Tool Command Language- Lecture 8 ( search list)

Use of lsearch , lindex and lsort 
a)- lsearch

syntax.
set list {{item1} [item2}...}
set variable [lsearch  $list  item]
it will return index of item. Remember it starts from 0.
Example:

set p {{java 1991} {c 1987} {python 2000} {tcl 2005}} 
set x [lsearch $p "python 2000"]

puts $x 

out put : 2
Note: if output is -1 then the searched value is not present in list.

b) - lindex

syntax.
set list {{item1} [item2}...}
puts [lindex  $list  index(number)]
it will return value at index in list .

Example:

set p {{java 1991} {c 1987} {python 2000} {tcl 2005}} 
puts  [lindex $p 3]
out put : tcl 2005

c)-lsort
syntax.
set list {{item1} [item2}...}
lsort $list
Example:

set p {{java 1991} {c 1987} {python 2000} {tcl 2005}} 
lsort  $p
out put : {c 1987} {java 1991} {python 2000} {tcl 2005}