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Why do we need Jagged Arrays? Can't we do the same thing with Multidimensional arrays? It is so confusing to guess when to use w

30th May 2017, 8:52 AM
Kasturi Kulal
2 ответов
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Each row of any multidimensional array will have fixed length. In case of Jagged arrays, each row can have different number of elements. Example: User enters an array { 3,4,5,6,8,9,10,12,15,18} and we want to store them in different arrays as (n%3) Then its better to use jagged array as this will save memory. Jagged array will look like { { 3,6,9,12,15,18}, {4,10}, {5,8} } Jagged arrays can also be used for hashing.
2nd Jun 2017, 4:53 PM
Ashish Kulkarni
Ashish Kulkarni - avatar
0
the most common use of jagged arrays is for efficiency - if many of your "rows" (in a 2 column array) will be empty, you can save a great deal of memory by not initialising them. for "jagged" think "sparse". the ones you use may well all be the same size, but you don't use all of them.
17th Jun 2017, 6:29 PM
jonjump