javascript-tips.js

str.replace(/David/g, "Darren"); // "Darren is an Arsenal fan, which means Darren is great"

var clone = myArray.slice(0); // naive clone

var nodesArr = Array.prototype.slice.call(document.querySelectorAll("div")); // "true" array of DIVs

var argsArr = Array.prototype.slice.call(arguments); // changes arguments to "true" array


[
{ name: "Robin Van PurseStrings", age: 30 },
{ name: "Theo Walcott", age: 24 },
{ name: "Bacary Sagna", age: 28  }
].sort(function(obj1, obj2) {
    // Ascending: first age less than the previous
    return obj1.age - obj2.age;
});
// Returns:  
// [
//    { name: "Theo Walcott", age: 24 },
//    { name: "Bacary Sagna", age: 28  },
//    { name: "Robin Van PurseStrings", age: 30 }
// ]


var mergeTo = [4,5,6],
var mergeFrom = [7,8,9];

Array.prototype.push.apply(mergeTo, mergeFrom);

mergeTo; // is: [4, 5, 6, 7, 8, 9]

// Efficient Feature/Object Property Detection
if("geolocation" in navigator) {
    // Do some stuff
}

$("a.trigger").on("click", function(e) {
    //e.stop();
    preventDefault
});


var nodesArr = Array.prototype.slice.call(document.querySelectorAll("div")); // "true" array of DIVs

var argsArr = Array.prototype.slice.call(arguments); // changes arguments to "true" array