Re: Re: [substr] anomaly or mine?

by dpuu (Chaplain)

on Aug 20, 2002 at 01:37 UTC ( [id://191362]=note: print w/replies, xml )

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Your first EXPECT does not fully distinguish the actual behaviour that feels anomalous:

my $s = 'ABCDE';
print substr($s,0,2)=''; # EXPECT 'CD' or 'CDE'?
[download]

The actual is 'CD'; intuition would expect 'CDE'

perhaps a better test case is

my $s = 'ABCDE';
print substr($s,0,2)='1'; # EXPECT '1C' or '1CDE'?
[download]

again, actual is "1C". --Dave

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Re: Re: Re: [substr] anomaly or mine? by Chmrr (Vicar) on Aug 20, 2002 at 01:47 UTC
My intuition would expect: `my $s = 'ABCDE'; print substr($s,0,2)='',$/; # EXPECT '', GET 'cd'? print substr($s,0,2)='foo',$/; # EXPECT 'foo', GET 'fo'?` [download] ..in parallel with all other assignments: `my $s = 'ABCDE'; print $s='',$/; # EXPECT '' print $s='foo',$/; # EXPECT 'foo'` [download] perl -pe '"I lo`+$^X$\"$]!$/"=~m%(.)%s;$_=$1;y^`+*^e v^#$&V"+@( NO CARRIER'	[reply] [d/l] [select]

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