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Purpose of -1 in String.fromCharCode(k)

javascript,fromcharcode

You got the order of execution wrong. First this expression is evaluated: String.fromCharCode(k). Lets assume that the result is the string "b". That is used in the expression: AllowableCharacters.indexOf("b"). Lets assume that the characer is found at the second character in the string, which has index 1, so the result...

Convert array with 8bit value to string with char (no charcode)

javascript,arraybuffer,fromcharcode

return Array.prototype.join.call (view, function() {String.fromCharCode(this)}); But this is crap. Obviously, since Array::join does not take a callback to transform each element but only the separator by which the elements should be joined. Instead, to transform every element before joining them you would use Array::map: return Array.prototype.map.call(view, function(charcode) { return...

Block typing in any other alphabet than english

javascript,validation,ascii,fromcharcode

I use this function to remove special characters from input function removeSpecials(evt) { var input = document.getElementById("myinput"); var patt = /[^\u0000-\u007F ]+/; setTimeout(function() { var value = input.value; input.value = value.replace(patt,""); },100); } The point is: I create a pattern to detect all special characters var patt = /[^\u0000-\u007F ]+/;;...