👔Object+arrayLike
JS ⟩ object ⟩ built-in ⟩ Array ⟩ array-like ⟩ Object+arrayLike
extend array-like objects with custom methods.
TouchList+ext - TouchList is an array-like.
💾 replit：Object+arrayLike
// 2023.01.17 - 07:57 - first draft
// --------------------------------------------------
// helpers
function checkType(obj) {
if (!('length' in obj)) {
throw Error(`${obj} is not an "array-like" object!`)
}
}
// ⭐️ Object + array-like
// --------------------------------------------------
// 🔹 .map()
//
Object.defineProperties(Object.prototype, {
// 🔹 .map()
map: {
value: function(f) {
checkType(this);
const arr = [];
for (let i = 0; i < this.length; i++) {
arr.push(f(this[i]));
}
return arr;
}
},
});
// export
// -------------------------------------------
export {}; // ES module
// module.exports = {}; // CommonJS moduleLast updated
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