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std/fmt ​

String formatting and padding utilities.

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from "std/fmt" import { fmt1, fmt2, join, padLeft, zeroPad }

Functions ​

fmt1 ​

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fn fmt1(template: &string, a: &string): string

Replaces the first {} in template with a.

fmt2 ​

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fn fmt2(template: &string, a: &string, b: &string): string

Replaces the first two {} placeholders with a and b.

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let msg = fmt2(&"Hello, {}! You have {} messages.", &name, &intToString(count))
// "Hello, Alice! You have 3 messages."

fmt3 ​

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fn fmt3(template: &string, a: &string, b: &string, c: &string): string

Replaces the first three {} placeholders.

fmt4 ​

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fn fmt4(template: &string, a: &string, b: &string, c: &string, d: &string): string

Replaces the first four {} placeholders.

padLeft ​

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fn padLeft(s: &string, width: i64, fill: u8): string

Pads s on the left with fill until it reaches width.

padRight ​

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fn padRight(s: &string, width: i64, fill: u8): string

Pads s on the right with fill until it reaches width.

zeroPad ​

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fn zeroPad(n: i64, width: i64): string

Formats integer n as a string, zero-padded to width digits.

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let s = zeroPad(42, 5)
// "00042"

join ​

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fn join(parts: &Vec<string>, separator: &string): string

Joins all strings in parts with separator between them.

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let csv = join(&names, &", ")