tests/new-exp8.sub

   1 pat1='str'
   2 pat2='[^;]'
   3 pat3='[[:alnum:]_]'
   4 pat4='[[:alnum:]][[fu]b'
   5 pat5='?tr'
   6 pat6='?tr\'
   7 pat7='[[:alnum:]]_'
   8 pat8='*tr'
   9
  10 declare z="start"
  11 declare NUM=1000
  12
  13 #----------------------------------
  14 # create a long string with ';'
  15 #----------------------------------
  16 for ((i=0; i<$NUM; i++)); do
  17     z="$z;string$i"
  18 done
  19
  20 #z="$z;string;foo"
  21
  22 #------------------------------
  23 # delete everything except ';'
  24 #------------------------------
  25
  26 # try different patterns here
  27 x="${z//$pat1}"
  28 echo $x
  29 x="${z//$pat2}"
  30 echo $x
  31 x="${z//$pat3}"
  32 echo $x
  33 x="${z//$pat4}"
  34 echo $x
  35 x="${z//$pat5}"
  36 echo $x
  37 x="${z//$pat6}"
  38 echo $x
  39 x="${z//$pat7}"
  40 echo $x
  41 x="${z//$pat8}"
  42 echo $x
  43
  44
  45 declare z="start"
  46 declare NUM=1000
  47
  48 #----------------------------------
  49 # create a long string with ';'
  50 #----------------------------------
  51 for ((i=0; i<$NUM; i++)); do
  52     z="$z;string$i"
  53 done
  54
  55 #z="$z;string;foo"
  56
  57 #------------------------------
  58 # delete everything except ';'
  59 #------------------------------
  60
  61 # try different patterns here
  62 x="${z//[^;]}"
  63 echo $x
  64 x="${z/#[^;][^;]}"
  65 echo $x
  66 x="${z/%[^;][^;]}"
  67 echo $x
  68
  69 export LANG=C LC_ALL=C LC_CTYPE=C
  70
  71 # try different patterns here
  72 x="${z//$pat1}"
  73 echo $x
  74 x="${z//$pat2}"
  75 echo $x
  76 x="${z//$pat3}"
  77 echo $x
  78 x="${z//$pat4}"
  79 echo $x
  80 x="${z//$pat5}"
  81 echo $x
  82 x="${z//$pat6}"
  83 echo $x
  84 x="${z//$pat7}"
  85 echo $x
  86 x="${z//$pat8}"
  87 echo $x
  88
  89 # try different patterns here
  90 x="${z//[^;]}"
  91 echo $x
  92 x="${z/#[^;][^;]}"
  93 echo $x
  94 x="${z/%[^;][^;]}"
  95 echo $x
  96
  97 # post-bash-4.3 changes to make pattern replacement honor nocasematch variable
  98 unset string
  99 string=abcd
 100
 101 shopt -s nocasematch
 102
 103 echo ${string//A/z}
 104 echo ${string//BC/x}
 105 echo ${string//[BC]/x}
 106 echo ${string//[bC]/x}
 107 echo ${string//?/z}
 108
 109 LC_ALL=C
 110 echo ${string//A/z}
 111 echo ${string//BC/x}
 112 echo ${string//[BC]/x}
 113 echo ${string//[bC]/x}
 114 echo ${string//?/z}
 115
 116