Difference between revisions of "Array Manipulation"
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b=a.chunks(10) | b=a.chunks(10) | ||
| − | b.$$(SUM) | + | </br>b.$$(SUM) |
{| class="wikitable"|- | {| class="wikitable"|- | ||
Revision as of 20:42, 14 May 2020
Introduction to Array Manipulation
Arrays/Sets/Matrices are fundamental data structures in z^3. Manipulation of such data structures are often done using custom code in most languages. However, z^3 offers a ton of Array member functions that make it a breeze to handle and manipulate such data structures.
For example, take .chunks().
a=1..100;
This creates a list of 100 numbers. Now, let us make them into chunks of 10 each.
a.chunks(10)
gives
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
| 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |
| 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 |
| 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 |
| 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 |
| 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 |
Simple, isn't it?
The result gives a 10x10 matrix filled with the sequence of numbers from 1 to 100.
Let us say we want to calculate the sum of each row in this 10x10 matrix. The $$ row wise mapping function comes to the rescue.
b=a.chunks(10)
b.$$(SUM)
| 55 |
| 155 |
| 255 |
| 355 |
| 455 |
| 555 |
| 655 |
| 755 |
| 855 |
| 955 |