What is collation
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Collation is used for sorting a set of strings and searching within a set of strings. It is parameterized by locale and aware of Unicode. Let’s take comparison and sorting features,
Comparison:
var list = [“ä”, “a”, “z”]; // In German, “ä” sorts with “a” Whereas in Swedish, “ä” sorts after “z”
var l10nDE = new Intl.Collator(“de”);
var l10nSV = new Intl.Collator(“sv”);
console.log(l10nDE.compare(“ä”, “z”) === -1); // true
console.log(l10nSV.compare(“ä”, “z”) === +1); // true
Sorting:
var list = [“ä”, “a”, “z”]; // In German, “ä” sorts with “a” Whereas in Swedish, “ä” sorts after “z”
var l10nDE = new Intl.Collator(“de”);
var l10nSV = new Intl.Collator(“sv”);
console.log(list.sort(l10nDE.compare)); // [ “a”, “ä”, “z” ]
console.log(list.sort(l10nSV.compare)); // [ “a”, “z”, “ä” ]