The use of hashing in Perl

A summary of the use of Kazakhstan in Perl

To assign values to a hashing value pair with a fat arrow

%some_hash = (' jim ' => ', ' Tom ' => ', ' Jerry ' => ' 21 ');

Convert Hash to List

%any_hash = (K1, ' v1 ', K2, ' v2 ', K3, ' v3 ', K4, ' V4 ');
@arr =%any_hash;

The keys function that extracts the keys from the hash, for example, into an array @k

My @k = Keys%any_hash;

Values function that extracts the value of the hash, for example, into an array @v

My @v = values%any_hash;

Each function extracts the keys and values from the hash, such as the return key-value to $k, $v

See more highlights of this column: http://www.bianceng.cnhttp://www.bianceng.cn/Programming/extra/

while ($k, $v) = each%any_hash) {

Print "$k => $v \ n";
}

exists function, check to see if a key exists in the hash, return true if there is a false

if (exists $any _hash{k1}) {

Print "This key exists.\n";
}

Delete function, deleting the keys in the hash

Delete $any _hash{k2};

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