Regular Expression Help (Numbers with Decimal)

[ljwilson]

I am trying to create an array with the matched elements from a string. I am not having much success (the result is an empty array). Here is what I got:

var regpattern = new RegExp("^\d+(\.\d{1,2})?$");
var myarray = new Array;
myarray[21] = "TEXT NOT NEEDED";
myarray[22] = "Diagnosis: Other cardiorespiratory problems-V47.2; OTHER - RHEUMATIC FEVER W/O";
myarray[23] = "HEART INVOLV - 390; Paroxysmal supraventricular tachycardia-427.0; Partial";
myarray[24] = "congenital anomalous pulmonary venous"
myarray[25] = "MORE TEXT NOT NEEDED";

var mystring = myarray.slice(22,25," "); // This works

var stringarray = regpattern.exec(mystring);

What am I doing wrong?

 

[feherke]

Hi

[tt]new RegExp("^\d+(\.\d{1,2})?$");[/tt]

[ul]
[li]Inside a string you have to escape the special characters like backslash ( \ ) with a backslash[/li]
[li]You anchored the expression to both the beginning and the end, so it will match only if the entire string matches.[/li]
[/ul]

[tt]mystring = myarray.slice(22,25," ");[/tt]

[ul]
[li][tt]Array.slice()[/tt] expects only two parameters[/li]
[li][tt]Array.slice()[/tt] returns an array[/li]
[/ul]

[tt]stringarray = regpattern.exec(mystring);[/tt]

[ul]
[li][tt]RegExp.exec()[/tt] expects a string, so the array you passed will be stringified, that will insert commas ( , ) between the elements[/li]
[/ul]


Feherke.

http://free.rootshell.be/~feherke/

 

[ljwilson]

Thanks for the help. I see what I did wrong with the SLICE function (somehow I thought it would return a string with the third parameter as the delimiter). What would I need to use for defining that regular expression if I only wanted numbers with or without decimals to be matched?

 

[vacunita]

Try somethng like

/[0-9]+\.?[0-9]+?/g


Additionally, exec while it returns an array, it doesn't return it all in one go, you need to call it in a loop until it can find no more matches to get all the possible results.

var i=0;
var stringarray=new Array();
while(stringarray[i]=regpattern.exec(mystring)){
i++;
}

----------------------------------
Phil AKA Vacunita
----------------------------------
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