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https://github.com/nushell/nushell
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add a split words command (#6363)
* add a split words command * changed regex
This commit is contained in:
Darren Schroeder
GitHub
parent
5a56d47f25
commit
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3 changed files with 324 additions and 0 deletions
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@ -184,6 +184,7 @@ pub fn create_default_context() -> EngineState {
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SplitChars,
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SplitColumn,
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SplitRow,
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SplitWords,
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Str,
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StrCamelCase,
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StrCapitalize,
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@ -3,9 +3,11 @@ pub mod column;
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pub mod command;
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pub mod list;
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pub mod row;
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pub mod words;
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pub use chars::SubCommand as SplitChars;
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pub use column::SubCommand as SplitColumn;
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pub use command::SplitCommand as Split;
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pub use list::SubCommand as SplitList;
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pub use row::SubCommand as SplitRow;
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pub use words::SubCommand as SplitWords;
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321
crates/nu-command/src/strings/split/words.rs
Normal file
321
crates/nu-command/src/strings/split/words.rs
Normal file
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@ -0,0 +1,321 @@
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use fancy_regex::Regex;
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use nu_engine::CallExt;
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use nu_protocol::{
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ast::Call,
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engine::{Command, EngineState, Stack},
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Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value,
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};
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"split words"
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}
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fn signature(&self) -> Signature {
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Signature::build("split words")
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.category(Category::Strings)
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// .switch(
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// "ignore-hyphenated",
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// "ignore hyphenated words, splitting at the hyphen",
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// Some('i'),
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// )
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// .switch(
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// "ignore-apostrophes",
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// "ignore apostrophes in words by removing them",
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// Some('a'),
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// )
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// .switch(
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// "ignore-punctuation",
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// "ignore punctuation around words by removing them",
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// Some('p'),
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// )
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.named(
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"min-word-length",
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SyntaxShape::Int,
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"The minimum word length",
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Some('l'),
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)
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}
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fn usage(&self) -> &str {
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"Split a string's words into separate rows"
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}
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fn search_terms(&self) -> Vec<&str> {
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vec!["word", "separate", "divide"]
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Split the string's words into separate rows",
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example: "'hello world' | split words",
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result: Some(Value::List {
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vals: vec![Value::test_string("hello"), Value::test_string("world")],
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span: Span::test_data(),
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}),
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},
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Example {
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description:
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"Split the string's words, of at least 3 characters, into separate rows",
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example: "'hello to the world' | split words -l 3",
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result: Some(Value::List {
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vals: vec![
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Value::test_string("hello"),
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Value::test_string("the"),
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Value::test_string("world"),
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],
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span: Span::test_data(),
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}),
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},
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]
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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split_words(engine_state, stack, call, input)
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}
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}
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fn split_words(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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let span = call.head;
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// let ignore_hyphenated = call.has_flag("ignore-hyphenated");
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// let ignore_apostrophes = call.has_flag("ignore-apostrophes");
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// let ignore_punctuation = call.has_flag("ignore-punctuation");
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let word_length: Option<usize> = call.get_flag(engine_state, stack, "min-word-length")?;
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input.flat_map(
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move |x| split_words_helper(&x, word_length, span),
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engine_state.ctrlc.clone(),
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)
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}
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fn split_words_helper(v: &Value, word_length: Option<usize>, span: Span) -> Vec<Value> {
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// There are some options here with this regex.
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// [^A-Za-z\'] = do not match uppercase or lowercase letters or apostrophes
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// [^[:alpha:]\'] = do not match any uppercase or lowercase letters or apostrophes
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// [^\p{L}\'] = do not match any unicode uppercase or lowercase letters or apostrophes
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// Let's go with the unicode one in hopes that it works on more than just ascii characters
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let regex_replace = Regex::new(r"[^\p{L}\']").expect("regular expression error");
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match v.span() {
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Ok(v_span) => {
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if let Ok(s) = v.as_string() {
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// let splits = s.unicode_words();
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// let words = trim_to_words(s);
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// let words: Vec<&str> = s.split_whitespace().collect();
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let replaced_string = regex_replace.replace_all(&s, " ").to_string();
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replaced_string
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.split(' ')
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.filter_map(|s| {
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if s.trim() != "" {
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if let Some(len) = word_length {
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if s.chars().count() >= len {
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Some(Value::string(s, v_span))
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} else {
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None
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}
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} else {
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Some(Value::string(s, v_span))
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}
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} else {
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None
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}
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})
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.collect()
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} else {
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vec![Value::Error {
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error: ShellError::PipelineMismatch("string".into(), span, v_span),
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}]
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}
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}
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Err(error) => vec![Value::Error { error }],
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}
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}
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// original at least 1 char long
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// curl -sL "https://www.gutenberg.org/files/11/11-0.txt" | tr '[:upper:]' '[:lower:]' | grep -oE "[a-z\']{1,}" | ^sort | ^uniq -c | ^sort -nr | head -n 10
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// benchmark INCLUDING DOWNLOAD: 1sec 253ms 91µs 511ns
