JSFiddle - React, Tailwind, and code Playground

JavaScript

var string = 'I am a human';
var matchResult = string.match(/human/g);
var values = ['value1', 'value2'];

Array.prototype.inArray = function(){
    console.log('inArray function');    
}

console.log(matchResult);
console.log(values);

console.log('case 1 (error) :');
for(var i in values){
    console.log(i + ' : ' + values[i]);
}

console.log('case 2 (success) :');
for(var i in values){
    if (values.hasOwnProperty(i)) {
        console.log(i + ' : ' + values[i]);
    }
}

console.log('case 3 (success) :');
function logArrayElements(element, index, array) {
    console.log("a[" + index + "] = " + element);
}
values.forEach(logArrayElements);