Some random bits of code that I have found useful or interesting over the years; Hopefully it will be helpful for you as well.
A common problem I run into when coding is dealing with the limited object types of a particular language. Hopefully a yearly compilation of all these snippets can provide a script that expands languages to what they should have had in the first place.
Array.prototype.remove = function(item) {
var i = this.indexOf(item);
if (i!=-1) this.splice(i, 1);
};
Another worthy one for the notebooks, the random entry of an array!
Array.prototype.random = function() {
return this[Math.floor(Math.random()*this.length)];
};
I can’t take credit from this one, but I think the guys at Hummingbird had something right with their recursive sum function for arrays. This function simply sums the numbers in an array.
Array.prototype.sum = function() {
return (! this.length) ? 0 : this.slice(1).sum() +
((typeof this[0] == 'number') ? this[0] : 0);
};
Humminbird and their helpers.js file, where they add a simple time formatting function to their Date object.
Date.prototype.formattedTime = function() {
var formattedDate = this.getHours();
var minutes = this.getMinutes();
if(minutes > 9) {
formattedDate += ":" + minutes;
} else {
formattedDate += ":0" + minutes;
}
var seconds = this.getSeconds();
if(seconds > 9) {
formattedDate += ":" + seconds;
} else {
formattedDate += ":0" + seconds;
}
return formattedDate;
};
After writing writing my fair share of for-loops, I decided there must be a better way to repeat a string. Personally, I found this solution to be very elegant and hopefully will help you as much as it helped me.
String.prototype.repeat = function(n) {
return new Array(1 + n).join(this);
}
Here is a quick one for you today. Ever just want a simple way to see if there is an item in an array? Well fear not, this little snippet is to the rescue!
Array.prototype.contains = function(x) {
return (this.indexOf(x) > -1);
}