Javascript useful functions/protoytpes

javascript useful functions and prototypes.js

// convert string to proper case
String.prototype.toProperCase = function () {
	return this.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
};

// convert string to snake case
String.prototype.toSnakeCase = function () {
	return this.replace(/(.)([A-Z])/g, "$1_$2").toLowerCase();
};

// check if string is a valid date
String.prototype.isDate = function () {
	var dateFormat;

	if (toString.call(this) === '[object Date]') {
		return true;
	}
	if (typeof this.replace === 'function') {
		this.replace(/^\s+|\s+$/gm, '');
	}

	dateFormat = /(^\d{1,4}[\.|\\/|-]\d{1,2}[\.|\\/|-]\d{1,4})(\s*(?:0?[1-9]:[0-5]|1(?=[012])\d:[0-5])\d\s*[ap]m)?$/;

	if (dateFormat.test(this)) {
		return !!new Date(this).getTime();
	}

	return false;
};

// check if string is a time
String.prototype.isTime = function () {
	var isValid = /^([0-1]?[0-9]|2[0-3]):([0-5][0-9])(:[0-5][0-9])?$/.test(this);
	return isValid;
};

// check if string is a time
String.prototype.isDateTime = function () {
	var date = this.split(" ");

	if (date[0].isDate() && date[1].isTime()) {
		return true;
	}

	return false;
};

// check if the string is a url/link
String.prototype.isURL = function() {
	var pattern = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
	return pattern.test(this);
}

// create slug from string
String.prototype.slugify = function() {
	str = this.replace(/^\s+|\s+$/g, ''); // trim
	str = str.toLowerCase();

	// remove accents, swap ñ for n, etc
	var from = "ÁÄÂÀÃÅČÇĆĎÉĚËÈÊẼĔȆÍÌÎÏŇÑÓÖÒÔÕØŘŔŠŤÚŮÜÙÛÝŸŽáäâàãåčçćďéěëèêẽĕȇíìîïňñóöòôõøðřŕšťúůüùûýÿžþÞĐđßÆa·/_,:;";
	var to   = "aaaaaacccdeeeeeeeeiiiinnoooooorrstuuuuuyyzaaaaaacccdeeeeeeeeiiiinnooooooorrstuuuuuyyzbBDdBAa------";

	for (var i=0, l=from.length ; i<l ; i++) {
		str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
	}

	str = str.replace(/[^a-z0-9 -]/g, '') // remove invalid chars
		.replace(/&/g, '-and-') // replace '&' with 'and'
		.replace(/\s+/g, '-') // collapse whitespace and replace by -
		.replace(/-+/g, '-') // collapse dashes
		.replace(/[^\w\-]+/g, '') // remove all non-word chars
		.replace(/\-\-+/g, '-') // replace multiple '-' with single '-'
		.replace(/^-+/, '') // Trim - from start of text
		.replace(/-+$/, ''); // Trim - from end of text

	return str;
}

// Prototyping for getting month long name and short name
Date.prototype.getMonthName = function(lang) {
	lang = lang && (lang in Date.locale) ? lang : 'en';
	return Date.locale[lang].month_names[this.getMonth()];
};

Date.prototype.getMonthNameShort = function(lang) {
	lang = lang && (lang in Date.locale) ? lang : 'en';
	return Date.locale[lang].month_names_short[this.getMonth()];
};

Date.locale = {
	en: {
		month_names: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
		month_names_short: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
	}
};

// check if array contains element
Array.prototype.contains = function(obj) {
	var i = this.length;
	while (i--) {
		if (this[i] === obj) {
			return true;
		}
	}
	return false;
}

// get random element from array
Array.prototype.random = function () {
	return this[Math.floor((Math.random()*this.length))];
}

// get object from localstorage
Storage.prototype.getObject = function(key) {
	var value = this.getItem(key);
	return value && JSON.parse(value);
}

// set object in localstorage
Storage.prototype.setObject = function(key, value) {
	this.setItem(key, JSON.stringify(value));
}