charcodeat

Why do you think that '1'.charCodeAt() and then subtracting 1 is more appropriate and logical than Number('1') and then subtracting 1?

String.prototype.charCodeAt and String.fromCharCode are never called in implicit type conversion.

• Regular indexing (also charAt and charCodeAt) is by UTF-16 code unit and produces UTF-16 code units.

For single-character indexOf, it's much faster and much more efficient to match the character code (loop and check charCodeAt) than to use the function form 3) avoid lastIndexOf.

The interface provides methods charAt, charCodeAt, concat and substring, so it functions as a drop-in replacement for JavaScript strings (provided you limit your use to the given supported methods).

I understand that use case, but in my opinion it would be much cleaner (and speculating faster) to have an 256-slot array...and routing with opcodes[byte.charCodeAt(0)](); or something similar.

Line Number 42, Column 101:String.fromCharCode(0xdc00+n%0x400);}else{return '&#'+ncr+';'}});for(var i=body.length-1;i>0;i--){if(cp1252[body.charCodeAt(i)]){body=body.substr(0,i)+'&#'+cp1252[body.charCodeAt(i)]+';'+body.substr(i+1);}} ----------------------------------------------------------------------------------------------------^ But seriously, I'm curious what he has to say.

> outer: for (var i = 0, j = 0; i < nlen; i++) { > var nch = needle.charCodeAt(i); > while (j < hlen) { > if (haystack.charCodeAt(j++) === nch) { > continue outer; > } > } Oh my god, you can label loops?

And when you consider that, you are way past any "native" except when it comes to special snowflakes like charCodeAt, the math functions and such.

A simplified example: I can `.charCodeAt` a string all I want but I'll never get a negative number, so I can safely use -1 to mean something special in the transformed sequence of "tokens".

This JS "library" contains one function: > function fuzzysearch(r,e){var n=e.length,t=r.length;if(t>n)return!1;if(t===n)return r===e;r:for(var f=0,u=0;t>f;f++){for(var a=r.charCodeAt(f);n>u;)if(e.charCodeAt(u++)===a)continue r;return!1}return!0} I mean..

(Also tried in Chrome's JS terminal "<paste string>".split("").map(function(s) { return s.charCodeAt(0); }) ) It's quite probable I don't know what I'm doing, so I'd appreciate knowing how to do it properly.