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String.fromCharCode issue for special characters in javascript

由 Deadly 提交于 2021-02-05 11:50:24
问题 Below code accepts a character and prints character using keycode(String.fromCharCode). Issue arises when you enter special character like . or ? . function logChar(e){ var keyCode = e.which || e.keyCode; var char = String.fromCharCode(keyCode); console.log(char) } <input type="text" onkeydown="logChar(event)" /> Can someone explain why is it returning different value and how to get same value? Thanks in advance! 回答1: That's because keyCode and charCode are different. String.fromCharCode

php equivlent of fromCharCode?

由 依然范特西╮ 提交于 2019-12-29 06:25:45
问题 Is there a PHP function that takes an integer and return the unicode character of that number? 回答1: No, but you can easily make one: <?php /** * Return unicode char by its code * * @param int $u * @return char */ function unichr($u) { return mb_convert_encoding('&#' . intval($u) . ';', 'UTF-8', 'HTML-ENTITIES'); } ?> Taken from: PHP Manual - chr - comments 回答2: Look at this: http://php.net/manual/en/function.utf8-encode.php 来源： https://stackoverflow.com/questions/9878483/php-equivlent-of

Can I pass an array into fromCharCode

由 爱⌒轻易说出口 提交于 2019-12-29 03:53:07
问题 I might be asking the wrong question here, so I apologize if the answer is on another thread... but I've looked around to no avail. in a snippet, why doesn't this work? array = [72,69,76,76,79]; document.write(String.fromCharCode(array)); I'm collecting key events in an array and want to be able to write them out as chars when prompted. And though this works: document.write(String.fromCharCode(72,69,76,76,79)); I can't seem to get it to work when I pass it along as an array. I've also tried

VBScript chr() appears to return wrong value

由 ＊爱你＆永不变心＊ 提交于 2019-12-10 18:39:33
问题 I'm trying to convert a character code to a character with chr(), but VBScript isn't giving me the value I expect. According to VBScript, character code 199 is: � However, when using something like Javascript's String.fromCharCode, 199 is: Ç The second result is what I need to get out of VBScript's chr() function. Any idea what the problem is? 回答1: Edited to reflect comments Chr(199) returns a 2-byte character, which is being interpreted as 2 separate characters. use ChrW(199) to return a

string.replace(fromCharCode() , '') cannot replace characters

由 爱⌒轻易说出口 提交于 2019-12-10 17:11:23
问题 When I parse the XML, it contains abnormal hex characters. So I tried to replace it with empty space. But it doesn't work at all. Original character : � hex code : (253, 255) code : xmlData = String.replace(String.fromCharCode(253,255)," "); retrun xmlData; I'd like to remove "ýÿ" characters from description. Is there anyone who have a trouble with replacing hex character to empty space? Based on the answers, I've modified the code as follows: testData = String.fromCharCode(253,255); xmlData

JavaScript Key Codes

由 走远了吗. 提交于 2019-12-07 18:35:20
问题 I'm working with a JavaScript routine I didn't write. It is called from a text box's onkeydown attribute to prevent unwanted keystrokes. The first argument is apparently not used. The second argument is a list of characters that should be allowed. function RestrictChars(evt, chars) { var key; var keychar; if (window.event) key = window.event.keyCode; else if (e) key = e.which; else return true; keychar = String.fromCharCode(key); if ((key == null) || (key == 0) || (key == 8) || (key == 9) ||

JavaScript Key Codes

由 谁都会走 提交于 2019-12-06 08:30:35
I'm working with a JavaScript routine I didn't write. It is called from a text box's onkeydown attribute to prevent unwanted keystrokes. The first argument is apparently not used. The second argument is a list of characters that should be allowed. function RestrictChars(evt, chars) { var key; var keychar; if (window.event) key = window.event.keyCode; else if (e) key = e.which; else return true; keychar = String.fromCharCode(key); if ((key == null) || (key == 0) || (key == 8) || (key == 9) || (key == 13) || (key == 27)) // Control key return true; else if (((chars).indexOf(keychar) > -1))

array join function not working

由 亡梦爱人 提交于 2019-12-01 07:37:46
for some reason Im not able to see why my array join method wont work. here's the quick code for review: function rot13(str) { // LBH QVQ VG! var strAry = str.split(''); var transformed = strAry.map(function(val){ if(val === " ") return " "; else{ var code = val.charCodeAt(0); return String.fromCharCode(code-13); } }); transformed.join(''); console.log(transformed); return transformed; } // Change the inputs below to test rot13("SERR PBQR PNZC"); The idea is to pass in the string and it will be converted to a readable code string, but the join is not working. Also, a few of the digits are not

array join function not working

由 十年热恋 提交于 2019-12-01 04:34:00
问题 for some reason Im not able to see why my array join method wont work. here's the quick code for review: function rot13(str) { // LBH QVQ VG! var strAry = str.split(''); var transformed = strAry.map(function(val){ if(val === " ") return " "; else{ var code = val.charCodeAt(0); return String.fromCharCode(code-13); } }); transformed.join(''); console.log(transformed); return transformed; } // Change the inputs below to test rot13("SERR PBQR PNZC"); The idea is to pass in the string and it will

Javascript String.fromCharCode Case Sensitivity?

由 你离开我真会死。 提交于 2019-11-30 21:45:14
问题 I am simply listening for a keyup event of an input element and gather the results into a string like so word=word+String.fromCharCode(key.keyCode); The problem is that the word is in capital letters while I want it to be case-sensitive. For example if I type abcef my accumulated word becomes 'ABCEF' . Note - I need a pure javascript solution (no libraries..) Any thoughts? 回答1: Events like keyup and keydown will return 65 for both a and A (and also true for event.shiftKey if that key is held
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