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In functional programming, filter is a higher-order function that processes a data structure (usually a list) in some order to produce a new data structure containing exactly those elements of the original data structure for which a given predicate returns the boolean value true. (en) Nella programmazione funzionale, una filter (in italiano: filtro) è una funzione che processa una struttura dati (tipicamente una lista) in un certo ordine per produrre una nuova struttura dati contenente solo quegli elementi della struttura originaria per i quali un dato predicato ritorna il valore booleano di vero, tale predicato è quindi la condizione che deve essere soddisfatta dagli elementi della struttura originaria per essere inclusi nell'output del filtro. (it) In programmeertalen is filter een hogere-ordefunctie waarmee een datastructuur (vaak een lijst) in een bepaalde volgorde wordt doorlopen om een nieuwe datastructuur te produceren die alleen de elementen bevat uit de oorspronkelijke datastructuur waarvoor een predicaat waar is. De functie komt onder andere voor in Haskell, Objective Caml, Standard ML, Python, Erlang, Perl (onder de naam grep) en JavaScript. bevat de functies remove-if en remove-if-not. bevat een implementatie van filter voor Scheme. C++ bevat de functies remove_if en remove_copy_if. Smalltalk heeft select: voor collecties. (nl) 在函数式编程中，过滤器（filter）是一个高阶函数，它按某种次序处理一个数据结构（通常是列表），来产一个新的数据结构，它精确的包含最初数据结构中给定对其返回布尔值true的那些元素。 (zh) |
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In functional programming, filter is a higher-order function that processes a data structure (usually a list) in some order to produce a new data structure containing exactly those elements of the original data structure for which a given predicate returns the boolean value true. (en) Nella programmazione funzionale, una filter (in italiano: filtro) è una funzione che processa una struttura dati (tipicamente una lista) in un certo ordine per produrre una nuova struttura dati contenente solo quegli elementi della struttura originaria per i quali un dato predicato ritorna il valore booleano di vero, tale predicato è quindi la condizione che deve essere soddisfatta dagli elementi della struttura originaria per essere inclusi nell'output del filtro. (it) In programmeertalen is filter een hogere-ordefunctie waarmee een datastructuur (vaak een lijst) in een bepaalde volgorde wordt doorlopen om een nieuwe datastructuur te produceren die alleen de elementen bevat uit de oorspronkelijke datastructuur waarvoor een predicaat waar is. De functie komt onder andere voor in Haskell, Objective Caml, Standard ML, Python, Erlang, Perl (onder de naam grep) en JavaScript. bevat de functies remove-if en remove-if-not. bevat een implementatie van filter voor Scheme. C++ bevat de functies remove_if en remove_copy_if. Smalltalk heeft select: voor collecties. (nl) 在函数式编程中，过滤器（filter）是一个高阶函数，它按某种次序处理一个数据结构（通常是列表），来产一个新的数据结构，它精确的包含最初数据结构中给定对其返回布尔值true的那些元素。 (zh) |
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Filter (higher-order function) (en) Filter (funzione) (it) Filter (hogere-ordefunctie) (nl) Filter (高阶函数) (zh) |
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