iterate over javascript object variables containing regex expressions

Question

I'm wondering if this is possible. I'm trying to iterate over an object containing regex expressions as below:

var formats = {
    AUS:"/^\D*0(\D*\d){9}\D*$/",
    UK: "/^\D*0(\D*\d){9}\D*$/"
        };

    var matched = false;

for (var i in formats) {
    if (!matched) {
        var format = formats[i];
        matched = value.match(formats[i]);
    }
}

I appreciate both AUS & UK expressions are the same value but this is just to prove the concept.

the value I'm matching is 0423887743 and it works when i do the following:

value.match(/^\D*0(\D*\d){9}\D*$/);

Mark Vayngrib · Accepted Answer · 2013-10-19 05:03:14Z

2

Change it to:

var formats = {
   AUS:/^\D*0(\D*\d){9}\D*$/,
   UK: /^\D*0(\D*\d){9}\D*$/
};

The way you have it, it's strings not regular expressions.

answered Oct 19, 2013 at 5:03

Mark Vayngrib

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Comments

Alexei Levenkov · Accepted Answer · 2013-10-19 05:03:42Z

1

string.match takes regular expression as parameter, but you are passing a string.

You can either store regular expressions in your object:

var formats = {
    AUS: /^\D*0(\D*\d){9}\D*$/,
    UK: /^\D*0(\D*\d){9}\D*$/
        };

Or create regular expressions from strings:

var format = new RegExp(formats[i]);
matched = value.match(format);

answered Oct 19, 2013 at 5:03

Alexei Levenkov

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Comments

Iłya Bursov · Accepted Answer · 2013-10-19 05:13:16Z

1

I'm not sure why do you need so strange regexp, here is working code:

var formats = {
 AUS:"^0[0-9]{9}$",
 UK: "^0[0-9]{9}$"
};

var matched = false;
var value = '0423887743';
for (var i in formats) {
    if (!matched) {
        var format = formats[i];
        var re = new RegExp(formats[i]);
        matched = ( re.exec(''+value) != null );
    }
}
alert(matched);

NOTE: this code supposes that your format are strings, so you do not need / at the begin and end, if you need them - store without quotes, it will be regexp

answered Oct 19, 2013 at 5:13

Iłya Bursov

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