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// 1839 the
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// 942 and
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// 811 to
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// 695 a
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// 638 of
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// 610 it
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// 553 she
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// 546 i
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// 486 you
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// 462 said
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// original at least 2 chars long
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// curl -sL "https://www.gutenberg.org/files/11/11-0.txt" | tr '[:upper:]' '[:lower:]' | grep -oE "[a-z\']{2,}" | ^sort | ^uniq -c | ^sort -nr | head -n 10
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// 1839 the
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// 942 and
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// 811 to
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// 638 of
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// 610 it
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// 553 she
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// 486 you
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// 462 said
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// 435 in
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// 403 alice
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// regex means, replace everything that is not A-Z or a-z or ' with a space
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// ❯ $contents | str replace "[^A-Za-z\']" " " -a | split row ' ' | where ($it | str length) > 1 | uniq -i -c | sort-by count --reverse | first 10
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// benchmark: 1sec 775ms 471µs 600ns
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// ╭───┬───────┬───────╮
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// │ # │ value │ count │
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// ├───┼───────┼───────┤
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// │ 0 │ the │ 1839 │
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// │ 1 │ and │ 942 │
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// │ 2 │ to │ 811 │
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// │ 3 │ of │ 638 │
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// │ 4 │ it │ 610 │
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// │ 5 │ she │ 553 │
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// │ 6 │ you │ 486 │
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// │ 7 │ said │ 462 │
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// │ 8 │ in │ 435 │
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// │ 9 │ alice │ 403 │
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// ╰───┴───────┴───────╯
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// $alice |str replace "[^A-Za-z\']" " " -a | split row ' ' | uniq -i -c | sort-by count --reverse | first 10
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// benchmark: 1sec 518ms 701µs 200ns
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// ╭───┬───────┬───────╮
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// │ # │ value │ count │
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// ├───┼───────┼───────┤
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// │ 0 │ the │ 1839 │
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// │ 1 │ and │ 942 │
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// │ 2 │ to │ 811 │
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// │ 3 │ a │ 695 │
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// │ 4 │ of │ 638 │
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// │ 5 │ it │ 610 │
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// │ 6 │ she │ 553 │
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// │ 7 │ i │ 546 │
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// │ 8 │ you │ 486 │
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// │ 9 │ said │ 462 │
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// ├───┼───────┼───────┤
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// │ # │ value │ count │
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// ╰───┴───────┴───────╯
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// s.unicode_words()
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// $alice | str downcase | split words | sort | uniq -c | sort-by count | reverse | first 10
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// benchmark: 4sec 965ms 285µs 800ns
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// ╭───┬───────┬───────╮
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// │ # │ value │ count │
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// ├───┼───────┼───────┤
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// │ 0 │ the │ 1839 │
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// │ 1 │ and │ 941 │
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// │ 2 │ to │ 811 │
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// │ 3 │ a │ 695 │
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// │ 4 │ of │ 638 │
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// │ 5 │ it │ 542 │
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// │ 6 │ she │ 538 │
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// │ 7 │ said │ 460 │
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// │ 8 │ in │ 434 │
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// │ 9 │ you │ 426 │
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// ├───┼───────┼───────┤
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// │ # │ value │ count │
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// ╰───┴───────┴───────╯
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// trim_to_words
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// benchmark: 5sec 992ms 76µs 200ns
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// ╭───┬───────┬───────╮
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// │ # │ value │ count │
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// ├───┼───────┼───────┤
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// │ 0 │ the │ 1829 │
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// │ 1 │ and │ 918 │
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// │ 2 │ to │ 801 │
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// │ 3 │ a │ 689 │
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// │ 4 │ of │ 632 │
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// │ 5 │ she │ 537 │
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// │ 6 │ it │ 493 │
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// │ 7 │ said │ 457 │
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// │ 8 │ in │ 430 │
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// │ 9 │ you │ 413 │
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// ├───┼───────┼───────┤
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// │ # │ value │ count │
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// ╰───┴───────┴───────╯
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// fn trim_to_words(content: String) -> std::vec::Vec<std::string::String> {
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// let content: Vec<String> = content
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// .to_lowercase()
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// .replace(&['-'][..], " ")
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// //should 's be replaced?
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// .replace("'s", "")
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// .replace(
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// &[
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// '(', ')', ',', '\"', '.', ';', ':', '=', '[', ']', '{', '}', '-', '_', '/', '\'',
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// '’', '?', '!', '“', '‘',
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// ][..],
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// "",
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// )
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// .split_whitespace()
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// .map(String::from)
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// .collect::<Vec<String>>();
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// content
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// }
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// split_whitespace()
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// benchmark: 9sec 379ms 790µs 900ns
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// ╭───┬───────┬───────╮
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// │ # │ value │ count │
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// ├───┼───────┼───────┤
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// │ 0 │ the │ 1683 │
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// │ 1 │ and │ 783 │
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// │ 2 │ to │ 778 │
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// │ 3 │ a │ 667 │
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// │ 4 │ of │ 605 │
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// │ 5 │ she │ 485 │
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// │ 6 │ said │ 416 │
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// │ 7 │ in │ 406 │
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// │ 8 │ it │ 357 │
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// │ 9 │ was │ 329 │
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// ├───┼───────┼───────┤
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// │ # │ value │ count │
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// ╰───┴───────┴───────╯
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// current
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// $alice | str downcase | split words | uniq -c | sort-by count --reverse | first 10
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// benchmark: 1sec 481ms 604µs 700ns
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// ╭───┬───────┬───────╮
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// │ # │ value │ count │
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// ├───┼───────┼───────┤
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// │ 0 │ the │ 1839 │
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// │ 1 │ and │ 942 │
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// │ 2 │ to │ 811 │
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// │ 3 │ a │ 695 │
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// │ 4 │ of │ 638 │
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// │ 5 │ it │ 610 │
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// │ 6 │ she │ 553 │
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// │ 7 │ i │ 546 │
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// │ 8 │ you │ 486 │
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// │ 9 │ said │ 462 │
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// ├───┼───────┼───────┤
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// │ # │ value │ count │
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// ╰───┴───────┴───────╯
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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}
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