How to pass an array as an argument to a function?

How to pass an array as an argument to a function?

Here is one example: As described, function f receives two arguments: the first is assigned to x which is an array, the second to y. f can be called in two ways. The first way use the “$ {a [@]}” as the first argument, and the result is: The second way use the “$ {a [*]}” as the first argument, and the result is: Neither result is as I wished.

Why is my array not found in Bash?

I always got the same message : “my_array [1]: command not found”. Then I saw Chris AtLee’s comment about bash not liking the space after the equal sign. I removed the spaces before and after the equal signs. Then, I simply tried the following in the terminal and didn’t have the error message anymore.

Do you return an array from a function?

We don’t return an array from functions, rather we return a pointer holding the base address of the array to be returned. But we must, make sure that the array exists after the function ends i.e. the array is not local to the function.

Can you pass an array to a function in Bash?

You cannot pass an array, you can only pass its elements (i.e. the expanded array). You can pass an array by name reference to a function in bash (since version 4.3+), by setting the -n attribute: See also nameref or declare -n in the man page. You could pass the “scalar” value first.

If you want to pass a single-dimension array as an argument in a function, you would have to declare function formal parameter in one of following three ways and all three declaration methods produce similar results because each tells the compiler that an integer pointer is going to be received.

Can you pass arrays around in bash script?

Bash arrays are not “first class values” — you can’t pass them around like one “thing”. Note: It might appear weird that I am executing script using . ./script syntax. Note that this is for executing commands of the script in the current shell environment.

Can you pass an array to a function in C + +?

Previous Page. Next Page. C++ does not allow to pass an entire array as an argument to a function. However, You can pass a pointer to an array by specifying the array’s name without an index.

Can you write an array to a file?

You can write your array to a file, then source the file in your script. e.g.: source $2 It will complain at you (“bad substitution”), but will work. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid …