[JS] Application Splice The pit that occurs when multiple elements are removed

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Let's look at one fragment:

var fruits = ["Banana", "Orange", "Apple", "Mango"];fruits.splice (2,2);  # Banana,orange

The above two lines of code are absolutely no problem and can achieve the effect we want.

If it turns out to be the case:

var origin=["AA", "BB", "CC", "DD"]; var has = ["BB", "CC"]; var _index = [];  for inch origin) {    # here or use for: inch , not the    point. if ($.inarray (Origin[i], has)! =-1) {        _index.push (i);    }} # The focus is on for   _index) {    1);} Console.log (origin);  # will now output the results we want ["AA", "DD"]?

Run, we see the result is not what we want, because the original array was changed once splice, the index array index is rearranged neatly, so that the old index of our records is not right.

It turns out that.

So now we need to change the code for the Focus splice section:

var k = 0;  for inch _index) {    -K, 1);    K+ +;}

The principle is that we shrink the index value to achieve the purpose of the index pair to delete the element.

Link:http://www.cnblogs.com/farwish/p/5204370.html

[JS] Application Splice The pit that occurs when multiple elements are removed