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Some utility functions.

Install

browser - global variable

<script src="util-ma.js"></script>

The global variable u is used, you can change it from here.

browser - requirejs

define(['util-ma'], function (util) {
    util.isObj([]) // false
});

node

const util = require('util-ma');

Doc

Function	Description
`isObj(v)`	Is value an object?
`isNull(v)`	Is value `null`?
`isInt(n)`	Is number an integer?
`isOdd(n)`	Is number odd?
`isEmptyObj(v)`	Is value an empty object?
`moveArrItem(arr, from, to)`	Move array item from to.
`negateNum(n)`	Make a positive number negative.
`positNum(n)`	Make a negative number positive.
`reverseNumSign(n)`	Reverse a number's sign.
`randInt(min, max)`	Generate a random integer, between min and max arguments. (default between 0 and 10)
`randFloat(min, max)`	Generate a random floating-point, between min and max arguments. (default between 0 and 10)
`toDecimalPlace(n)`	Filter a floating-point decimal places to a specific amount.
`substrBeforeLast(char, str)`	Get the substring before the last occurrence of `char` in `str`.
`substrAfterLast(char, str)`	Get the substring after the last occurrence of `char` in `str`.
`substrBeforeFirst(char, str)`	Get the substring before the first occurrence of `char` in `str`.
`substrAfterFirst(char, str)`	Get the substring after the last occurrence of `char` in `str`.
`extend( obj1, obj2 [, obj3, ...] )`	Make the right-most object argument inherit from the previous left object arguments. (`obj2` inherits from `obj1`, `obj3` inherits from `obj2`.)

util.extend() example:

function newPerson(name, age) {
    var inst = {}; // the instance (this)
 
    inst.name = name || "no_name";
    inst.age  = age  || false;
 
    return inst;
}
 
function newEmployee(name, age, jobTitle, id) {
    var inst = {}, // the instance (this)
        person = newPerson(name, age),
        idCounter = 0;
 
    inst = util.extend( person, inst );
 
    inst.jobTitle  = jobTitle || "uknown_title";
    inst.employeId = id       || "employe_"+(idCounter+=1);
 
    return inst;
}
 
var employee = newEmployee("ali", 26, "product_manager");
 
employee.name      // "ali"
employee.age       // 26
employee.jobTitle  // "product_manager"
employee .id       // "employe_1"
 
// You can think of it this way:
class Employee extends Person {
    constructor(name, age, jobTitle, id) {
        super(name, age);
    }
}

util-ma

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browser - global variable

browser - requirejs

node

Doc

util.extend() example:

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