I know that I can write a simple loop to check each character in a string and see if it is a alphanumeric character. If it is one, concat it to a new string. And thats it.
But, is there a more elegant shortcut to do so. I have a string (with CSS selectors to be precise) and I need to extract only alphanumeric characters from that string.
Many ways to do it, basic regular expression with replace
var str = "123^&*^&*^asdasdsad";
var clean = str.replace(/[^0-9A-Z]+/gi,"");
console.log(str);
console.log(clean);
\d is probably better than 0-9
"sdfasfasdf1 yx6fg4 { df6gjn0 } yx".match(/([0-9a-zA-Z ])/g).join("")
where sdfasfasdf1 yx6fg4 { df6gjn0 } yx can be replaced by string variable. For example
var input = "hello { font-size: 14px }";
console.log(input.match(/([0-9a-zA-Z ])/g).join(""))
You can also create a custom method on string for that. Include into your project on start this
String.prototype.alphanumeric = function () {
return this.match(/([0-9a-zA-Z ])/g).join("");
}
then you can everythink in your project call just
var input = "hello { font-size: 14px }";
console.log(input.alphanumeric());
or directly
"sdfasfasdf1 yx6fg4 { df6gjn0 } yx".alphanumeric()
var NewString = (OldString).replace(/([^0-9a-z])/ig, "");
where OldString is the string you want to remove the non-alphanumeric characters from
