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                                            lisa chen

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JS基础测试37期

1. ```js bankCode.replace(/(\d{4})(?=(\d)+$)/g,'$1 '); ``` 2. ```js Number(numberCode).toLocaleString() ``` ```js numberCode.replace(/(\d)(?=(\d{3})+$)/g,'$1,'); ``` 3. ```js function filesSizeFormat(size) { let k = size / 1024, m = k / 1024, g =...