Here, the for loop first iterates through the keys of the my_assoc_array by for key in "${!my_assoc_array[@]}"; to store the corresponding element into a variable called value and finally prints the key-value pairs in the same line for each element using echo "Key: $key, Value:...
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If a filename contains whitespace (or any character in the current value of$IFS), it undergoesWordSplitting. Assuming we have a file named01 - Don't Eat the Yellow Snow.mp3in the current directory, theforloop will iterate over each word in the resulting file name:01,-,Don't,Eat, etc...