Shell Programming and Scripting

<empty>
<empty>
<empty>
NAME :ABC        AGE :15
GENDER :MALE
<other strings> 
<other strings>   
NAME :DEF       AGE :18
GENDER :FEMALE
<other strings> 
<other strings>   
NAME :GHI       AGE :5
GENDER :FEMALE 
<other strings> 
<other strings>

ABC|15|MALE
DEF|18|FEMALE
GHI|5|FEMALE

{
	if (substr($1,1,4) == "NAME")
         {  
 	   name = substr($2,2) ; age = substr($4,2)
	   }
	if (substr($1,1,6) == "GENDER")
         {  
 	   gender = substr($2,2)
	   }
print name"|"age"|"gender
}

||
||
ABC|15|MALE
ABC|15|MALE
ABC|15|MALE
ABC|15|MALE
DEF|18|FEMALE
DEF|18|FEMALE
DEF|18|FEMALE
DEF|18|FEMALE
GHI|5|FEMALE
GHI|5|FEMALE
GHI|5|FEMALE
GHI|5|FEMALE
||
||

BEGIN {
  FS="[ :]"
  OFS="|"
}
$1 == "NAME" { name =$3; age=$NF}
$1 == "GENDER" { print name, age, $NF}

awk '
/NAME/{
 for(i=2;i<=NF;i+=2){
   gsub(":","",$i)
   printf "%s|",$i
 }
}
/GENDER/{gsub(/GENDER.*:/,"");print}
' file

nawk 'BEGIN{
FS="[ :]"
}
/NAME/{
tmp=sprintf("%s|%s",$3,$NF)
getline
tmp=sprintf("%s|%s",tmp,$3)
print tmp
}' yourfile

$/="NAME";
while(<DATA>){
	print "$1|$2|$3\n" if /:([^ ]+)\s+AGE\s*:([^ \n]+).*GENDER\s*:([^ \n]+)/s;
}
__DATA__
<empty>
<empty>
<empty>
NAME :ABC        AGE :15
GENDER :MALE
<other strings>
<other strings>
NAME :DEF       AGE :18
GENDER :FEMALE
<other strings>
<other strings>
NAME :GHI       AGE :5
GENDER :FEMALE
<other strings>
<other strings>