sort_ip.js

#!/usr/bin/env node
/**
 * sort_ip.js
 *
 * run with: 'node ./sort_ip.js'
 */

// compare function
var compare = function(a, b) {
    var aa = a.split("."),
        bb = b.split(".");

    for (var i = 0; i < 4; i++) {
        var aai = parseInt(aa[i]),
            bbi = parseInt(bb[i]);

        if (aai == bbi) continue;
        if (aai < bbi) return -1;
        else return 1;
    }
    return 0;
}

// not sorted
not_sorted = [
    "10.0.10.1",
    "192.168.1.12",
    "10.0.10.44",
    "192.168.1.1",
    "10.0.10.15",
    "10.0.10.90",
    "100.10.10.1",
    "191.122.123.112",  
    "192.161.1.1",  
    "191.122.123.1",  
    "123.24.5.78",  
    "121.24.5.78",  
    "123.24.4.78",  
    "123.2.5.78",  
    "192.1.1.1",  
    "125.45.67.89",  
    "1.1.1.1",  
    "3.4.5.6",  
    "2.2.2.2",  
    "6.6.6.7",  
    "155.155.23.0"
];

// sorted
sorted = [
    "1.1.1.1",  
    "2.2.2.2",  
    "3.4.5.6",  
    "6.6.6.7",  
    "10.0.10.1",
    "10.0.10.15",
    "10.0.10.44",
    "10.0.10.90",
    "100.10.10.1",
    "121.24.5.78",  
    "123.2.5.78",  
    "123.24.4.78",  
    "123.24.5.78",  
    "125.45.67.89",  
    "155.155.23.0",
    "191.122.123.1",  
    "191.122.123.112", 
    "192.1.1.1",  
    "192.161.1.1",  
    "192.168.1.1",
    "192.168.1.12"
];

// do it
not_sorted.sort(compare);

// check it
for (var i=0, len = sorted.length; i < len; i++) {
    if (not_sorted[i] == sorted[i])
        console.log("GOOD : "+not_sorted[i]+" == "+sorted[i])
    else
        console.log(" BAD : "+not_sorted[i]+" != "+sorted[i])
}