함수 array count value()

  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

PHP array_count_value() 문서를 참고하십시오.

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

Python count() 문서를 참고하십시오.

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

SQL COUNT() 문서를 참고하십시오.

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)

6 같이 보기

• array_count_values()
• array length