Develop Reference

Special unicode string splitting in Javascript [duplicate]

First off I been searching the web for this solution.
How to:
<''.split('');
> ['','','']
Simply express of what I'll like to do. But also with other Unicode characters like poo.

As explained in JavaScript has a Unicode problem, in ES6 you can do this quite easily by using the new ... spread operator. This causes the string iterator (another new ES6 feature) to be used internally, and because that iterator is designed to deal with code points rather than UCS-2/UTF-16 code units, it works the way you want:
console.log([...'💩💩']);
// → ['💩', '💩']
Try it out here: https://babeljs.io/repl/#?experimental=true&evaluate=true&loose=false&spec=false&code=console.log%28%0A%20%20%5B%2e%2e%2e%27%F0%9F%92%A9%F0%9F%92%A9%27%5D%0A%29%3B
A more generic solution:
function splitStringByCodePoint(string) {
return [...string];
}
console.log(splitStringByCodePoint('💩💩'));
// → ['💩', '💩']

for ... of could loop through string contains unicode characters,
let string = "😀😃😄😁😆😅🤣😂🙂🙃😉😊😇"
for(var c of string)
console.log(c);

The above solutions work well for simple emojis, but not for the one from an extended set and the ones that use Surrogate Pairs
For example:
splitStringByCodePoint("❤️")
// Returns: [ "❤", "️" ]
To handle these cases properly you'll need a purpose-built library, like for example:
https://github.com/dotcypress/runes
https://github.com/essdot/spliddit

Translate javascript string replace function to php

I found in this site a very basic javascript function to encode text. Looking at the source code this is the string replacement code:
txtEscape = txtEscape.replace(/%/g,'#');
So the string stackoverflow becomes #73#74#61#63#6B#6F#76#65#72#66#6C#6F#77
I need a function that does the same elementary encryption in php, but I really don't understand what the /%/g does. I think in php the same function would be something like:
str_replace(/%/g,"#","stackoverflow");
But of course the /%/g doesn't work

Replace a character
Indeed, the PHP function is str_replace (there are many functions for replacements). But, the regex expression is not the same :)
See official documentation: http://php.net/manual/en/function.str-replace.php
In your case, you want to replace a letter % by #.
g is a regex flag. And // are delimiter to activate the regex mode :)
The "g" flag indicates that the regular expression should be tested against all possible matches in a string. Without the g flag, it'll only test for the first.
<?php
echo str_replace('%', '#', '%73%74%61%63%6B%6F%76%65%72%66%6C%6F%77');
?>
In PHP, you can use flags with regex: preg_replace & cie.
Escape
See this post: PHP equivalent for javascript escape/unescape
There are two functions stringToHex and hexToString to do what you want :)
Indeed, the site you provided use espace function to code the message:
document.write(unescape(str.replace(/#/g,'%')));

String Split With Unicode

First off I been searching the web for this solution.
How to:
<''.split('');
> ['','','']
Simply express of what I'll like to do. But also with other Unicode characters like poo.

As explained in JavaScript has a Unicode problem, in ES6 you can do this quite easily by using the new ... spread operator. This causes the string iterator (another new ES6 feature) to be used internally, and because that iterator is designed to deal with code points rather than UCS-2/UTF-16 code units, it works the way you want:
console.log([...'💩💩']);
// → ['💩', '💩']
Try it out here: https://babeljs.io/repl/#?experimental=true&evaluate=true&loose=false&spec=false&code=console.log%28%0A%20%20%5B%2e%2e%2e%27%F0%9F%92%A9%F0%9F%92%A9%27%5D%0A%29%3B
A more generic solution:
function splitStringByCodePoint(string) {
return [...string];
}
console.log(splitStringByCodePoint('💩💩'));
// → ['💩', '💩']

for ... of could loop through string contains unicode characters,
let string = "😀😃😄😁😆😅🤣😂🙂🙃😉😊😇"
for(var c of string)
console.log(c);

The above solutions work well for simple emojis, but not for the one from an extended set and the ones that use Surrogate Pairs
For example:
splitStringByCodePoint("❤️")
// Returns: [ "❤", "️" ]
To handle these cases properly you'll need a purpose-built library, like for example:
https://github.com/dotcypress/runes
https://github.com/essdot/spliddit

How can I get wanted part from string with regular expression

I have a string like #'test'
and I have to get only test word without #' '
how can I match them with regular expression at javascript?

try the regex below:
#\'([^']*)\'
get group(1)
and if your language supports look-behind,( e.g. python, perl, java...):
(?<=#\')[^']*
should work too without grouping.
oh, just saw you edit your question, as far as I know, js doesn't support look-behind, then you could take the option 1.

var firsName= "#'test'"
var objName = firsName .replace('#', "'");
lastName=objName.replace(/[']/g,'');
I fixed it like that. I dont know is it best way or not. thanks for helping

Javascript equivalent to php's urldecode()

I wrote a custom xml parser and its locking up on special characters. So naturally I urlencoded them into my database.
I can't seem to find an equivalent to php's urldecode().
Are there any extentions for jquery or javascript that can accomplish this?

You could use the decodeURIComponent function to convert the %xx into characters. However, to convert + into spaces you need to replace them in an extra step.
function urldecode(url) {
return decodeURIComponent(url.replace(/\+/g, ' '));
}

Check out this one
function urldecode (str) {
return decodeURIComponent((str + '').replace(/\+/g, '%20'));
}

I think you need the decodeURI function.