How to test if array item's text contains a substring?

Question

I've been doing research on testing if a value exists in an array, and keep getting matches for indexOf('textvalue').

But, my 'textvalue' will be a substring, and therefore won't pull a match. This is because I'm passing the field name to the method, and just need to delete the "Door: Front Left;" text by matching the array item on "Door". Does anyone know how I can accomplish this?

Here's the example code I'm working on:

(spnSelectedDisclosures will have a list of selected fields, and this is the code to remove the previous field selection from the text, which is semi-colon delimited.)

var currentText = $("#spnSelectedDisclosures").text();

var existingArr = currentText.split(";")

for (i=0;i < existingArr.length;i++) {

   var indexItem = " " + existingArr[i].toString(); // why is this still an object, instead of a string? Adding a space to it was a desperate try to make indexItem a string variable.

    if (indexItem.contains(substringText)) { // offending line, saying the object has no method 'contains'
       alert("there's been a match at: " + i);
       textToRemoveIndex = i;
       break;
    }
  }

 var textToRemove = existingArr[textToRemoveIndex];
 var newText = currentText.replace(textToRemove,""); 
 $("#spnSelectedDisclosures").text(newText);

Maxime R.C · Accepted Answer · 2013-06-25 17:19:18Z

3

What's about this?

for (i=0;i < existingArr.length;i++) {
  if (existingArr[i].indexOf(substringText) > -1) { 
    alert("there's been a match at: " + i);
    textToRemoveIndex = i;
    break;
  }
}

answered Jun 25, 2013 at 17:19

Maxime R.C

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1 Comment

grayboat Over a year ago

Ah ok. I was going about it in a direct way. This makes sense, too. Just have to look for index to be a positive number, and that essentially means "contains". Thanks, guys! Also, thanks for the compatibility mention regarding the .contains().

epascarello · Accepted Answer · 2013-06-25 17:18:01Z

0

String.contains() has very limited support:

Browser compatibility

Chrome              Not supported
Firefox (Gecko)     19.0 (19)
Internet Explorer   Not supported
Opera               Not supported
Safari              Not supported

You need to use a regular expression or indexOf.

if (indexItem.indexOf(substringText)!==-1) {

edited Jun 25, 2013 at 17:18

answered Jun 25, 2013 at 17:12

epascarello

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