perl - array and hash common differences

S.No	ARRAYS	HASHES
1.          2.          3.                      4.                            5.                     6.            7.                      8.                    9.       10.       11.      12.       13.        14.        15.	It is ordered data collection Data Can be accessed based on index value Stack operations performed using push,pop,shift,unshift Duplicate Elements will be exist in Array For Large data, Arrays will not be in speed as getting values from hash keys. Arrays can be created using () brackets @array=(1,3,5,6,2); For More methods refer this link. https://kaavannan-perl.blogspot.com/2019/11/perl-array-what-is.html for accessing array index $array[1]; Array can be accessed in loops as below 1.For(@array) { } 2.foreach(@array1,@array2)    {        Print $_;    } 3.print grep{},@array; 4. print map{},@array; Array slices can be used as below @array[2]; To find length of an array  $#array+1;        or scalar(@array);       or $a=@array; For Emptying Array $#array = -1;      or @array = ( ); To reverse an array print reverse @array; To sort array Elements ascending order @a=sort{$a <=> $b }@array; desending order @a=sort{$b <=> $a }@array; To add array elements $array[0]='55'; To Delete array elements delete $array[1];	It is unordered Data Collection Data Can be accessed based on Key value Stack operations cannot be performed Keys will not have Duplicate elements but Values would have Duplicate elements. Based on hash Keys Data retrival would be fast Hash is also possible to create using () bracket %hash=(1,3,5,6,2); For More methods refer this link. https://kaavannan-perl.blogspot.com/2019/10/perl-hashes-what-is.html For accessing hash index use the key name $hash{1}; Hash can be accessed based on keys and values While(($k,$vals) = each %h) {     Print “$k,$vals\n”; } Foreach $k (keys %h) { Print “$k => $hash{$k}\n”; } Foreach $values (values %hash) { Print “$values\n”; } Hash slices can be used as below, $hash{'1'} To find length of hash @array=keys %hash; scalar(@array);      or $#array+1;      or $a=@array; For Emptying hash %hash=( ); To reverse a hash print reverse %hash; To sort hash elements  foreach $k (sort keys %hash) {    print "$k => $hash{$k}\n"; } To add hash Elements $hash{1}='one'; To Delete hash elements delete($hash{'1'});