JSのNumberについて
Numbers in javascript
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NumberES2016~2018穗גjavascriptך侧⦼㘗חְֻאַ㢌⻉ָ֮ךדך鑧
Variations- 侭侧- 㼭侧- 16鹌侧- 8鹌侧- 2鹌侧- Bigint- Separator
侭侧64bitתדך侭侧䪔ִⰻ鿇涸חכ㹋鄲⣛㶷ָ31bit侭侧ה64bit Doubleדⴽגְծ64bit Doubleך
㼭侧㼭侧挿הֻח鎉ֲֿהזְָծⰻ鿇涸חכ64bit DoubleדⳢ椚ׁזךד鎘皾穠卓כ鵚⡂⦼חז
16鹌侧0xדכׄת侧⦼CSSהַדֶזׄ
8鹌侧0oדכׄתַ0~ד7⟃♳ך侧⦼ָזְ㜥さח8鹌侧חזؿ؋؎ٕػ٦ىحءّٝהַדֶזׄ
// 8進数!0o777!!// 暗黙の8進数0777!!// 0から始まる10進数0778!!"use strict";!0777 // Error!!
2鹌侧0bַ㨣ת0ה1ך⢪欽〳腉זٔذٕٓ
// 2進数!0b11101101 // 237!
BigInt64bit⟃♳ך侧⦼䪔ֲ㜥さח⢪ֲ植㖈Stage3侧⦼ٔذٕٓך䖓ח n אֽֿהדBigIntٔذٕٓ邌植ׅկHexװOctalٔذٕٓ؟ه٦زկ侧⦼ٔذٕٓהずֻׄn劣㽵חאֽֿהדBigIntחזկ(׃ծOctalכ0oXXX䕎䒭ך)תծtypeof כ 'bigint'ָ䨱կ
// Bigint!10n + 10n // 20n!10n + 10 // Error!typeof 10n // 'bigint'!BigInt('100') // 100n!
BigInt鑫׃ֻכhttps://speakerdeck.com/brn/ecmascript-bigintח剅ְ
Separator植㖈Stage3תmergeׁגְזְָV8ח㹋鄲׃גךֲ⢪ִ״ֲחזծ✮㹀
// Numeric Separators!1_0_0_0_0!0xFF_FF_FF!0b1000_1111_0000!0o7_7_7!!1__0 // Error!1000_ // Error!
׀幠耮ָ֮הֲ׀ְׂת׃