substr

将以下英文翻译为中文：

substr

https://gohugo.io/functions/substr/

Extracts parts of a string from a specified character’s position and returns the specified number of characters.

语法

substr STRING START [LENGTH]
strings.Substr STRING START [LENGTH]

It normally takes two parameters: start and length. It can also take one parameter: start, i.e. length is omitted, in which case the substring starting from start until the end of the string will be returned.

To extract characters from the end of the string, use a negative start number.

If length is given and is negative, that number of characters will be omitted from the end of string.

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{{ substr "abcdef" 0 }} → "abcdef"
{{ substr "abcdef" 1 }} → "bcdef"

{{ substr "abcdef" 0 1 }} → "a"
{{ substr "abcdef" 1 1 }} → "b"

{{ substr "abcdef" 0 -1 }} → "abcde"
{{ substr "abcdef" 1 -1 }} → "bcde"

{{ substr "abcdef" -1 }} → "f"
{{ substr "abcdef" -2 }} → "ef"

{{ substr "abcdef" -1 1 }} → "f"
{{ substr "abcdef" -2 1 }} → "e"

{{ substr "abcdef" -3 -1 }} → "de"
{{ substr "abcdef" -3 -2 }} → "d"

另请参阅

• anchorize
• emojify
• errorf and warnf
• float
• htmlEscape