摘要：
function flipCoin(): "heads" | "tails" { if (Math.random() > 0.5) return "heads" return "tails" } function maybeGetUserInfo(): | ["error", Error] | [" 阅读全文
posted @ 2022-07-26 14:50
Zhentiw
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摘要：
1. const values = [3, "14", [21]] for (let a in values) { // ^? } for (let b of values) { // ^? } . . . . Answer: for...in loop: The for...in statemen 阅读全文
posted @ 2022-07-26 14:24
Zhentiw
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