- reduce
1 JavaScript[ | ]

JavaScript
Copy
const numbers = [100, 20, 10];
const result = numbers.reduce(function(total, num) {
return total + num;
});
console.log( result ); // 130 = 100 + 20 + 10
▶ | 130 |
JavaScript
Copy
const numbers = [100, 20, 10];
const reducer = (accumulator, currentValue) => accumulator + currentValue;
console.log(numbers.reduce(reducer)); // 130 = 100 + 20 + 10
console.log(numbers.reduce(reducer, 5)); // 135 = 5 + 100 + 20 + 10
▶ | 130 |
▶ | 135 |
JavaScript
Copy
const numbers = [100, 20, 10];
const result = numbers.reduce(function(total, num) {
return total - num;
});
console.log( result ); // 70 = 100 - 20 - 10
▶ | 70 |
2 PHP[ | ]

PHP
Copy
$a = [2, 3, 4, 5];
$result = array_reduce($a, function($carry, $i) {
$carry += $i;
return $carry;
});
echo $result; # 14
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PHP
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$a = [2, 3, 4, 5];
$result = array_reduce($a, function($carry, $i) {
$carry *= $i;
return $carry;
}, 1);
echo $result; # 120
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3 Python[ | ]

Python
Copy
from functools import reduce
a = [2, 3, 4, 5]
print( reduce((lambda x, y: x*y), a) ) # 120
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4 같이 보기[ | ]
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