How would you split Regex subexpression matches in to multi-dimensional string arrays?

I have a "myvar" string of:

1-4:2;5-9:1.89;10-24:1.79;25-99:1.69;100-149:1.59;150-199:1.49;200-249:1.39;250+:1.29

which is a repeat of QuantityLow - QuantityHigh : PriceEach ;

I used this "myreg" Regex /(\d+)[-+](\d*):(\d+\.?\d*);?/g

Used it with var myarray = myvar.match(myreg);

that produced:

myarray[0] = "1-4:2;"
myarray[1] = "5-9:1.89;"
myarray[2] = "10-24:1.79;"
myarray[3] = "25-99:1.69;"
myarray[4] = "100-149:1.59;"
myarray[5] = "150-199:1.49;"
myarray[6] = "200-249:1.39;"
myarray[7] = "250+:1.29"

Fantastic! Except that I need the strings broken further by the Q1 - Q2 : P as noted above. The regex is already setup to identify the parts with parenthesis. I would think this could be done with a single Regex expression, or at least two, rather than setting up some sort of loop.

Thanks for the feedback.

How would you split Regex subexpression matches in to multi-dimensional string arrays?

I have a "myvar" string of:

1-4:2;5-9:1.89;10-24:1.79;25-99:1.69;100-149:1.59;150-199:1.49;200-249:1.39;250+:1.29

which is a repeat of QuantityLow - QuantityHigh : PriceEach ;

I used this "myreg" Regex /(\d+)[-+](\d*):(\d+\.?\d*);?/g

Used it with var myarray = myvar.match(myreg);

that produced:

myarray[0] = "1-4:2;"
myarray[1] = "5-9:1.89;"
myarray[2] = "10-24:1.79;"
myarray[3] = "25-99:1.69;"
myarray[4] = "100-149:1.59;"
myarray[5] = "150-199:1.49;"
myarray[6] = "200-249:1.39;"
myarray[7] = "250+:1.29"

Fantastic! Except that I need the strings broken further by the Q1 - Q2 : P as noted above. The regex is already setup to identify the parts with parenthesis. I would think this could be done with a single Regex expression, or at least two, rather than setting up some sort of loop.

Thanks for the feedback.

• javascript
• regex

3 Answers 3

You didn't say what the exact output you expect, but I imagine something like this output may be intuitive.

Given:

var myvar = "1-4:2;5-9:1.89;10-24:1.79;25-99:1.69;100-149:1.59;150-199:1.49;200-249:1.39;250+:1.29";

A quick way to capture all sub-matches is:

var matches = [];
myvar.replace(/(\d+)[-+](\d*):(\d+\.?\d*);?/g, function(m, a, b, c) {
    matches.push([a, b, c])
});

(Note: you can capture the same output with a [potentially more readable] loop):

var myreg = /(\d+)[-+](\d*):(\d+\.?\d*);?/g;
var matches = [];
while(myreg.exec(myvar)) {
    matches.push([RegExp.$1, RegExp.$2, RegExp.$3])
}

Either way, the oute is an array of matches:

matches[0]; // ["1", "4", "2"]
matches[1]; // ["5", "9", "1.89"]
matches[2]; // ["10", "24", "1.79"]
matches[3]; // ["25", "99", "1.69"]
matches[4]; // ["100", "149", "1.59"]
matches[5]; // ["150", "199", "1.49"]
matches[6]; // ["200", "249", "1.39"]
matches[7]; // ["250", "", "1.29"]

var r = /(\d+)[-+](\d*):(\d+\.?\d*);?/g;
var s = "1-4:2;5-9:1.89;10-24:1.79;25-99:1.69;100-149:1.59;150-199:1.49;200-249:1.39;250+:1.29";
var match;
while ((match = r.exec(s)) != null) {
  console.log("From " + match[1] + " to " + match[2] + " is " + match[3]);
}

The console.log() call is a Firefox/Firebug call. You can of course use alert(), document.write() or whatever else suits.

See RegExp object reference, in particular the RegExp methods, most notably RegExp.exec().

The simpliest way to do it - using split method of String:

var myvar = "1-4:2;5-9:1.89;10-24:1.79;25-99:1.69;100-149:1.59;150-199:1.49;200-249:1.39;250+:1.29";
myvar.split(';');

that produced:

["1-4:2", "5-9:1.89", "10-24:1.79", "25-99:1.69", "100-149:1.59", "150-199:1.49", "200-249:1.39", "250+:1.29"]