docs: update
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README.md
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README.md
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@ -34,6 +34,7 @@ scripts and not full blown utilities.
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* [Strip characters from end of string.](#strip-characters-from-end-of-string)
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* [Arrays](#arrays)
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* [Reverse an array.](#reverse-an-array)
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* [Remove duplicate array elements.](#remove-duplicate-array-elements)
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* [Cycle through an array.](#cycle-through-an-array)
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* [Toggle between two values.](#toggle-between-two-values)
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* [File handling](#file-handling)
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@ -166,6 +167,25 @@ reverse_array() {
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}
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```
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### Remove duplicate array elements.
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Create a temporary associative array. When setting associative array
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values and a duplicate assignment occurs, bash overwrites the key. This
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allows us to effectively remove array duplicates.
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```sh
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remove_array_dups() {
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# Usage: remove_array_dups "array"
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declare -A tmp_array
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for i in "$@"; do
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[[ "$i" ]] && IFS=" " tmp_array["${i:- }"]=1
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done
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printf '%s\n' "${!tmp_array[@]}"
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}
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```
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### Cycle through an array.
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Each time the `printf` is called, the next array element is printed. When
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