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how can I check the first character of each variable stored in array

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# 1  
Old 10-11-2011
how can I check the first character of each variable stored in array
variables are stored in this format

D0000, D12345, S1234, D12345 | KestrelPrdV2_0.build.177 - svn 141115 tag as V2.0.0.14


D0000, D12345, S1234, D12345

My question is how can I check the first character of each variable stored in array.It should be start with D or S.

Please help

thanks in advance
# 2  
Old 10-11-2011
Did you mean "How to check whether elements in an array starts with D or S"?
# 3  
Old 10-11-2011
expecting this ..
Code:
$ echo "S0000" | nawk '{if($0~/^D/||/^S/) {print $0} else {print "not starts"}}'
S0000
$ echo "D0000" | nawk '{if($0~/^D/||/^S/) {print $0} else {print "not starts"}}'
D0000
$ echo "X0000" | nawk '{if($0~/^D/||/^S/) {print $0} else {print "not starts with D or S"}}'
not starts with D or S

# 4  
Old 10-11-2011
How we can check number of variables in a single statement

A="D0000 D0005 D4300 D1230"
# 5  
Old 10-11-2011
Code:
$ echo $A
D0000 D0005 D4300 D1230 X0000
$ echo $A | tr ' ' '\n' | nawk '{if($0~/^D/||/^S/) {print $0" starts"} else {print $0" not starts"}}'
D0000 starts
D0005 starts
D4300 starts
D1230 starts
X0000 not starts
$

# 6  
Old 10-11-2011
Its really very helpful.Is possible that it should be terminated while the first character is not start with D or S..no need to check further,

Thanks in advance

---------- Post updated at 05:07 AM ---------- Previous update was at 04:59 AM ----------

thanks I am able to get my desired results.
# 7  
Old 10-11-2011
Code:
$ echo $A
D0000 X0000 D0005 D4300
$ echo $A | tr ' ' '\n' | nawk '{if($0!~/^D/||/^S/) {exit} else {print $0}}'
D0000
$
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