How to read file into hash array ?

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open(IN, "<name_file")
  or die "Couldn't open file for processing: $!";
while (<IN>) {
  chomp;
  $hash_table{$_} = 0;
}
close IN;

print "$_ = $hash_table{$_}\n" foreach keys %hash_table;

2013-09-10, 2466👍, 0💬

How do I sort a hash by the hash value?
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What does `new $cur->{LINK}' do? (Assume the current package has no new() function of its own.)
What does `new $cur->{LINK}' do? (Assume the current package has no new() function of its own.) $cur->new()->{LI NK}The indirect object syntax only has a single token lookahead. That means if new() is a method, it only grabs the very next token, not the entire following expression. Thi... 2013-09-09, 2304👍, 0💬

How to dereference a reference?
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How do you find the length of an array?
How do you find the length of an array? $@array 2013-09-11, 2219👍, 0💬

What value is returned by a lone `return;' statement?
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What's the difference between /^Foo/s and /^Foo/?
What's the difference between /^Foo/s and /^Foo/? The second would match Foo other than at the start of the record if $* were set. The deprecated $* flag does double duty, filling the roles of both /s and /m. By using /s, you suppress any settings of that spooky variable, and force your carets and d... 2013-09-12, 2186👍, 0💬

Does Perl have reference type?
Does Perl have reference type? Yes. Perl can make a scalar or hash type reference by using backslash operator. For example $str = "here we go"; # a scalar variable $strref = \$str; # a reference to a scalar @array = (1..10); # an array $arrayref = \@array; # a reference to an array Note that the ref... 2013-09-12, 2157👍, 0💬

Why does Perl not have overloaded functions?
Why does Perl not have overloaded functions? Because you can inspect the argument count, return context, and object types all by yourself. In Perl, the number of arguments is trivially available to a function via the scalar sense of @_, the return context via wantarray(), and the types of the argume... 2013-09-06, 2113👍, 0💬

What does read() return at end of file?
What does read() return at end of file? 0 A defined (but false) 0 value is the proper indication of the end of file for read() and sysread(). 2013-09-09, 2065👍, 0💬

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