Add a new element to an array without specifying the index in Bash

by

Yes there is:

ARRAY=()
ARRAY+=('foo')
ARRAY+=('bar')

Bash Reference Manual:

In the context where an assignment statement is assigning a value to a shell variable or array index (see Arrays), the ‘+=’ operator can be used to append to or add to the variable’s previous value.

Also:

When += is applied to an array variable using compound assignment (see Arrays below), the variable’s value is not unset (as it is when using =), and new values are appended to the array beginning at one greater than the array’s maximum index (for indexed arrays)

More Related Contents:

  1. Multi-dimensional arrays in Bash
  2. Input data to a shell script [closed]
  3. How to escape single quotes within single quoted strings
  4. When do we need curly braces around shell variables?
  5. Why does my Bash code fail when I run it with ‘sh’?
  6. Accessing bash command line args $@ vs $*
  7. Replace one substring for another string in shell script
  8. How can I escape a double quote inside double quotes?
  9. How can I add numbers in a Bash script?
  10. Tilde in path doesn’t expand to home directory
  11. Reliable way for a Bash script to get the full path to itself [duplicate]
  12. Parallelize Bash script with maximum number of processes
  13. Checking from shell script if a directory contains files
  14. Escape dollar sign in string by shell script
  15. How to return an array in bash without using globals?
  16. Is there a better way to run a command N times in bash?
  17. Bash script error [: !=: unary operator expected
  18. Reading a space-delimited string into an array in Bash
  19. Piping tail output though grep twice
  20. How to check if element exists in array with jq
  21. Assign string containing null-character (\0) to a variable in Bash
  22. How to merge two arrays in a zipper like fashion in Bash?
  23. How do I limit the running time of a BASH script
  24. Why equal to operator does not work if it is not surrounded by space?
  25. In bash, is there an equivalent of die “error msg”
  26. How do I integrate MSYS2 shell into Visual studio code on Window?
  27. reverse the order of characters in a string
  28. What’s the cmd/PowerShell equivalent of back tick on Bash?
  29. Why doesn’t my terminal output unicode characters properly?
  30. In Bash test if associative array is declared

Leave a Comment