forked from extern/nushell
8bd68416e3
* lazyframe definition * expressions and lazy frames * new alias expression * more expression commands * updated to polars main * more expressions and groupby * more expressions, fetch and sort-by * csv reader * removed open csv * unique function * joining functions * join lazy frames commands with eager commands * corrected tests * Update .gitignore * Update .gitignore Co-authored-by: JT <547158+jntrnr@users.noreply.github.com>
16 lines
500 B
Rust
16 lines
500 B
Rust
use nu_protocol::{FromValue, ShellError, Value};
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pub fn extract_strings(value: Value) -> Result<Vec<String>, ShellError> {
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match (
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<String as FromValue>::from_value(&value),
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<Vec<String> as FromValue>::from_value(&value),
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) {
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(Ok(col), Err(_)) => Ok(vec![col]),
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(Err(_), Ok(cols)) => Ok(cols),
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_ => Err(ShellError::IncompatibleParametersSingle(
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"Expected a string or list of strings".into(),
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value.span()?,
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)),
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}
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}
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