{"id":1446,"date":"2016-11-17T15:37:42","date_gmt":"2016-11-17T15:37:42","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/?p=1446"},"modified":"2016-11-17T15:37:42","modified_gmt":"2016-11-17T15:37:42","slug":"ah-2d-array-recap","status":"publish","type":"post","link":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/2016\/11\/17\/ah-2d-array-recap\/","title":{"rendered":"AH – 2D Array Recap"},"content":{"rendered":"

It took us a little while in class today to remember how 2D arrays work, so I thought I might go over it.<\/p>\n

A 2 dimentional (2D) array is an array of arrays. So [[1,2,3,4],[5,6,7,8],[9,10,11,12]] is a 3 item array where each item is a 4 item array. This can be written as<\/p>\n

[[1,2,3,4],<\/p>\n

[5,6,7,8],<\/p>\n

[9,10,11,12]]<\/p>\n

You might notice that it looks like a grid (or matrix), this is where the 2D comes in to\u00a0the name. In python we can create the array and assign it.<\/p>\n

\"2d\"<\/a>
2D Array in Python<\/figcaption><\/figure>\n

In the code above you can see the the individual elements of the 2D array are accessed using a pair of square brackets [][]. Using the image below we can see the [1][2] is number 7, as demonstrated in the program above.<\/p>\n

\"grid2d\"<\/a><\/p>\n

We can use a loop to\u00a0display each value in the 1st column.<\/p>\n

\"Using<\/a>
Using a for loop with a 2D array.<\/figcaption><\/figure>\n

Or a nested for to display each item in each array<\/p>\n

\"Nested<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

It took us a little while in class today to remember how 2D arrays work, so I thought I might go over it. A 2 dimentional (2D) array is an array of arrays. So [[1,2,3,4],[5,6,7,8],[9,10,11,12]] is a 3 item array where each item is a 4 item array. This can be written as [[1,2,3,4], [5,6,7,8], …<\/p>\n","protected":false},"author":32,"featured_media":1387,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320,17009],"tags":[432047,21745,432049],"class_list":["post-1446","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-advanced-higher","category-software-design-devlopment","tag-2d-array","tag-for","tag-nested-for"],"jetpack_featured_media_url":"https:\/\/blogs.glowscotland.org.uk\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/09\/Slide5.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts\/1446","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/comments?post=1446"}],"version-history":[{"count":1,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts\/1446\/revisions"}],"predecessor-version":[{"id":1451,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts\/1446\/revisions\/1451"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/media\/1387"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/media?parent=1446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/categories?post=1446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/tags?post=1446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}