updates for version 1.1

learnbyexample · Apr 13, 2020 · 229a30a · 229a30a
1 parent 0024dae
commit 229a30a
Show file tree

Hide file tree

Showing 8 changed files with 220 additions and 67 deletions.
diff --git a/code_snippets/Adding_content_from_file.sh b/code_snippets/Adding_content_from_file.sh
@@ -18,6 +18,12 @@ printf '%b' "$items" | sed -e '2 {r /dev/stdin' -e 'd}' ip.txt
 
 sed -e '/^red/r ip.txt' -e '/yellow/,//d' fav_colors.txt
 
+sed '/red/e cat ip.txt' fav_colors.txt
+
+text='good\tone\nfood\tpun'
+
+echo "$text" | sed '1e cat /dev/stdin' ip.txt
+
 sed '/red/R ip.txt' fav_colors.txt
 
 seq 4 | sed 'R /dev/stdin' fav_colors.txt

diff --git a/code_snippets/BRE_ERE_Regular_Expressions.sh b/code_snippets/BRE_ERE_Regular_Expressions.sh
@@ -118,6 +118,10 @@ echo 'foot' | sed -E 's/f.?o/X/'
 
 echo 'car bat cod map scat dot abacus' | sed 's/.*/X/'
 
+echo 'foo123312baz' | sed -E 's/o(1|2|3)+(12baz)?/X/'
+
+echo 'foo123312baz' | perl -pe 's/o(1|2|3)+(12baz)?/X/'
+
 echo 'car bat cod map scat dot abacus' | sed 's/.*m/-/'
 
 echo 'car bat cod map scat dot abacus' | sed 's/b.*t/-/'
@@ -188,6 +192,12 @@ echo "universe: '42'" | sed 's/\x27/"/g'
 
 echo 'universe: "42"' | sed 's/"/\x27/g'
 
+printf 'cute\ncot\ncat\ncoat\n' | sed -n '/\x5eco/p'
+
+echo 'hello world' | sed 's/.*/"&"/'
+
+echo 'hello world' | sed 's/.*/"\x26"/'
+
 echo 'effort flee facade oddball rat tool' | sed -E 's/\w*(\w)\1\w*/X/g'
 
 echo '\[\] and \\w and \[a-zA-Z0-9\_\]' | sed -E 's/(\\?)\\/\1/g'

diff --git a/code_snippets/Control_structures.sh b/code_snippets/Control_structures.sh
@@ -4,6 +4,10 @@ sed '/^-/{s///; b}; s/^/-/' nums.txt
 
 sed '/^-/ s///; t; s/^/-/' nums.txt
 
+printf 'good\nbad\n' | sed 's/o/-/g; T; s/d/*/g'
+
+printf 'good\nbad\nneed\n' | sed 's/o/-/g; s/a/%/g; T; a ----'
+
 echo '12345 hello42' | sed -E ':a s/^(\**)[0-9]/\1*/; ta'
 
 echo '123x45 hello42' | sed -E ':a s/^(\**)[0-9]/\1*/; ta'

diff --git a/code_snippets/Flags.sh b/code_snippets/Flags.sh
@@ -90,11 +90,7 @@ printf 'date\ndate -I\n' | sed '/date/e'
 
 printf 'date\ndate -I\n' | sed '2e'
 
-printf 'date\ndate -I\n' > dates.txt
-
-sed -i '/date/e' dates.txt
-
-cat dates.txt
+printf 'show\nexample\n' | sed '/am/e seq 2'
 
 printf 'Hi there\nHave a Nice Day\n' | sed 'N; s/H.*e/X/'
 

diff --git a/code_snippets/Shell_substitutions.sh b/code_snippets/Shell_substitutions.sh
@@ -28,6 +28,22 @@ c1=${c//&/\\&}
 
 echo 'a and b and c' | sed 's/and/'"${c1}"'/g'
 
+r='a/b&c\d'
+
+r=$(printf '%s' "$r" | sed 's#[\&/]#\\&#g')
+
+s='{[(\ta^b/d).*+?^$|]}'
+
+s=$(printf '%s' "$s" | sed 's#[{[()^$*?+.\|/]#\\&#g')
+
+echo 'f*{[(\ta^b/d).*+?^$|]} - 3' | sed -E 's/'"$s"'/'"$r"'/g'
+
+s='{[(\ta^b/d).*+?^$|]}'
+
+s=$(printf '%s' "$s" | sed 's#[[^$*.\/]#\\&#g')
+
+echo 'f*{[(\ta^b/d).*+?^$|]} - 3' | sed 's/'"$s"'/'"$r"'/g'
+
 echo 'today is date.' | sed 's/date/'"$(date -I)"'/'
 
 printf 'f1.txt\nf2.txt\n' | sed 's|^|'"$(pwd)"'/|'
@@ -36,5 +52,7 @@ p=$(pwd | sed 's|/|\\/|g')
 
 printf 'f1.txt\nf2.txt\n' | sed 's/^/'"${p}"'\//'
 
-echo '123' | sed 's/2/'"$(seq 5)"'/'
+printf 'a\n[x]\nb\n' | sed 's/x/'"$(seq 3)"'/'
+
+printf 'a\n[x]\nb\n' | sed 's/x/'"$(seq 3 | sed '$!s/$/\\/' )"'/'
 
diff --git a/exercises/Exercises.md b/exercises/Exercises.md
@@ -292,7 +292,7 @@ $ echo 'a+42//5-c pressure*3+42/5-14256' | sed ##### add your solution here
 a+8-c pressure*3+8-14256
 ```
 
-**i)** For the given greedy quantifiers, what would be the equivalent form using `{m,n}` representation?
+**i)** For the given quantifiers, what would be the equivalent form using `{m,n}` representation?
 
 * `?` is same as
 * `*` is same as

diff --git a/gnu_sed.md b/gnu_sed.md
diff --git a/sample_chapters/sed_sample_chapters.pdf b/sample_chapters/sed_sample_chapters.pdf