How to determine whether an element is contained in an angularjs array

Below I will share with you an example of determining whether an angularjs array contains a certain element. It has a good reference value and I hope it will be helpful to everyone.

This is the in_array function, which determines whether an array contains an element.

  Array.prototype.in_array = function(e)
  {
    for(i=0;i<this.length;i++)
    {
      if(this[i] == e)
        return true;
    }
    return false;
  }

How to use:

tmp.in_array(id)

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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