Re^2: How best to compare hash values?

by toolic (Bishop)

on May 06, 2010 at 16:44 UTC ( [id://838748]=note: print w/replies, xml )

Need Help??

my %hash1 = (); # Initialize empty hash. Perhaps unnecessary?

Yes, this is unnecessary. Either:

my %hash1;
[download]

or:

my %hash1 = (
    "1", "20",
    "2", "20",
    "4", "19",
    "5", "20",
    "10", "20",
    "6", "18");
[download]

Fat commas are nice too: 1 => 20,

I created a sub "isNull" as a homegrown replacement for "exists". The idea is to check your assumptions (and data) before you operate on that data.

Your isNull sub is not need with your data. Try:

    unless ($hash2{$thisKey}) {
[download]

instead of:

    if (isNull(\%hash2, $thisKey)) {
[download]

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Re^3: How best to compare hash values? by jimbass (Novice) on May 06, 2010 at 19:18 UTC
Thanks for the additional code and such guys. I've come to see there's quite a few different ways of accomplishing the same thing! I'm working with arrays now rather than hashes, and a mis-coding on my part showed that I may not even need arrays for some thimgs, simple variables seem to capture the data too! I'm working now on capturing output from different short scripts, and it seems that rather than call other scripts, its best to do everything possible from a single perl script. Using strict and warnings is forcing me to do a fair amount of reading, which is helpful. Thanks again to everyone!	[reply]
Re^4: How best to compare hash values? by elwarren (Priest) on May 06, 2010 at 22:08 UTC
Check out Net::SSH::Expect or Net::Telnet to poll your radios.	[reply]

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