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How to Use the splice () method in JavaScript
This article mainly introduces how to use the splice () method in JavaScript. It is the basic knowledge of JS beginners. For more information, see
The splice () method of the JavaScript array changes the content of the array, adds new elements, and removes old elements.
Syntax
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Array. splice (index, howMany, [element1] [,..., elementN]); |
The following is the detailed information about the parameters:
Index: the array that changes at the beginning of the index.
How: integer, indicating that the number of elements in the old array is removed. If the howmany value is 0, no elements are deleted.
Element1,..., elementN: add the element to the array. If no element is specified, you only need to delete the elements in the array.
Return Value:
Returns the input-based parameter extraction array.
Example:
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<Html> <Head> <Title> JavaScript Array splice Method </title> </Head> <Body> <Script type = "text/javascript"> Var arr = ["orange", "mango", "banana", "sugar", "tea"];
Var removed = arr. splice (2, 0, "water "); Document. write ("After adding 1:" + arr ); Document. write ("<br/> removed is:" + removed );
Removed = arr. splice (3, 1 ); Document. write ("<br/> After adding 1:" + arr ); Document. write ("<br/> removed is:" + removed );
</Script> </Body> </Html> |
This produces the following results:
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After adding 1: orange, mango, water, banana, sugar, tea Removed is: After adding 1: orange, mango, water, sugar, tea Removed is: banana |
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