Question

I’m trying to set up an IF statement if a value is contained within an array.

I’ve found some code which claimed to work but it doesn’t seem to be.

var myAsi = ['01','02','24OR01','30De01','9thC01','A.Hu01','A01','AACAMSTE','ABBo01','ABBo02','ABC-01','ACCE01','Acce02','AceR01','h+dm01','Merr02','Ofak01','Wage01','Youn01'];

Array.prototype.find = function(searchStr) {
  var returnArray = false;
  for (i=0; i<this.length; i++) {
    if (typeof(searchStr) == 'function') {
      if (searchStr.test(this[i])) {
        if (!returnArray) { returnArray = [] }
        returnArray.push(i);
      }
    } else {
      if (this[i]===searchStr) {
        if (!returnArray) { returnArray = [] }
        returnArray.push(i);
      }
    }
  }
  return returnArray;
}

var resultHtml = '';
resultHtml+='<table style ="width: 400px">';
resultHtml+='<tr colspan="2">';
resultHtml+='<td colspan="2">';
resultHtml+='<b><font color = "Red">(Client Code)</font><br><font color = "green">(Company Name)</font></b>';
resultHtml+='</td>';
resultHtml+='</tr>';

$.each(data, function(i,item){
  resultHtml+='<div class="result">';
  resultHtml+='<tr>';
  if (notFound=myAsi.find("'"+item.code+"'") == false) {
    resultHtml+='<td>';
  }
  else {
    resultHtml+='<td bgcolor=#D8D8D8>';
  }
  resultHtml+='<font color = "red">'+item.code+'</font><br>';
  resultHtml+='<font color = "green">'+item.content+'</font></td>';
  resultHtml+='<td style ="width: 80px"><a href="delete.php?UserID=<?php echo $userID ?>&AddCode='+item.code+'">Remove</a> - ';
  resultHtml+='<a href="insert.php?UserID=<?php echo $userID ?>&AddCode='+item.code+'">Add</a>';
  resultHtml+='</td>';
  resultHtml+='</tr>';
  resultHtml+='</div>';
  });
resultHtml+='</table>';

The item.code cycles through and I need an IF statement to tell me if it appears within the array.

Any help would be great.

Answer 1

If you only want to find if an item is in an array you could use a simpler function than that. For eg. the jQuery implementation:

// returns index of the element or -1 if element not present
function( elem, array ) {
    if ( array.indexOf ) {
        return array.indexOf( elem );
    }
    for ( var i = 0, length = array.length; i < length; i++ ) {
        if ( array[ i ] === elem ) {
            return i;
        }
    }
    return -1;
},

This uses the native browser implementation of indexOf if available (all browsers except IE I think), otherwise a manual loop.