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両者が文字列の場合は、Unicode値による比較。
文字列 文字列 ＝＞ Unicode値 Unnicode値
両者が文字列でない場合は、非数値型を数値に変換し比較。
＜ 変換仕様 ＞
true -> 1
false -> 0
null -> 0
"数値" -> 数値 （ "5" -> 5 ）
"数値でない文字列" -> NaN （ "p5" -> NaN ）
undefined -> NaN
いずれかの値が NaN の場合、演算子は false を返す。
片方がBigInt型の場合も比較可能。
"5" < 7n ＝＞ true
5n < 3 ＝＞ false
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ymrl、Masanobu Naruse, Takeshi Kano, Junichi Ito, uhyo, Hiroshi Tokumaru, MinoDriven, Minorun, Hiroyuki Sakuraba, tenntenn, drken, konifar
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