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javascript ɾ³ýÊý×éÔªËصÄÒªÁìÓУº1. splice() ɾ³ýÖ¸¶¨Ë÷ÒýµÄÔªËز¢·µ»Øɾ³ýµÄÔªËØ £»2. pop() ɾ³ý²¢·µ»Ø×îºóÒ»¸öÔªËØ £»3. shift() ɾ³ý²¢·µ»ØµÚÒ»¸öÔªËØ £»4. filter() ͨ¹ý»Øµ÷º¯Êýɸѡ²»Öª×ãÌõ¼þµÄÔªËز¢·µ»ØÐÂÊý×é¡£

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JavaScript ÌṩÁ˶àÖÖÒªÁìÀ´É¾³ýÊý×éÖеÄij¸öÔªËØ¡£ÒÔÏÂÊÇ×î³£ÓõÄÒªÁ죺

1. splice() ÒªÁì

splice() ÒªÁì¿ÉÒÔÒ»´ÎÐÔɾ³ýÊý×éÖÐÒ»¸ö»ò¶à¸öÔªËØ £¬²¢·µ»ØÒ»¸ö°üÀ¨ÒÑɾ³ýÔªËصÄÐÂÊý×é¡£Óï·¨ÈçÏ£º

array.splice(start, deleteCount)

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start£ºÒª×îÏÈɾ³ýÔªËصÄË÷Òý¡£

deleteCount£ºÒªÉ¾³ýµÄÔªËØÊýÄ¿¡£

ÀýÈç £¬É¾³ýÊý×é [1, 2, 3, 4, 5] ÖÐË÷ÒýΪ 2 µÄÔªËØ£º

const arr = [1, 2, 3, 4, 5];
arr.splice(2, 1); // ɾ³ýË÷ÒýΪ 2 µÄÔªËØ
console.log(arr); // [1, 2, 4, 5]

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2. pop() ÒªÁì

pop() ÒªÁì´ÓÊý×éµÄĩβɾ³ý×îºóÒ»¸öÔªËØ £¬²¢·µ»Ø¸ÃÔªËØ¡£Óï·¨ÈçÏ£º

array.pop()

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ÀýÈç £¬É¾³ýÊý×é [1, 2, 3] ÖеÄ×îºóÒ»¸öÔªËØ£º

const arr = [1, 2, 3];
const removedElement = arr.pop(); // ɾ³ý²¢·µ»ØÊý×éµÄ×îºóÒ»¸öÔªËØ
console.log(arr); // [1, 2]
console.log(removedElement); // 3

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3. shift() ÒªÁì

shift() ÒªÁì´ÓÊý×éµÄ¿ªÍ·É¾³ýµÚÒ»¸öÔªËØ £¬²¢·µ»Ø¸ÃÔªËØ¡£Óï·¨ÈçÏ£º

array.shift()

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ÀýÈç £¬É¾³ýÊý×é [1, 2, 3] ÖеĵÚÒ»¸öÔªËØ£º

const arr = [1, 2, 3];
const removedElement = arr.shift(); // ɾ³ý²¢·µ»ØÊý×éµÄµÚÒ»¸öÔªËØ
console.log(arr); // [2, 3]
console.log(removedElement); // 1

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4. filter() ÒªÁì

filter() ÒªÁ콨ÉèÒ»¸ö°üÀ¨Öª×ã¸ø¶¨Ìõ¼þµÄÐÂÊý×é £¬ÆäÖв»°üÀ¨²»Öª×ãÌõ¼þµÄÔªËØ¡£Óï·¨ÈçÏ£º

array.filter(callbackFunction)

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callbackFunction£ºÒ»¸ö²âÊÔÿ¸öÔªËØÊÇ·ñÖª×ãÌõ¼þµÄº¯Êý¡£

ÀýÈç £¬É¾³ýÊý×é [1, 2, 3, 4] ÖÐËùÓÐżÊý£º

const arr = [1, 2, 3, 4];
const evenNumbers = arr.filter(num => num % 2 === 0);
console.log(evenNumbers); // [2, 4]

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