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Javascript - extract specific numbers from string

I'm trying to extract specific numbers from a string, but I'm not sure how to accomplish it.

The line looks like:

center=43.571464,7.129565&zoom=12&size=480x225&markers=color:red%7Clabel:1%7C43.580293713725936,7.115145444335894&markers=color:red%7Clabel:2%7C43.56512073056565,7.121668576660113&sensor=false

The array I want is the coordinates of the marker near the end, specifically:

[43.580293713725936,7.115145444335894,43.56512073056565,7.121668576660113]

I thought I could select these numbers using their precision (15), but I don't know how much better it is. I swear when it comes to using regular expressions. Right now the best I have is:

str.match(/[-+]?[0-9]*\.?[0-9]+/g)

But that just gives me all the numbers.

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2 answers


If your string is in str

then use this regex.

var coordinates = decodeURIComponent(str).match(/([\d.]{10,})/g);


http://jsfiddle.net/CHfcT/

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You can try using the following regex

/\d+\.\d{7,}/g

This assumes that:

  • Marker coordinates always have 7 or more numbers after point
  • No other part of the line contains a similar pattern with more than 7 numbers after the dot


Example ( JSFiddle ):

str.match(/\d+\.\d{7,}/g);

The reason I chose 7 was because the other numbers in the sample had 6, so it excludes them. If you know that coordinates always have a fixed number of decimal places, then you can simply use that specific number without, ,

like this:

/\s+\.\d{10}/g
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