JavaScript operator similar to SQL "like" [duplicate]

You can use regular expressions in Javascript to do pattern matching of strings.

For example:

var s = "hello world!";
if (s.match(/hello.*/)) {
  // do something
}

The match() test is much like WHERE s LIKE 'hello%' in SQL.

No.

You want to use: .indexOf("foo") and then check the index. If it's >= 0, it contains that string.

Use the string objects Match method:

// Match a string that ends with abc, similar to LIKE '%abc'
if (theString.match(/^.*abc$/)) 
{ 
    /*Match found */
}

// Match a string that starts with abc, similar to LIKE 'abc%'
if (theString.match(/^abc.*$/)) 
{ 
    /*Match found */
}

You can check the String.match() or the String.indexOf() methods.

No there isn't, but you can check out indexOf as a starting point to developing your own, and/or look into regular expressions. It would be a good idea to familiarise yourself with the JavaScript string functions.

EDIT: This has been answered before:

Emulating SQL LIKE in JavaScript

JavaScript operator similar to SQL "like" [duplicate]

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