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How to Use the Perl Array Push() Function.
Associative Arrays. The associative arrays are very similar to numeric arrays in term of functionality but they are different in terms of their index. Associative array will have their index as string so that you can establish a strong association between key and values.The Perl push() function is used to push a value or values onto the end of an array, which increases the number of elements. The new values then become the last elements in the array.It returns the new total number of elements in the array. It's easy to confuse this function with the unshift() function, which adds elements to the beginning of an array.Array in Shell Scripting An array is a systematic arrangement of the same type of data. But in Shell script Array is a variable which contains multiple values may be of same type or different type since by default in shell script everything is treated as a string. An array is zero-based ie indexing start with 0. How to Declare Array in Shell.
Associative arrays are used to store key value pairs. For example, to store the marks of different subject of a student in an array, a numerically indexed array would not be the best choice. Instead, we could use the respective subject’s names as the keys in our associative array, and the value would be their respective marks gained.Associative Arrays (Hashes) This chapter will introduce the third major Perl abstract data type, associative arrays. Also known as hashes, associative arrays provide native language support for one of the most useful data structures that programmers implement--the hash table.
