In the CoffeeScript docs for array splicing, what is the purpose of the trailing , _ref?  CoffeeScript:  numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] numbers[3..6] = [-3, -4, -5, -6]   Compiles to:  var numbers, _ref; numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8...

I am using CoffeeScript along with the JS splice function.  My understanding of the JS splice function is that it should return the objects that were spliced out and modify the original array.  This seems to work ok with simple arrays but when I star...

Why below array is not being removed.   var removeableIndex =-1;         bookingStatus.bookings.filter(function(item, index) {             if(item.id == id){                 removeableIndex = index;                 return true;             }...

I need to delete a subarray if it has a particular element.  function filteredArray(arr, elem) {   let newArr = [];   for (let i = 0; i < arr.length; i++){     for (let j = 0; j < arr[i].length; j++) {       if (arr[i][j] === elem) {         ar...

So I have the following array:  var hdr = ("name", "date", "start_time", "selling_item", "total_call",             "end_time", "ad_num", "area", "order_num"); //this data is retu...

Hi I have this simple script in my code,  var c = [{a: 'apple'},{b: 'ball'},{c: 'ball'},{d: 'ball'}]; console.log(c); //prints 3 objects var d = c;  d.splice(0, 3);          console.log(c); //prints 1 object         co...

var a = ['lkg','ukg']; var b = ['lkg_stud_name','ukg_stud_name'];   I want to below like this?   var c =(         ['lkg','lkg_stud_name'],         ['ukg','ukg_stud_name']     );   For ex...

This is the first time I've ever tried to write any code, so please give me a break if what i did makes no sense & please explain what's going on. i've never taken a class or anything, just read a couple books, so i would appreciate i...

I am writing a script that onload will add a class to a random 4 of 12 DIV's and then remove the ID of the DIV from the array.  I have an array setup with all 12 DIV ID's in it.  Sometimes when I reload the page, 4 DIV'S have that class a...

I was wondering about this piece of code:  var numbers, _ref; numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];  [].splice.apply(numbers, [3, 4].concat(_ref = [-3, -4, -5, -6])), _ref; alert(numbers);   From here, the result is [0, 1, 2, -3, -4, -5, -6, 7, 8...