Regular expression to extract lat lon from string

Question

Hello all, This has to be easy, but I cannot seem to form the expression correctly. How can I extract the actual longitude value from the following web query (is a text string at the point where I am wanting to extract)? Vehicle ID:truck1 lat:34.833730000000003 lon:-82.352369999999993 dir:90.0 spd:0.0 lck:6 time:151842 date:03142011 trig:2 eof
I can match "lon:" using myString.match(/(lon:)/g) but I cannot seem to get the portion associated with the value. I need -82.352369999999993 or lon:-82.352369999999993 The number of digits for the longitude is not always the same, but it is always followed by a space then dir: Thanks in advance. Carmen

ctalleygreenville · Answer

Heming,

Thank you!  This worked perfectly and also makes more sense to me than using the RegExp.

Carmen

HemingZhu · Answer

Hello all, This has to be easy, but I cannot seem to form the expression correctly. How can I extract the actual longitude value from the following web query (is a text string at the point where I am wanting to extract)? Vehicle ID:truck1 lat:34.833730000000003 lon:-82.352369999999993 dir:90.0 spd:0.0 lck:6 time:151842 date:03142011 trig:2 eof
I can match "lon:" using myString.match(/(lon:)/g) but I cannot seem to get the portion associated with the value. I need -82.352369999999993 or lon:-82.352369999999993 The number of digits for the longitude is not always the same, but it is always followed by a space then dir: Thanks in advance. Carmen try this: function getlon(myString) { var strArray = myString.split(" "); for (var i = 0; i < strArray.length; i++) { if (strArray.indexOf("lon:") > -1) alert(strArray.split(":")[1]); } }

ctalleygreenville · Answer

Thank you for replying. That helped some. I had to remove the "^" and "$" for it to test true. However, I am not getting all of the number. Here is the small bit of code:var shortString = "Vehicle ID:truck1 lat:34.833730000000003 lon:-82.352369999999993 dir:90.0 spd:0.0 lck:6 time:151842 date:03142011 trig:2 eof
"; var myArray = shortString.match(/lat:-{0,1}((90|90.[0]{1,20}|[0-9]|[1-8][0-9])|(89|[0-9]|[1-8][0-9])[.]{1}[0-9]{1,20}){1}/g); alert(myArray[0]); All I get returned is "lat:3" not the desired "lat:34.833730000000003" I primarily work with Flex, so forgive me if I missed something obvious with the javascript. Thanks, Carmen