删除字符串方法详细报告

splice()
原型：array.splice(start[, deleteCount[, item1[, item2[, ...]]]])
下标，删除数量，增加的字符

ExamplesSection
Remove 0 (zero) elements from index 2, and insert "drum"Section
var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(2, 0, 'drum');

// myFish is ["angel", "clown", "drum", "mandarin", "sturgeon"] 
// removed is [], no elements removed
Remove 1 element from index 3Section
var myFish = ['angel', 'clown', 'drum', 'mandarin', 'sturgeon'];
var removed = myFish.splice(3, 1);

// removed is ["mandarin"]
// myFish is ["angel", "clown", "drum", "sturgeon"]
Remove 1 element from index 2, and insert "trumpet"Section
var myFish = ['angel', 'clown', 'drum', 'sturgeon'];
var removed = myFish.splice(2, 1, 'trumpet');

// myFish is ["angel", "clown", "trumpet", "sturgeon"]
// removed is ["drum"]
Remove 2 elements from index 0, and insert "parrot", "anemone" and "blue"Section
var myFish = ['angel', 'clown', 'trumpet', 'sturgeon'];
var removed = myFish.splice(0, 2, 'parrot', 'anemone', 'blue');

// myFish is ["parrot", "anemone", "blue", "trumpet", "sturgeon"] 
// removed is ["angel", "clown"]
Remove 2 elements from index 2Section
var myFish = ['parrot', 'anemone', 'blue', 'trumpet', 'sturgeon'];
var removed = myFish.splice(myFish.length - 3, 2);

// myFish is ["parrot", "anemone", "sturgeon"] 
// removed is ["blue", "trumpet"]
Remove 1 element from index -2Section
var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(-2, 1);

// myFish is ["angel", "clown", "sturgeon"] 
// removed is ["mandarin"]
Remove all elements after index 2 (incl.)Section
var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(2);

// myFish is ["angel", "clown"] 
// removed is ["mandarin", "sturgeon"]
Specifications