Bash

Arraysby Pigbrain

Indexed arrays

  • 1차원 배열
  • 첫번째 요소의 인덱스는 0이다
  • 배열 요소의 개수 제한은 없다
FormMeaning
${name[i]}Use element i of array name. i can be any arithmetic expression
${name}Use element 0 of array name
${name[*]}Use all elements of array name
${name[@]}Use all elements of array name
${#name[*]} Use the number of elements in array name
${#name[@]}Use the number of elements in array name

Example

prompt> message=(hi there how are you today)
-----------------------------------------------
아래와 같은 형태로도 초기화 가능  
		message[0]=hi This is the hard way
		message[1]=there
		message[2]=how
		message[3]=are
		message[4]=you
		message[5]=today
-----------------------------------------------

prompt> echo ${message[1]}
there

prompt> echo ${message}
hi

prompt> echo ${message[*]}
hi there how are you today

prompt> echo ${message[@]}
hi there how are you today

prompt> echo ${#message[*]} 
6

prompt> echo ${#message[@]} 
6


Associative arrays

  • Bash version 4 부터 지원

Example

prompt> data=([joe]=30 [mary]=25) 

prompt> echo ${data[joe]}
30

prompt> echo ${data[mary]}
25


참고
Published 18 March 2016
Bash