compgen, eval, export, file: move to common (#6508)
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pages.zh/common/eval.md
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pages.zh/common/eval.md
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# eval
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> 在当前 shell 中以单个命令的形式执行参数,并返回其结果。
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> 更多信息:<https://ss64.com/osx/eval.html>.
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- 使用 'foo' 做为参数调用 `echo`:
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`eval "{{echo foo}}"`
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- 在当前 shell 程序中设置变量:
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`eval "{{foo=bar}}"`
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