从可变长度字符串中提取经纬度

Question

I want extract lat. and longitude vals from a string like this:

var data = "(-20.210696507479017, -70.14000177383423),(-20.21202551027535, -70.14246940612793),(-20.21385790460967, -70.14066696166992),(-20.21168319245841, -70.13901472091675)" 

How can I extract these pairs and push them into a array if these points can change in quantity?

Thanks

Answer 1

Split the pairs, then split each pair and parse the values. This produces an array of objects that have a lat and lng property that are numbers:

var coors = data.split('),(');
for (var i = 0; i < coors.length; i++) {
  var c = coors[i].replace('(', '').replace(')', '').split(',');
  coors[i] = { lat: parseFloat(c[0]), lng: parseFloat(c[1]) };
}

Demo: http://jsfiddle.net/Guffa/EV2h4/

Answer 2

Why not transform it into a json string array, then parse it to an object.

var data = "(-20.210696507479017, -70.14000177383423),(-20.21202551027535, -70.14246940612793),(-20.21385790460967, -70.14066696166992),(-20.21168319245841, -70.13901472091675)";
var arr = JSON.parse("[" + data.replace(/[)(]/g, "") + "]");
for(var x=0; x<arr.length-1; x+=2)
    console.log("lat " + arr[x] + ", lon " + arr[x+1]);

edit x+=2, good catch Iftah