JSFiddle - React, Tailwind, and code Playground

by David Thomas

JavaScript

Object.prototype.removeIf = function (needle, opts) {
    var self = this,
        settings = {
            'beginsWith' : true,
            'endsWith' : false,
            'sensitive' : true
        };
    opts = opts || {};
    for (var p in settings) {
        if (settings.hasOwnProperty(p)) {
            settings[p] = typeof opts[p] == 'undefined' ? settings[p] : opts[p];
        }
    }
    var modifiers = settings.sensitive === true ? '' : 'i',
        regString = (settings.beginsWith === true ? '^' : '') + needle + (settings.endsWith === true ? '$' : ''),
        reg = new RegExp(regString, modifiers);
    for (var prop in self) {
        if (self.hasOwnProperty(prop) && reg.test(prop)){
            delete self[prop];
        }
    }
    return self;
};

var map = {
    'XKey1' : "Value1",
    'XKey2' : "Value2",
    'YKey3' : "Value3",
    'YKey4' : "Value4",
};

console.log(map);
map.removeIf('Y');
console.log(map);