30 lines
939 B
Markdown
30 lines
939 B
Markdown
---
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id: text-slice
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name: Text.slice
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category: text
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kind: namespace-method
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tokens: Text.slice
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sig: Text.slice(s, a, b) -> string
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tip: A substring covering bytes [a, b).
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order: 2
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ns: Text
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member: slice
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---
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Returns a fresh string of the bytes from index <code>a</code> up to but not including <code>b</code> — the half-open range <code>[a, b)</code>, so <code>Text.slice("hello world", 0, 5)</code> is <code>"hello"</code>. It is the call form of the <code>s[a..b]</code> slice syntax and allocates a new string. Use it to cut a fixed-width field, drop a prefix, or take the first few characters of a name.
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Parameters:
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- `s` — the source string
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- `a` — the start byte index (inclusive)
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- `b` — the end byte index (exclusive)
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```ludic
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program FirstWord {
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let line: string = "hello world"
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handler Split phase Update {
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let space = Text.index_of(line, " ") # 5
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let word = Text.slice(line, 0, space) # "hello"
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}
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}
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```
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