常會有找出陣列中是否包含某元素的需求，過去會使用Array.prototype.indexOf() 來處理，但在ES2016 (ES7) 提供了Array.prototype.includes() 新 ... ... <看更多>

What is the most concise and efficient way to find out if a JavaScript array contains a value? This is the only way I know to do it: function contains(a, obj) { ... ... <看更多>

For primitive values, use the array.includes() method to check if an array contains a value. · For objects, use the isEqual() helper function to compare objects ... ... <看更多>

JavaScript : Array Contains. GitHub Gist: instantly share code, notes, and snippets. ... <看更多>

Style. Your braces are not styled consistently, and most JavaScript developers find sameline braces more idiomatic. I think it is better form to place your ... ... <看更多>