readarray

readarray

Sure. The readarray command in Linux is used to read the contents of an array into the shell. It is a built-in command that is supported by all Linux distributions.

The readarray command is used in the following syntax:

readarray [options] [array]

The array is the name of the array to read the contents of.

The options can be used to specify the following:

• -t : Treat the input as a text file.

• -s : Separate the elements of the array with the specified delimiter.

• -n : Read a specific number of elements from the input.

For example, to read the contents of the file myarray into the array myarray, you would run the following command:

readarray -t myarray myarray.txt

This command will read the contents of the file myarray.txt into the array myarray. The elements of the array will be separated by spaces.

To read the contents of the file myarray into the array myarray, with each element separated by a comma, you would run the following command:

readarray -t -s, myarray myarray.txt

This command will read the contents of the file myarray.txt into the array myarray. The elements of the array will be separated by commas.

To read the first five elements of the file myarray into the array myarray, you would run the following command:

readarray -t -n 5 myarray myarray.txt

This command will read the first five elements of the file myarray.txt into the array myarray.

The readarray command is a versatile tool that can be used to read the contents of an array into the shell. It is a built-in command that is supported by all Linux distributions.

Here are some additional things to note about the readarray command:

• The readarray command can be used to read the contents of any file into an array.

• The readarray command can be used to read the contents of a pipe into an array.

• The readarray command can be used to read the contents of standard input into an array.

• The readarray command is a powerful tool that can be used to process data in arrays.

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