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Full Discussion: Compare bash arrays issue
Top Forums UNIX for Beginners Questions & Answers Compare bash arrays issue Post 303038704 by trexthurman on Wednesday 11th of September 2019 07:31:54 PM
Old 09-11-2019
Compare bash arrays issue

Hello everyone,
I need help comparing 2 arrays. the first array is static; the second array is not ..

Code:
array1=( "macOS Mojave" "iTunes" )
cd /Volumes
array2=( * )

# output of array2
Code:
macOS Mojave
iTunes
Mac me

The problem occurs when I compare the arrays with the following code -

Code:
 DIFF=`echo "${array1[@]}" "${array2[@]}" | tr ' ' '\n' | sort | uniq -u`

for x in "${DIFF[@]}"
        do
                echo -e "$x"
        done

# wrong result
Code:
Mac
me

# desired result
Code:
Mac me

I'm sending the output via email and it still splits up "Mac" "me" on separate lines. How could I keep the DIFF array intact? Not separating the words when I do the compare?

Last edited by Scrutinizer; 09-12-2019 at 12:16 AM.. Reason: code tags
 

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ARRAY_REPLACE(3)							 1							  ARRAY_REPLACE(3)

array_replace - Replaces elements from passed arrays into the first array

SYNOPSIS
array array_replace (array $array1, array $array2, [array $...]) DESCRIPTION
array_replace(3) replaces the values of $array1 with values having the same keys in each of the following arrays. If a key from the first array exists in the second array, its value will be replaced by the value from the second array. If the key exists in the second array, and not the first, it will be created in the first array. If a key only exists in the first array, it will be left as is. If several arrays are passed for replacement, they will be processed in order, the later arrays overwriting the previous values. array_replace(3) is not recursive : it will replace values in the first array by whatever type is in the second array. PARAMETERS
o $array1 - The array in which elements are replaced. o $array2 - The array from which elements will be extracted. o $... - More arrays from which elements will be extracted. Values from later arrays overwrite the previous values. RETURN VALUES
Returns an array, or NULL if an error occurs. EXAMPLES
Example #1 array_replace(3) example <?php $base = array("orange", "banana", "apple", "raspberry"); $replacements = array(0 => "pineapple", 4 => "cherry"); $replacements2 = array(0 => "grape"); $basket = array_replace($base, $replacements, $replacements2); print_r($basket); ?> The above example will output: Array ( [0] => grape [1] => banana [2] => apple [3] => raspberry [4] => cherry ) SEE ALSO
array_replace_recursive(3), array_merge(3). PHP Documentation Group ARRAY_REPLACE(3)
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