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/*jshint node:true*/

"use strict";

require("unorm");

// Function to display Unicode codepoints of a string.

function codepoints(string) {

return string.split("").map(function(chr) {

var codepoint = chr.charCodeAt(0);

return (codepoint >= 33 && codepoint <= 126) ?

JSON.stringify(chr) :

"U+" + codepoint.toString(16).toUpperCase();

}).join(" ");

}

// Scientific Ångström symbol is converted to Scandinavian letter Å.

var angstrom = "\u212B";

console.log("- Example 1 -");

console.log(codepoints(angstrom));

console.log(codepoints(angstrom.normalize("NFC")));

// German ä and ü decomposed into a and u with Combining Diaeresis character.

var letters = "\u00E4\u00FC";

console.log("- Example 2 -");

console.log(codepoints(letters));

console.log(codepoints(letters.normalize("NFD")));

// String optimized for compatibility, ie. CO₂ becomes CO2.

var scientific = "CO\u2082 and E=mc\u00B2";

console.log("- Example 3 -");

console.log(scientific);

console.log(scientific.normalize("NFKC"));

// NOTE: Rest of the example requires XRegExp: npm install xregexp

// Remove combining characters / marks from Swedish name, ie. ö becomes o.

// This is useful for indexing and searching internationalized text.

try {

var xregexp = require("xregexp").XRegExp;

var name = "\u00C5ngstr\u00F6m";

console.log("- Example 4 -");

console.log(name.normalize("NFKD"));

console.log(name.normalize("NFKD").replace(xregexp("\\p{M}", "g"), ""));

} catch (ex) {}