22 lines
622 B
Markdown
22 lines
622 B
Markdown
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title = 2025-01-06
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author = ["SouthFox"]
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date = 2025-01-06T23:33:00+08:00
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lastmod = 2025-01-06T23:45:53+08:00
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tags = ["publish"]
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draft = false
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+++
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## Hy {#hy}
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[API reference — Hy 1.0.0 manual](https://hylang.org/hy/doc/v1.0.0/api#for)
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[hy]({{< relref "../main/20250106234212-hy.md" >}}) 里 `for` 里能引用之前的标识符，达到 `python` 里用多个 `for` 循环能表达同样的效果。
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```hy
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(for [[root dirs files] (os.walk "source")
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-file files]
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(let [file (os.path.join root -file)]
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(when (and (in "posts" file) (file.endswith ".md"))
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(markdown-files.append file))))
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```
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