(→SQL) |
(→Perl) |
||
| (같은 사용자의 중간 판 4개는 보이지 않습니다) | |||
| 7번째 줄: | 7번째 줄: | ||
==POSIX Shell== | ==POSIX Shell== | ||
<syntaxhighlight lang='bash'> | <syntaxhighlight lang='bash' run> | ||
FRUITS="Banana Orange Apple Orange Orange " | FRUITS="Banana Orange Apple Orange Orange " | ||
echo $FRUITS | tr ' ' '\n' | grep -c 'Orange' | echo $FRUITS | tr ' ' '\n' | grep -c 'Orange' # 3 | ||
# 3 | |||
</syntaxhighlight> | </syntaxhighlight> | ||
| 16번째 줄: | 15번째 줄: | ||
[[category: PHP]] | [[category: PHP]] | ||
{{참고|PHP array_count_value()}} | {{참고|PHP array_count_value()}} | ||
<syntaxhighlight lang='PHP'> | <syntaxhighlight lang='PHP' run> | ||
function array_count_value($arr, $val) { | function array_count_value($arr, $val) { | ||
return count(array_filter($arr, function($v) use($val) {return $v==$val;})); | return count(array_filter($arr, function($v) use($val) {return $v==$val;})); | ||
} | } | ||
$fruits = | $fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange']; | ||
echo array_count_value($fruits, 'Orange'); | echo array_count_value($fruits, 'Orange'); # 3 | ||
# 3 | |||
</syntaxhighlight> | </syntaxhighlight> | ||
<syntaxhighlight lang='PHP'> | <syntaxhighlight lang='PHP' run> | ||
$fruits = | $fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange']; | ||
$ | $counts = array_count_values($fruits); | ||
echo $ | echo $counts['Orange']; # 3 | ||
# 3 | |||
</syntaxhighlight> | </syntaxhighlight> | ||
| 34번째 줄: | 31번째 줄: | ||
[[category: Python]] | [[category: Python]] | ||
{{참고|Python count()}} | {{참고|Python count()}} | ||
<syntaxhighlight lang='Python'> | <syntaxhighlight lang='Python' run> | ||
fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange'] | fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange'] | ||
print( fruits.count('Orange') ) | print( fruits.count('Orange') ) # 3 | ||
# 3 | |||
</syntaxhighlight> | </syntaxhighlight> | ||
==Perl== | ==Perl== | ||
[[category:Perl]] | [[category:Perl]] | ||
<syntaxhighlight lang='perl'> | <syntaxhighlight lang='perl' run> | ||
my @fruits = ('Banana', 'Orange', 'Apple', 'Orange', 'Orange'); | my @fruits = ('Banana', 'Orange', 'Apple', 'Orange', 'Orange'); | ||
print $k = grep { $_ eq 'Orange' } @fruits; | print $k = grep { $_ eq 'Orange' } @fruits; # 3 | ||
# 3 | |||
</syntaxhighlight> | </syntaxhighlight> | ||
2021년 4월 14일 (수) 19:11 기준 최신판
- 다른 뜻에 대해서는 array length 문서를 참조하십시오.
- 다른 뜻에 대해서는 PHP count() 문서를 참조하십시오.
- count()
- array_count_value()
1 POSIX Shell[ | ]
Bash
Copy
FRUITS="Banana Orange Apple Orange Orange "
echo $FRUITS | tr ' ' '\n' | grep -c 'Orange' # 3
Loading
2 PHP[ | ]
PHP array_count_value() 문서를 참고하십시오.
PHP
Copy
function array_count_value($arr, $val) {
return count(array_filter($arr, function($v) use($val) {return $v==$val;}));
}
$fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange'];
echo array_count_value($fruits, 'Orange'); # 3
Loading
PHP
Copy
$fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange'];
$counts = array_count_values($fruits);
echo $counts['Orange']; # 3
Loading
3 Python[ | ]
Python count() 문서를 참고하십시오.
Python
Copy
fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange']
print( fruits.count('Orange') ) # 3
Loading
4 Perl[ | ]
Perl
Copy
my @fruits = ('Banana', 'Orange', 'Apple', 'Orange', 'Orange');
print $k = grep { $_ eq 'Orange' } @fruits; # 3
Loading
5 SQL[ | ]
SQL COUNT() 문서를 참고하십시오.5.1 MySQL[ | ]
Console
Copy
mysql> SELECT * FROM fruits;
+--------+
| value |
+--------+
| Banana |
| Orange |
| Apple |
| Orange |
| Orange |
+--------+
5 rows in set (0.00 sec)
Console
Copy
mysql> SELECT COUNT(*) FROM fruits WHERE value='Orange';
+----------+
| COUNT(*) |
+----------+
| 3 |
+----------+
1 row in set (0.00 sec)