forked from extern/nushell
54 lines
1.1 KiB
Rust
54 lines
1.1 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::context::CommandRegistry;
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use crate::prelude::*;
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Value};
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use rand::seq::SliceRandom;
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use rand::thread_rng;
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pub struct Shuffle;
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#[async_trait]
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impl WholeStreamCommand for Shuffle {
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fn name(&self) -> &str {
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"shuffle"
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}
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fn usage(&self) -> &str {
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"Shuffle rows randomly."
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}
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async fn run(
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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shuffle(args, registry).await
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}
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}
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async fn shuffle(
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args: CommandArgs,
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_registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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let input = args.input;
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let mut values: Vec<Value> = input.collect().await;
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values.shuffle(&mut thread_rng());
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Ok(futures::stream::iter(values.into_iter().map(ReturnSuccess::value)).to_output_stream())
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}
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#[cfg(test)]
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mod tests {
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use super::Shuffle;
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#[test]
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fn examples_work_as_expected() {
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use crate::examples::test as test_examples;
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test_examples(Shuffle {})
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}
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}
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