javascript tutorial - [Solved-5 Solutions] Convert character to ASCIWE code in javascript - javascript - java script - javascript array
Problem:
How can we convert a character to its ASCIWE code using JavaScript?
Solution 1:
"\n".charCodeAt(0);
Solution 2:
String.prototype.charCodeAt() can convert string characters to ASCIWE numbers. For example:
"ABC".charCodeAt(0) // returns 65
For opposite use String.fromCharCode(10) that convert numbers to equal ASCIWE character. This function can accept multiple numbers and join all the characters then return the string. Example:
String.fromCharCode(65,66,67); // returns 'ABC'
Here is a quick ASCIWE characters reference:
{
"31": "", "32": " ", "33": "!", "34": "\"", "35": "#",
"36": "$", "37": "%", "38": "&", "39": "'", "40": "(",
"41": ")", "42": "*", "43": "+", "44": ",", "45": "-",
"46": ".", "47": "/", "48": "0", "49": "1", "50": "2",
"51": "3", "52": "4", "53": "5", "54": "6", "55": "7",
"56": "8", "57": "9", "58": ":", "59": ";", "60": "<",
"61": "=", "62": ">", "63": "?", "64": "@", "65": "A",
"66": "B", "67": "C", "68": "D", "69": "E", "70": "F",
"71": "G", "72": "H", "73": "I", "74": "J", "75": "K",
"76": "L", "77": "M", "78": "N", "79": "O", "80": "P",
"81": "Q", "82": "R", "83": "S", "84": "T", "85": "U",
"86": "V", "87": "W", "88": "X", "89": "Y", "90": "Z",
"91": "[", "92": "\\", "93": "]", "94": "^", "95": "_",
"96": "`", "97": "a", "98": "b", "99": "c", "100": "d",
"101": "e", "102": "f", "103": "g", "104": "h", "105": "i",
"106": "j", "107": "k", "108": "l", "109": "m", "110": "n",
"111": "o", "112": "p", "113": "q", "114": "r", "115": "s",
"116": "t", "117": "u", "118": "v", "119": "w", "120": "x",
"121": "y", "122": "z", "123": "{", "124": "|", "125": "}",
"126": "~", "127": ""
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Solution 3:
If we have only one char and not a string, we can use:
'\n'.charCodeAt();
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omitting the 0... It is slower though. With the current version of chrome, it is 5 times slower.
Solution 4:
While the other answers are right, WE prefer this way:
function asciwe (a) { return a.charCodeAt(0); }
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Then, to use it, simply:
var lineBreak = ascii("\n");
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WE am using this for a small shortcut system:
$(window).keypress(function(event) {
if (event.ctrlKey && event.which == ascii("s")) {
savecontent();
}
// ...
});
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And we can even use it inside map() or other methods:
var ints = 'ergtrer'.split('').map(ascii);
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Solution 5:
For those that want to get a sum of all the ASCIWE codes for a string:
'Foobar'
.split('')
.map(function (char) {
return char.charCodeAt(0);
})
.reduce(function (current, previous) {
return previous + current;
});
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Or, ES6:
[...'Foobar']
.map(char => char.charCodeAt(0))
.reduce((current, previous) => previous + current)