London | 26-SDC-July | AYK | Sprint1 | Module-Tool

individual-shell-tools/awk/script-01.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output just the names of each player in `scores-table.txt`.
 # Your output should contain 6 lines, each with just one word on it.
+
+cd individual-shell-tools/awk
+awk '{print $1}' scores-table.txt

individual-shell-tools/awk/script-02.sh

@@ -4,3 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of each player, as well as their city.
 # Your output should contain 6 lines, each with two words on it, separated by a space.
+cd individual-shell-tools/awk
+awk '{print $1, $2}' scores-table.txt

individual-shell-tools/awk/script-03.sh

@@ -5,3 +5,6 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the score from their first attempt.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 1".
+
+cd individual-shell-tools/awk
+awk '{print $1, $3}' scores-table.txt

individual-shell-tools/awk/script-04.sh

@@ -2,6 +2,9 @@
 
 set -euo pipefail
 
-# TODO: Write a command to output just the names of each player in London along with the score from their last attempt.
+# TODO: Write a command to output just the names of each player in $2London along with the score from their last attempt.
 # Your output should contain 3 lines, each with one word and one number on it.
 # The first line should be "Ahmed 4".
+
+cd individual-shell-tools/awk
+awk '/London/ {print $1, $NF}' scores-table.txt

individual-shell-tools/awk/script-05.sh

@@ -5,3 +5,6 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the number of times they've played the game.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 3".
+
+cd individual-shell-tools/awk
+awk '{count = $3+$4+$5+$6+$7}  {print $1, count}' scores-table.txt 

individual-shell-tools/awk/script-06-stretch.sh

@@ -6,3 +6,6 @@ set -euo pipefail
 
 # TODO: Write a command to output the total of adding together all players' first scores.
 # Your output should be exactly the number 54.
+
+cd individual-shell-tools/awk
+awk '{count += $3} END {print count}' scores-table.txt 

individual-shell-tools/awk/script-07-stretch.sh

@@ -7,3 +7,6 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the total of adding all of that player's scores.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 15". The second line should be "Basia 37"
+
+cd individual-shell-tools/awk
+awk '{count = $3+$4+$5+$6+$7}  {print $1, count}' scores-table.txt 

individual-shell-tools/cat/script-01.sh

@@ -3,4 +3,6 @@
 set -euo pipefail
 
 # TODO: Write a command to output the contents of the helper-1.txt file inside the helper-files directory to the terminal.
+cd individual-shell-tools/helper-files
+cat helper-1.txt
 # The output of this command should be "Once upon a time...".

individual-shell-tools/cat/script-02.sh

@@ -11,3 +11,6 @@ set -euo pipefail
 # It looked delicious.
 # I was tempted to take a bite of it.
 # But this seemed like a bad idea...
+
+cd individual-shell-tools/helper-files
+cat helper-1.txt helper-2.txt helper-3.txt 

individual-shell-tools/cat/script-03.sh

@@ -9,3 +9,6 @@ set -euo pipefail
 # 1 It looked delicious.
 # 2 I was tempted to take a bite of it.
 # 3 But this seemed like a bad idea...
+
+cd individual-shell-tools/helper-files
+cat -n helper-3.txt

individual-shell-tools/cat/script-04-stretch.sh

@@ -13,3 +13,7 @@ set -euo pipefail
 # 3 It looked delicious.
 # 4 I was tempted to take a bite of it.
 # 5 But this seemed like a bad idea...
+
+cd individual-shell-tools/helper-files
+cat helper-1.txt helper-2.txt helper-3.txt | nl
+

individual-shell-tools/grep/script-01.sh

@@ -4,3 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
 # The output should contain 6 lines.
+cd individual-shell-tools/grep
+grep "^Doctor" dialogue.txt

individual-shell-tools/grep/script-02.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the word Doctor (regardless of case).
 # The output should contain 9 lines.
+
+cd individual-shell-tools/grep
+grep -i "Doctor" dialogue.txt

individual-shell-tools/grep/script-03.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in dialogue.txt that contain the word Doctor (regardless of case).
 # The output should be exactly the number 9.
+
+cd individual-shell-tools/grep
+grep -ic "Doctor" dialogue.txt

