Glasgow | 26- SDC-Mar | Taras Mykytiuk | Sprint 2 | Shell pipelines#418
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TarasMykytiuk wants to merge 3 commits into
Open
Glasgow | 26- SDC-Mar | Taras Mykytiuk | Sprint 2 | Shell pipelines#418TarasMykytiuk wants to merge 3 commits into
TarasMykytiuk wants to merge 3 commits into
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TarasMykytiuk
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📅 Sprint 2
cjyuan
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May 12, 2026
| set -euo pipefail | ||
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| # TODO: Write a command to output the names of the files in the sample-files directory whose name starts with an upper case letter. | ||
| ls sample-files | grep '\b[A-Z]' |
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\b won't work for filenames like abc.Xyz because . is considered a word boundary.
Hint: There is a regex symbol that matches "beginning of a string".
| set -euo pipefail | ||
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| # TODO: Write a command to output the names of the files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters. | ||
| ls sample-files | grep -w '[A-Z][a-z]*' |
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-
Filenames are listed one filename per line.
-woption does not help. -
Also, the regex should also work for filenames like
A123.jpg,B$$$.txt.
Note: The same also apply to script-04.sh
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| cat events.txt | grep 'Entry' | sort -u | wc -l | sed 's/$/ entries/' | ||
| cat events.txt | grep 'Exit' | sort -u | wc -l | sed 's/$/ exits/' |
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Can you use only ONE command to produce an output in the form:
5 Entry
4 Exit
?
Hint: Extract the words in the first column first.
The same applies also to script-07.sh.
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| # The input for this script is the scores-table.txt file. | ||
| # TODO: Write a command to output scores-table.txt, with lines sorted by the person's first score, descending. | ||
| sort scores-table.txt -k3 -n -r |
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Common practice is to specify options before the filename.
cjyuan
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Shell pipelines exercises are done.