parseFloat("NaN")   returns "NaN", but  parseFloat("NaN") == "NaN"   returns false. Now, that's probably a good thing that it does return false, but I don't understand how this is so. Did the JavaScript creat...

I know that  parseInt(myString, 10) // "Never forget the radix"     will return a number if the first characters in the string are numerical, but how can I do this in JavaScript if I have a string like "column5" and want to increment...

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I am trying to pull a number (72157648141531978), which starts at the 21st character, out of the title of a page like so:    parseInt(document.title.substring(21), 10);     This returns the string as an integer of 72157648141531980. I can't seem...

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<div style="left: 100%"></div>  parseInt($("div").css("left"), 10);   When I try to get value of left, some browsers give result in pixels, some in %.  Here is an example http://jsfiddle.net/WTt4s/1/  Google Chrome...

I made a form where the user inputs values for width and height that they want for the pop up window to be. I am using window.open for  that.   So I think I need to check if the values for width and height are integer. I have a function that checks t...

Consider the following:  parseInt(new Array(), 10); // -> NaN parseInt(new Array(), 16); // -> NaN  parseInt(new Error(), 10); // -> NaN parseInt(new Error(), 16); // -> 14   It seems this behavior is unique to Error/instances of Error....

today I stumbled on a strange (in my opinion) case in JavaScript. I passed a non-hexadecimal string to the parseInt function with the base of 16 and...I got the result. I would expect the function to throw some kind of exception or at least return Na...

I've always used the parseInt() function in Javascript without passing the radix parameter. As per the MDN documentation here, it's stated that not providing this parameter may result in unpredictable behaviour.     Always specify this parame...