individual-shell-tools/grep/script-04.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
 # The output should contain 10 lines.
+
+cd individual-shell-tools/grep
+grep -iv "Hello" dialogue.txt

individual-shell-tools/grep/script-05.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the string "cure", as well as the line before that line.
 # The output should contain two pairs of two lines of text (with a separator between them).
+
+cd individual-shell-tools/grep
+grep -B 1 "cure" dialogue.txt

individual-shell-tools/grep/script-06.sh

@@ -4,3 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command to output the name of every `.txt` file in this directory which contains a line of dialogue said by the Doctor.
 # The output should contain two filenames.
+cd individual-shell-tools/grep
+grep -rl "Doctor" *.txt

individual-shell-tools/grep/script-07.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output, for each `.txt` file in this directory, how many lines of dialogue the Doctor has.
 # The output should show that dialogue.txt contains 6 lines, dialogue-2.txt contains 2, and dialogue-3.txt contains 0.
+
+cd individual-shell-tools/grep
+grep -rc "^Doctor" *.txt

individual-shell-tools/ls/script-01.sh

@@ -12,4 +12,6 @@ if [[ "${script_dir}" != "$(pwd)" ]]; then
 fi
 
 # TODO: Write a command to list the files and folders in this directory.
+ cd individual-shell-tools/ls 
+ ls
 # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more.

individual-shell-tools/ls/script-02.sh

@@ -3,4 +3,7 @@
 set -euo pipefail
 
 # TODO: Write a command which lists all of the files in the directory named child-directory.
+cd individual-shell-tools/ls/child-directory
+ls
+
 # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.

individual-shell-tools/ls/script-03.sh

@@ -3,5 +3,9 @@
 set -euo pipefail
 
 # TODO: Write a command which _recursively_ lists all of the files and folders in this directory _and_ all of the files inside those folders.
+cd individual-shell-tools/ 
+cd ls
+ls -R
+
 # The output should be a list of names including: child-directory, script-01.sh, helper-1.txt (and more).
 # The formatting of the output doesn't matter.

individual-shell-tools/ls/script-04.sh

@@ -15,9 +15,12 @@ echo "First exercise (sorted newest to oldest):"
 
 # TODO: Write a command which lists the files in the child-directory directory, one per line, sorted so that the most recently modified file is first.
 # The output should be a list of names in this order, one per line: helper-3.txt, helper-1.txt, helper-2.txt.
-
+cd individual-shell-tools/ls/child-directory
+ls -lt
 
 echo "Second exercise (sorted oldest to newest):"
 
 # TODO: Write a command which does the same as above, but sorted in the opposite order (oldest first).
 # The output should be a list of names in this order, one per line: helper-2.txt, helper-1.txt, helper-3.txt.
+cd individual-shell-tools/ls/child-directory
+ls -ltr

individual-shell-tools/sed/script-01.sh

@@ -4,4 +4,7 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt with all occurrences of the letter `i` replaced with `I`.
 # The output should contain 11 lines.
-# The first line of the output should be: "ThIs Is a sample fIle for experImentIng wIth sed.".
+# The first line of the output should be: "ThIs Is a sample fIle for experImentIng with sed.".
+
+cd individual-shell-tools/sed
+sed 's/i/I/g' input.txt

individual-shell-tools/sed/script-02.sh

@@ -2,6 +2,11 @@
 
 set -euo pipefail
 
-# TODO: Write a command to output input.txt with numbers removed.
+# TODO: Write a command to output input.txt with /
 # The output should contain 11 lines.
 # Line 6 of the output should be " Alisha".
+
+cd individual-shell-tools/sed
+sed 's/[0-9]/ /g' input.txt
+
+

individual-shell-tools/sed/script-03.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt removing any line which contains a number.
 # The output should contain 6 lines.
+
+cd individual-shell-tools/sed
+sed '/[0-9]/d' input.txt

individual-shell-tools/sed/script-04.sh

@@ -4,3 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt replacing every occurrence of the string "We'll" with "We will".
 # The output should contain 11 lines.
+cd individual-shell-tools/sed
+sed "s/We'll/We Will/g" input.txt

