e90b099622
Simplifies the signature, makes it more flexible. Detected a few unnecessary allocations in the process.
33 lines
778 B
Rust
33 lines
778 B
Rust
use nu_protocol::Value;
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use std::collections::HashSet;
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pub fn get_columns(input: &[Value]) -> Vec<String> {
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let mut columns = vec![];
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for item in input {
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let Value::Record { val, .. } = item else {
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return vec![];
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};
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for col in &val.cols {
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if !columns.contains(col) {
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columns.push(col.to_string());
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}
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}
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}
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columns
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}
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// If a column doesn't exist in the input, return it.
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pub fn nonexistent_column(inputs: &[String], columns: &[String]) -> Option<String> {
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let set: HashSet<String> = HashSet::from_iter(columns.iter().cloned());
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for input in inputs {
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if set.contains(input) {
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continue;
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}
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return Some(input.clone());
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}
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None
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}
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