Array length

1 개요

len
length
count

배열의 길이

2 Bash

systems=("Solar System" "Alpha Centauri" "Barnard's Star")
echo ${#systems[@]}
# 3
echo ${#systems[*]}
# 3

3 C#

string[] weekDays2 = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
MessageBox.Show(weekDays2.Length);
// shows 7

4 Java

String[] weekDays2 = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
System.out.println(weekDays2.length);
// shows 7

5 JavaScript

var weekDays2 = [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ];
document.write(weekDays2.length);
// shows 7

6 Objective-C

NSArray *weekDays2 = [NSArray arrayWithObjects:@"Sun", @"Mon", @"Tue", @"Wed", @"Thu", @"Fri", @"Sat", nil];
NSLog(@"%lu", [weekDays2 count]);
// shows 7

7 Perl

@nums = (1,2,3,4);
print scalar(@nums);
# shows 4

8 PHP

PHP count() 문서를 참고하십시오.

$nums = array(1,2,3,4);
echo count($nums);
// shows 4

9 POSIX Shell

WEEKDAYS2="Sun Mon Tue Wed Thu Fri Sat"
echo $WEEKDAYS2 | tr ' ' '\n' | grep -cP '\S+'
# 7

10 Python

Python len() 문서를 참고하십시오.

nums = [1,2,3,4]
print len(nums)
# shows 4

11 R

R언어 length() 문서를 참고하십시오.

x <- c("apple","banana","orange")
length(x)
#[1] 3

12 Ruby

nums = [1,2,3,4]
puts nums.size
# shows 4

13 같이 보기