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Improve documentation for each command (#15172)

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# Description

It is a rework of https://github.com/nushell/nushell.github.io/pull/1819

So, I was wasting time looking for equivalent of `filter_map` in Nu,
unaware that `each` already has it. This PR is to make it clear in the
documentation, saving other user's time.

# User-Facing Changes

No

# Tests + Formatting

No

# After Submitting

No
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Nguyễn Hồng Quân 2025-02-25 17:01:09 +07:00 committed by GitHub
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crates/nu-command/src/filters/each.rs
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@ -20,7 +20,7 @@ iterate over each record, not necessarily each cell within it.
Avoid passing single records to this command. Since a record is a Avoid passing single records to this command. Since a record is a
one-row structure, 'each' will only run once, behaving similar to 'do'. one-row structure, 'each' will only run once, behaving similar to 'do'.
To iterate over a record's values, try converting it to a table To iterate over a record's values, use 'items' or try converting it to a table
with 'transpose' first."# with 'transpose' first."#
} }
@ -70,7 +70,7 @@ with 'transpose' first."#
}, },
Example { Example {
example: r#"[1 2 3 2] | each {|e| if $e == 2 { "two" } }"#, example: r#"[1 2 3 2] | each {|e| if $e == 2 { "two" } }"#,
description: "Produce a list that has \"two\" for each 2 in the input", description: "'null' items will be dropped from the result list. It has the same effect as 'filter_map' in other languages.",
result: Some(Value::test_list(vec![ result: Some(Value::test_list(vec![
Value::test_string("two"), Value::test_string("two"),
Value::test_string("two"), Value::test_string("two"),