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PATH=`awk -F: '{for (i=1;i<=NF;i++) { if ( !x[$i]++ ) printf("%s:",$i); }}' <<< $PATH`"$PATH"` Explanation of awk code:
In addition to being terse, this one-liner is fast: awk uses a chaining hash-table to achieve amortized O(1) performance.
based on Removing duplicate $PATH entries
PATH=`awk -F: '{for (i=1;i<=NF;i++) { if ( !x[$i]++ ) printf("%s:",$i); }}' <<< $PATH` Explanation of awk code:
In addition to being terse, this one-liner is fast: awk uses a chaining hash-table to achieve amortized O(1) performance.
based on Removing duplicate $PATH entries
PATH=`awk -F: '{for (i=1;i<=NF;i++) { if ( !x[$i]++ ) printf("%s:",$i); }}' <<< "$PATH"` Explanation of awk code:
In addition to being terse, this one-liner is fast: awk uses a chaining hash-table to achieve amortized O(1) performance.
based on Removing duplicate $PATH entries
PATH=`awk -F: '{for (i=1;i<=NF;i++) { if ( !x[$i]++ ) printf("%s:",$i); }}' <<< $PATH` Explanation of awk code:
In addition to being terse, this one-liner is fast: awk uses a chaining hash-table to achieve amortized O(1) performance.
based on Removing duplicate $PATH entries