- 다른 뜻에 대해서는 array length 문서를 참조하십시오.
- 다른 뜻에 대해서는 PHP count() 문서를 참조하십시오.
- count()
- array_count_value()
1 POSIX Shell[ | ]
Bash
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FRUITS="Banana Orange Apple Orange Orange "
echo $FRUITS | tr ' ' '\n' | grep -c 'Orange' # 3
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2 PHP[ | ]
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PHP
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function array_count_value($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
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PHP
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$fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange'];
$counts = array_count_values($fruits);
echo $counts['Orange']; # 3
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3 Python[ | ]
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Python
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fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Orange']
print( fruits.count('Orange') ) # 3
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4 Perl[ | ]
Perl
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my @fruits = ('Banana', 'Orange', 'Apple', 'Orange', 'Orange');
print $k = grep { $_ eq 'Orange' } @fruits; # 3
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5 SQL[ | ]
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5.1 MySQL[ | ]
Console
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mysql> SELECT * FROM fruits;
+--------+
| value |
+--------+
| Banana |
| Orange |
| Apple |
| Orange |
| Orange |
+--------+
5 rows in set (0.00 sec)
Console
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mysql> SELECT COUNT(*) FROM fruits WHERE value='Orange';
+----------+
| COUNT(*) |
+----------+
| 3 |
+----------+
1 row in set (0.00 sec)