Baseline Widely available
ãã¯ãªã¡ã³ãæ¼ç®å (--
) ã¯ããªãã©ã³ãããã¯ãªã¡ã³ã (1 ãæ¸ç®) ãã¦å¤ãè¿ãã¾ãã
let x = 3;
const y = x--;
console.log(`x:${x}, y:${y}`);
// Expected output: "x:2, y:3"
let a = 3;
const b = --a;
console.log(`a:${a}, b:${b}`);
// Expected output: "a:2, b:2"
æ§æ 解説
ãªãã©ã³ãã«å¾ç½®ã§æ¼ç®åãä»ãã㨠(ä¾ãã° x--
)ããã¯ãªã¡ã³ãæ¼ç®åã¯ãã¯ãªã¡ã³ããã¾ããããã¯ãªã¡ã³ãåã®å¤ãè¿ãã¾ãã
ãªãã©ã³ãã«åç½®ã§æ¼ç®åãä»ãã㨠(ä¾ãã° --x
)ããã¯ãªã¡ã³ãæ¼ç®åã¯ãã¯ãªã¡ã³ããããã¯ãªã¡ã³ãå¾ã®å¤ãè¿ãã¾ãã
let x = 3;
y = x--;
// y = 3
// x = 2
åç½®ãã¯ãªã¡ã³ã
let a = 2;
b = --a;
// a = 1
// b = 1
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