Print file in particular order in bash

Question

I have file with content:

file.txt:

Iteration 1
RAM: +456ms
Cache: +142ms (total +417ms)

Iteration 2
Spec: +152ms
Cache: +149ms (total +413ms)

Iter         


        

Answer 1

Another Perl, using paragraph mode -00

perl -00 -lnE ' 
               while(/(^\S+):.+?(\d+)/gm ) {push(@{$kv{$1}},$2)} 
            END { foreach(keys %kv) { print "$_ @{$kv{$_}}" } }    '

with inputs

$ cat arya.txt
First launch 1
RAM: +456ms
Cache: +142ms (total +417ms)

First launch 2
Spec: +152ms
Cache: +149ms (total +413ms)

First launch 3
RAM: +184ms
Spec: +172ms
Searchms: +131ms (total +385ms)

First launch 4
RAM: +149ms
Searchms: +188ms

$ perl -00 -lnE ' while(/(^\S+):.+?(\d+)/gm ) {push(@{$kv{$1}},$2)} END { foreach(keys %kv) { print "$_ @{$kv{$_}}" } } ' arya.txt
RAM 456 184 149

Cache 142 149

Searchms 131 188

Spec 152 172


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