Javascript - 从数组中弹出一个值，但不在数组的末尾
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Javascript - Pop a value from array, but not at the end of array
提问by markzzz
I have for example this array (each number is singolar, no one duplicate) called pvalue : 1 2 3 15 20 12 14 18 7 8 (sizeof 10).
例如，我有一个名为 pvalue 的数组（每个数字都是单数，没有一个重复）：1 2 3 15 20 12 14 18 7 8 (sizeof 10)。
I need for example to pop the value "15", and after this pvalue should be 1 2 3 20 12 14 18 7 8 (sizeof 9). How can do it?
例如，我需要弹出值“15”，在这个 pvalue 之后应该是 1 2 3 20 12 14 18 7 8 (sizeof 9)。怎么办？
the pop() function take the value at the end of the array. I don't want this :) cheers
pop() 函数取数组末尾的值。我不想要这个 :) 欢呼
EDIT
编辑
for(i=0; i<pvalue.length; i++) {
if(pvalue[i]==param) {
ind=i;
break;
}
}
pvalue.splice(ind, 1);
采纳答案by T.J. Crowder
You're looking for splice. Example: http://jsbin.com/oteme3:
您正在寻找splice. 示例：http: //jsbin.com/oteme3：
var a, b;
a = [1, 2, 3, 15, 20, 12, 14, 18, 7, 8];
display("a.length before = " + a.length);
b = a.splice(3, 1);
display("a.length after = " + a.length);
display("b[0] = " + b[0]);
...displays "a.length before = 10", then "a.length after = 9", then "b[0] = 15"
...显示“a.length before = 10”，然后是“a.length after = 9”，然后是“b[0] = 15”
Note that splicereturns an arrayof the removed values rather than just one, but that's easily handled. It's also convenient for inserting values intoan array.
请注意，它splice返回一个包含已删除值的数组，而不仅仅是一个，但这很容易处理。将值插入数组也很方便。
回答by Delan Azabani
To pop the first one off, use:
要弹出第一个，请使用：
first = array.shift();
To pop any other one off, use:
要弹出其他任何一个，请使用：
removed = array.splice(INDEX, 1)[0];
