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Updated SC2237 (markdown)

Eisuke Kawashima
2025-07-31 17:22:49 +09:00
parent da327e28af
commit a0e9f59070
1 changed files with 8 additions and 6 deletions
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SC2237.md

@@ -20,6 +20,7 @@ if [ -n "$STY" ]; then echo "You are already running screen"; fi
You have negated `test -z` or `test -n`, resulting in a needless double-negative. You can just use the other operator instead: You have negated `test -z` or `test -n`, resulting in a needless double-negative. You can just use the other operator instead:
```sh
# Identical tests to verify that a value is assigned # Identical tests to verify that a value is assigned
! [ -z foo ] # Not has no value ! [ -z foo ] # Not has no value
[ -n foo ] # Has value [ -n foo ] # Has value
@@ -27,6 +28,7 @@ You have negated `test -z` or `test -n`, resulting in a needless double-negative
# Identical tests to verify that a value is empty # Identical tests to verify that a value is empty
! [ -n foo ] # Not is non-empty ! [ -n foo ] # Not is non-empty
[ -z foo ] # Is empty [ -z foo ] # Is empty
```
### Exceptions: ### Exceptions: