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js array Find the element by index and return the element
Array.prototype.itemOf = function(index) {
for (var i = 0; i < this.length; i++){
if (i === index) { return this[i]; }
}return -1;};
arr[index], put the index in square brackets to directly access the relevant elements. Is that what you're asking?
Can you be more specific?
Need to find it? ?
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Array.prototype.itemOf = function(index) {
for (var i = 0; i < this.length; i++)
{
}
return -1;
};
arr[index], put the index in square brackets to directly access the relevant elements. Is that what you're asking?
Can you be more specific?
Need to find it?
?