A brief talk on the precautions for deleting elements in an array using the Splice function _javascript tips

Considerations for deleting elements in an array using the Splice function

Delete an element with a value of C:

<script>
var arr = new Array ();
Arr[0] = ' a ';
Arr[1] = ' B ';
ARR[2] = ' C ';
ARR[3] = ' C ';
ARR[4] = ' e ';

for (var i=0 i<arr.length; i++) {
  if (arr[i] = = ' C ') {
    arr.splice (i,1);
    i=i-1;  I must subtract 1, otherwise one of the following elements will be skipped
  }
</script>

Note: If you use for (i in ARR), one of the following elements will always jump over

<script>

var arr = new Array ();
Arr[0] = ' a ';
Arr[1] = ' B ';
ARR[2] = ' C ';
ARR[3] = ' C ';
ARR[4] = ' e ';

For (i in arr) {

  if (arr[i] = = ' C ') {
    arr.splice (i,1);
    i=i-1;  This line of code is invalid and the value of I does not change

  }
  alert (arr.length);
}
</script>

This article discusses the use of the splice function in the array of elements to delete the note is small set to share all the content, hope to give you a reference, but also hope that we support cloud habitat community.