Содержание:
jQuery.map( array, callback )Возвращает: Array
Описание: Выполняет заданную функцию для каждого элемента массива (если задан массив) или каждого поля объекта (если задан объект) в отдельности. Значения, полученные в результате выполнения этой функции помещаются в новый массив и возвращаются как результат работы функции.
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Добавлен в версии: 1.0jQuery.map( array, callback )
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arrayТип: ArrayThe Array to translate.
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callbackThe function to process each item against. The first argument to the function is the array item, the second argument is the index in array The function can return any value. A returned array will be flattened into the resulting array. Within the function,
this
refers to the global (window) object.
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Добавлен в версии: 1.6jQuery.map( object, callback )
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objectТип: ObjectThe Object to translate.
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callbackThe function to process each item against. The first argument to the function is the value; the second argument is the key of the object property. The function can return any value to add to the array. A returned array will be flattened into the resulting array. Within the function,
this
refers to the global (window) object.
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If you wish to process a jQuery object — for example, $('div').map( callback );
— use .map() instead.
The $.map()
method applies a function to each item in an array or object and maps the results into a new array. Prior to jQuery 1.6, $.map()
supports traversing arrays only. As of jQuery 1.6 it also traverses objects.
Array-like objects — those with a .length
property and a value on the .length - 1
index — must be converted to actual arrays before being passed to $.map()
. The jQuery library provides $.makeArray() for such conversions.
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The translation function that is provided to this method is called for each top-level element in the array or object and is passed two arguments: The element's value and its index or key within the array or object.
The function can return:
- the translated value, which will be mapped to the resulting array
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null
orundefined
, to remove the item - an array of values, which will be flattened into the full array