In this fiddle http://jsfiddle.net/mjmitche/6nar4/3/, if you drag, for example, the little blue box into the yellow box, then the big black box will turn pink. All of the 4 boxes along the left can be dragged into the boxes inside the black box.   At...
I have the following code:  c.m & 3 || (b |= 2,    65 <= a && 90 >= a ? a = 65 : 48 <= a && 57 >= a ? a = 48 : b & 1 ? 97 <= a && 122 >= a ? a = 65 : 197 == a || 229 == a ? b &= 5 : 192 <= a &...
I have an object menuNames which should maintain a list of menu items. If menuNames already has the slug, increment the value, if it doesnt contain the slug, set the value equal to 1. I'm doing this to track unique names. I want to end up with so...
With short circuiting you can prevent the evaluation of part of an expression:  let x = "", y = 123; x && alert("foo"); // "" y || alert("bar") // 123   Since the logical ops form expressions you can use them i...
I try to understand this one. It is an example from advanced javascript by John Resig.  function yell(n) {     return n > 0 ? yell(n-1) + "a" : "hiy"; } alert( yell(4) );   As a beginner I somehow would use a temporary variable to...
I’ve come across the situation multiple times that I call a function based on a binary situation where ternary would work fine:  buttonPressed ? files.audio.current.play() : files.audio.current.stop()   But see all that extra wasted code? Is there...
Can anyone explain to me what is the difference between these two statements and why the second one does not work and the first one does:   if (finalWord.length > 140) return false; else return finalWord; (finalWord.length > 140) ? false : fina...
I get unexpected result for this simple JavaScript assignment statement:  var t = 1 == 1 ? 1 : 0; undefined   I would have expected to get 1 assigned to v instead. Same result if you do  var t = (1 == 1 ? 1 : 0); undefined   Can somebody explain why...
What I want to do is check if there is element in array, if it is, I want to increment counter. Compiler reports error when I do count++ but not when I do count + 1, and it increments correctly. Is it because count++ is operation and not an expressio...

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