individual-shell-tools/sed/script-05.sh

@@ -6,3 +6,5 @@ set -euo pipefail
 # If a line starts with a number and a space, make the line instead end with a space and the number.
 # So line 6 which currently reads "37 Alisha" should instead read "Alisha 37".
 # The output should contain 11 lines.
+cd individual-shell-tools/sed
+sed -E 's/^([0-9]+) (.*)$/ \2 \1/' input.txt

individual-shell-tools/sed/script-06.sh

@@ -8,3 +8,6 @@ set -euo pipefail
 # The output should contain 11 lines.
 # Line 3 should be "It contains many lines, and there are some things you may want to do with each of them.".
 # Line 11 should be "We also should remember, when we go shopping, to get 4 items: oranges, cheese, bread, olives.".
+
+cd individual-shell-tools/sed
+sed -E 's/,([^ ])/, / \1/g'

individual-shell-tools/wc/script-01.sh

@@ -4,3 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of words in the file helper-files/helper-3.txt.
 # The output should include the number 19. The output should not include the number 92.
+
+cd individual-shell-tools/helper-files
+wc -w helper-3.txt

individual-shell-tools/wc/script-02.sh

@@ -4,3 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in the file helper-files/helper-3.txt.
 # The output should include the number 3. The output should not include the number 19.
+cd individual-shell-tools/helper-files
+wc -l helper-3.txt

individual-shell-tools/wc/script-03.sh

@@ -8,3 +8,6 @@ set -euo pipefail
 #        1       7      39 ../helper-files/helper-2.txt
 #        3      19      92 ../helper-files/helper-3.txt
 #        5      30     151 total
+
+cd individual-shell-tools/helper-files
+wc helper-1.txt helper-2.txt helper-3.txt 

number-systems/Part-1.md

@@ -7,48 +7,48 @@ The goal of these exercises is for you to gain an intuition for binary numbers.
 The answers to these questions should be a number, either in binary, hex, or decimal.
 
 Q1: Convert the decimal number 14 to binary.
-Answer:
+Answer: 1110
 
 Q2: Convert the binary number 101101 to decimal:
-Answer:
+Answer:45
 
 Q3: Which is larger: 1000 or 0111?
-Answer:
+Answer:1000
 
 Q4: Which is larger: 00100 or 01011?
-Answer:
+Answer:01011
 
 Q5: What is 10101 + 01010?
-Answer:
+Answer:11111
 
 Q6: What is 10001 + 10001?
-Answer:
+Answer:100010
 
 Q7: What's the largest number you can store with 4 bits, if you want to be able to represent the number 0?
-Answer:
+Answer:15
 
 Q8: How many bits would you need in order to store the numbers between 0 and 255 inclusive?
-Answer:
+Answer: 8 bits
 
 Q9: How many bits would you need in order to store the numbers between 0 and 3 inclusive?
-Answer:
+Answer:2 bits
 
 Q10: How many bits would you need in order to store the numbers between 0 and 1000 inclusive?
-Answer:
+Answer:32 bits
 
 Q11: Convert the decimal number 14 to hex.
-Answer:
+Answer: E
 
 Q12: Convert the decimal number 386 to hex.
-Answer:
+Answer:182
 
 Q13: Convert the hex number 386 to decimal.
-Answer:
+Answer:902
 
 Q14: Convert the hex number B to decimal.
-Answer:
+Answer:11
 
 Q15: If reading the byte 0x21 as a number, what decimal number would it mean?
-Answer:
+Answer:33
 
 Q16: Continues in Part-2

number-systems/Part-2.md

@@ -7,16 +7,16 @@ The goal of these exercises is for you to gain an intuition for binary numbers.
 The answers to these questions will require a bit of explanation, not just a simple answer.
 
 Q16: How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)?
-Answer:
+Answer:if there is only single 1 in the binary number then it is power of 2.
 
 Q17: If reading the byte 0x21 as an ASCII character, what character would it mean?
-Answer:
+Answer:! (Looking at the ASCII text encoding Table)
 
 Q18: If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean?
-Answer:
+Answer: I need explanation for this and guid me how to calculate to guess the color.
 
 Q19: If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be?
-Answer:
+Answer:170,0,255
 
 Q20: If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean?
-Answer:
+Answer:I need explanation for this and guid me how to calculate to guess the color.