if (album_text.length === 0) will tell you if the array is empty as long as it is a valid, initialized array (which it is here). ... <看更多>

a = [];. This code assigned the array a to a new empty array. It works perfectly if you do not have any references to the ... ... <看更多>

IT appears all the way back to jQuery 1.2 where multiple value support was added. The reason an empty array is not returned is the check for ... ... <看更多>

Select2 JQuery Plugin. ... By default, this option is set to an empty array which means tokenization using the default tokenizer is disabled. ... <看更多>