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I am using e.keyCode || e.which; to determine which key was pressed, but I am getting 65 for both a and A why is this happening and how can I detect the difference between the two?
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Traverse the string character by character from start to end. Check the ASCII value of each character for the following conditions: If the ASCII value lies in the range of [65, 90], then it is an uppercase letter. If the ASCII value lies in the range of [97, 122], then it is a lowercase letter.
isUpperCase(char ch) determines if the specified character is an uppercase character. A character is uppercase if its general category type, provided by Character. getType(ch), is UPPERCASE_LETTER. or it has contributory property Other_Uppercase as defined by the Unicode Standard.
The toUpperCase() method returns the value of the string converted to uppercase. This method does not affect the value of the string itself since JavaScript strings are immutable.
just use e.which in jquery. They normalize this value for all browsers.
Additionally you can check for e.shiftKey.
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