbol that defines tuples, not the same tuple type is determined by combination. Which one do you choose when you need to deeply copy it if we want share... Tuple structs record ( or a tuple is an unorderedcollection of labeled values easy access to, and equivalent... Instance of our Vector2, as shown in listing 3-3 with four fields named first,,. Type also it maintains the sequence of elements to a set of five different values that are compared value... Is what most people would do the sequence of data together many,... Form { x1=e1,..., xn=en } where the identifiers x labels! Mutable, we need to deeply copy it if we also had support for deeply and updating! Me ; where does it come from variables to id and name of an issue we!, records and tuples of elements here is the tuple type variable a. To reproduce the functionality of SQL Server 's temporal tables by using triggers let... Struct tuples in the struct definition co-mingled in one table 0.15 ( record. Table ; it is also called a tuple is an example of single record or Row.A tuple in a that! Applying # … in mathematics, a tuple allows us to group information. A computation produces the expected result mutable whereas the elements of a.... Structures for holdingmultiple values which makes them similar similar to tuples in that they group various... While columns stand for attributes depicts a tuple or record or tuple classes. Must be primitives ( including records and tuples data internally list has an extra of. Items of data internally an ordered collection of data together single, implicitly structured data item, tuple... One row ) shown in listing 3-3 to calculate their addition important if a produces! By using triggers history table eliminates a lot of the complexities arising from having history and live values in... How would you do that structs, and custom logs row of record. Class with __init__ is what most people would do ordered and immutable ’ ll eventually get whose... Ordered and immutable ( primitives ), compared by value type classes ( in many,. Allowing you to create a Python class for the transaction record within 10 seconds how! Default record ) in a table represents a complete record of the tuple < T > class introduced... A newly introduced type in C # 7.0 to hold finite data in a table which... That reason, I ’ m hoping that we ’ ll eventually get whose! In F # function deepEqual ( ) IP address/port number and the Protocol in use snippet in listing.! String * int tuples vs lists Tutorial tuple is as simple as putting comma-separated... Would saw a tuple object but which one do you choose when you need to deeply copy if. Structures records are similar to objects are incorporated directly in a different slot with four fields first. In TypeScript for tuple vs record lookups and unpacking property values linear media, such as the fields of a has! There is only one 0-tuple, referred to as the empty tuple similarities. Tuple is an example of single record for that reason, I ’ m hoping that want! Of grouping and arranging data ] = followed by curly braces f32, } more! It includes a source IP address/port number and string type 3-7: using Vector3 instances ' fields to their! Can not modify a tuple is, therefore, a record can be either simple composite... You got the benefit of the form { x1=e1,..., xn=en tuple vs record where the identifiers x labels. Relation instance objects are incorporated directly in a database table can be inside records and tuples ) both the and. Having history and live values co-mingled in one table an attribute in context... Quick way of grouping and arranging data support for deeply and non-destructively updating data that contains sequence! Is a newly introduced type in C # 7.0 to hold finite data in a record... A single entity list in Python language, both are sequential, index based structure! Are not understood by the combination of types that are multiplied together the elements of a.! Objects in JavaScript you combine any number of elements of a tuple is a finite ordered list ( sequence of... Compound property values you choose when you need to store a collection of objects which ordered and (! Be thought of as a single unit has rows and columns, rows. Mutable ( objects ) combine any number of elements ; only specifying field... Type in C # are structs, and are equivalent to struct tuples in that they are from... Includes a source IP address/port number and string type to group related information and use it as record! Single argument that is a sequence ( or tuple ) ask Question 7... Called as fields or tuple: I tried it using tuple vs record F # feature. Which keys are placed according to their values one type of data internally database., we need to declare two different variables ) ask Question Asked 7 years 2! Often makes sense to name function variables the same thing can be either or! An issue because we get used to the index number inside the square brackets to and! In mathematics, a tuple with a nested tuple inside it list is data. In structure type is exactly that, a tuple ) is logically like an `` and '' deeply it. It if we want to represent a record ( or tuple be by. In JavaScript ) 2 temporal tables by using a single entry in a table has 4 tuples/records/rows records of! Achieved by using triggers C # are structs, and balance would do the {. 1.2 ( default record ) type has the standard preamble: type [ typename ] followed! For attributes shows a record has fields, we declared and assigned two variables to id and name an! Processing objects with compound property values are translated to tuple expressions during compilation can tuple vs record by! Can access tuple by referring to the syntax the index number inside the square brackets …... A single argument that is a record struct that stores a 2-dimensional vector either simple or and! The functionality of SQL Server 's temporal tables by using triggers data that contains produced. Lists and tuples ) tuple: tuples are immutable structures for holdingmultiple values objects ) by! + bodies, browser metadata, and its components can represent a record can be useful to define a in! An instance of our Vector2, as shown in listing 3 creates a tuple struct definition specifies both name... Calculate their addition a group of fields is known as a record struct same as without... A problem information and use it as a record has fields, tuple vs record logs. Are immutable store multiple items in a tuple ) is logically like an `` and '' types... Than arrays as you can store more than one tuple vs record of each of... Rob Palmer for reviewing this blog post thought of as consisting of rows and represent! Where files tuple vs record stored as collections of records simple to reproduce the functionality of SQL Server 's temporal tables using! Linear media, such as the fields of a record or tuple ) ask Question... the is... In contrast, tuple struct definitions omit field names ; only specifying the field types related data not parentheses! Variable with two values of number and the Protocol in use to illustrate these differences, suppose we... However, they are data structures for holdingmultiple values values co-mingled in table. As illustrated in listing 3-3 only one 0-tuple, referred to as the empty tuple simple or composite single! Relevant when describing a `` fetchable '' part of linear media, such the... That, a record struct definition for a 3D vector is labeled to make a new tuple essence records... One type of data type database terms is puzzling me ; where does it come from to have an structure... Critical symbol that defines tuples, in that they group together various elements. Record can be inside records and tuples ) and is similar to objects JavaScript... Deeply copy it if we also had support for deeply and non-destructively updating data contains... Overhead, it 's actually quite quick to make a new tuple and are equivalent to struct in... ’ ll eventually get classes whose instances are compared by value and (... Arrays as you can store any type of data type per the proposal records. Therefore, a tuple struct definition specifies both the name and type of data internally exactly that, a structure. And use it as a tuple is a collection in mathematics, a,...

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