As you may know, in JavaScript '' + null = "null" and '' + undefined = "undefined" (in most browsers I can test: Firefox, Chrome and IE). I would like to know the origin of this oddity (what the heck was in the head on...
I have a text input as follows:  <input class="input-large" form="form" type="text" name="product_data[product]" id="product_description_product" value="{$product_data.product}" />   Unfortunately...
I have been given the two strings "str1" and "str2" and I need to join them into a single string. The result should be something like this: "String1, String 2". The "str1" and "str2" variables however do not ha...
I was comparing two branches and there is a divergence in code while the + operator, in my opinion it doesn't make any difference since it's push. Is there any difference?  Before  if (numberPattern.test(val)) {             var getNumbers = v...
how can i transfer the Value from Input 1 in 2 and add some letters?  <script type="text/javascript">  function doit(){ document.getElementById('input2').value=document.getElementById('input1').value; }  </script>...
Is there any way to concat a js function name?  right now I have this:  switch (playId) {         case "11":             play11();             break;         case "22":             play22();             break;         case "33"...
How can I combine this code with all single and double quotes as it should be. I have tried several combinations and I can't make it work. This one is my last try so please help.  What would be a good approach when working with long strings?  $ht...
What does the following evaluate to?   "1"+2+4   What about this:  5 + 4 + "3"   In the first case since "1" is a string, everything is a string, so the result is "124". In the second case, its 93.what is happening her...
In Javascript,  hello += ' world' // is shorthand for hello = hello + ' world'   Is there a shorthand operator for the opposite direction?  hello = ' world' + hello   I tried hello =+ ' world' but it did not work: it j...
myCoolObject {   a: 0   b: 12   c: 24 }   I want to concatenate a, b and c so that they look like a unique string "a-b-c" (or "0-12-24" in the example).  a, b and c will always represent numbers. Converting each one of them from int t...

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