Glasgow | 26- SDC-Mar | Taras Mykytiuk | Sprint 2 | Shell pipelines

shell-pipelines/ls-grep/script-01.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output the names of the files in the sample-files directory whose name contains at least one upper case letter.
+ls sample-files | grep '[A-Z]'
 # Your output should contain 11 files.

shell-pipelines/ls-grep/script-02.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # 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]'
 # Your output should contain 10 files.

shell-pipelines/ls-grep/script-03.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # 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]*'
 # Your output should contain 7 files.

shell-pipelines/ls-grep/script-04.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to count the number of 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]*' | wc -l
 # Your output should be the number 7.

shell-pipelines/sort-uniq-head-tail/script-01.sh

@@ -4,4 +4,5 @@ set -euo pipefail
 
 # 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 name.
+sort scores-table.txt -k1
 # The first line of your output should be "Ahmed London 1 10 4" (with no quotes). And the third line should be "Chandra Birmingham 12 6".

shell-pipelines/sort-uniq-head-tail/script-02.sh

@@ -4,4 +4,5 @@ set -euo pipefail
 
 # 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
 # The first line of your output should be "Basia London 22 9 6" (with no quotes).

shell-pipelines/sort-uniq-head-tail/script-03.sh

@@ -4,6 +4,7 @@ set -euo pipefail
 
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with shows the lines for the three players with the highest first score, in descending order.
+sort scores-table.txt -k3 -n -r | head -3
 # Your output should be:
 # Basia London 22 9 6
 # Piotr Glasgow 15 2 25 11 8

shell-pipelines/sort-uniq-head-tail/script-04.sh

@@ -4,4 +4,5 @@ set -euo pipefail
 
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with shows the line for the player whose first score was the second highest.
+sort scores-table.txt -k3 -n -r | sed -n '2p'
 # Your output should be: "Piotr Glasgow 15 2 25 11 8" (without quotes).

shell-pipelines/sort-uniq-head-tail/script-05.sh

@@ -4,5 +4,6 @@ set -euo pipefail
 
 # The input for this script is the events.txt file.
 # TODO: Write a command to show a list of all events that have happened, without duplication.
+cat events.txt | sort -u
 # The order they're displayed doesn't matter, but we never want to see the same event listed twice.
 # Your output should contain 6 lines.

shell-pipelines/sort-uniq-head-tail/script-06.sh

@@ -4,4 +4,6 @@ set -euo pipefail
 
 # The input for this script is the events.txt file.
 # TODO: Write a command to show how many times anyone has entered and exited.
+cat events.txt | grep 'Entry' | sort -u | wc -l | sed 's/$/ entries/'
+cat events.txt | grep 'Exit' | sort -u | wc -l | sed 's/$/ exits/'
 # It should be clear from your script's output that there have been 5 Entry events and 4 Exit events.

shell-pipelines/sort-uniq-head-tail/script-07.sh

@@ -4,5 +4,7 @@ set -euo pipefail
 
 # The input for this script is the events-with-timestamps.txt file.
 # TODO: Write a command to show how many times anyone has entered and exited.
+cat events-with-timestamps.txt | grep 'Entry' | sort -u | wc -l | sed 's/$/ entries/'
+cat events-with-timestamps.txt | grep 'Exit' | sort -u | wc -l | sed 's/$/ exits/'
 # It should be clear from your script's output that there have been 5 Entry events and 4 Exit events.
 # The word "Event" should not appear in your script's output.

shell-pipelines/tr/script-01.sh

@@ -6,3 +6,4 @@ set -euo pipefail
 # The author got feedback that they're using too many exclamation marks (!).
 #
 # TODO: Write a command to output the contents of text.txt with every exclamation mark (!) replaced with a full-stop (.).
+cat text.txt | tr '!' '.'

shell-pipelines/tr/script-02.sh

@@ -7,3 +7,4 @@ set -euo pipefail
 # so every Y should be a Z, and every Z should be a Y!
 #
 # TODO: Write a command to output the contents of text.txt with every Y and Z swapped (both upper and lower case).
+cat text.txt | tr 'YyZz' 'ZzYy'