{"id":3712,"date":"2020-09-03T00:49:52","date_gmt":"2020-09-02T15:49:52","guid":{"rendered":"https:\/\/katblog.manadream.net\/?p=3712"},"modified":"2020-10-11T22:07:51","modified_gmt":"2020-10-11T13:07:51","slug":"associative-arrays","status":"publish","type":"post","link":"https:\/\/katblog.manadream.net\/index.php\/2020\/09\/03\/associative-arrays\/","title":{"rendered":"[PHP]Let’s Try Using Associative Arrays![Programming for Kids and Above #5]"},"content":{"rendered":"

Hello!<\/p>\n

I’m kat, the manager of ‘kat’s blog.<\/p>\n

This time, which is the fifth installment of the ‘Programming Lessons’ series, I will be talking about associative arrays<\/span>.<\/p>\n

Last time on the fourth article<\/a>, we learned about arrays, in which you can put in multiple values, but this time we will be learning about associative arrays<\/span> which are even more easier to use.<\/p>\n

It is used a lot in programming, so let’s try to remember it!<\/p>\n\n\n

What we will use this time<\/strong><\/h2>\n\n\n

<\/p>\n

programming language<\/div>

This time we will use the following programming language to write out a program.<\/p>\n

\n

\u30fbPHP<\/p>\n<\/div>\n

<\/p><\/div><\/p>\n

programming environment<\/div>

<\/p>\n

Let’s use the paiza website which is listed below for executing the program.<\/p>\n

paiza website<\/a><\/span><\/span><\/p>\n

For those who are using this website for the first time, the way to use it is listed in the page below, so please check it out.<\/p>\n

https:\/\/katblog.manadream.net\/index.php\/2020\/06\/09\/how-to-use-paiza-io\/<\/p>\n

<\/p><\/div><\/p>\n\n\n

Reviewing arrays<\/h2>\n\n\n

Last time I mentioned that arrays are like a container that can hold multiple values. For example, the first value could be ‘apple,’ and the second value could be ‘orange.’<\/p>\n

\"\"<\/p>\n

Also, I explained that arrays each have a number (starting from 0), and each of them are called a ‘key.’<\/p>\n

In the case of arrays, because the keys are automatically attached, you do not need to enter them in the source code.<\/p>\n

Now then, let’s review the source code of arrays.<\/p>\n\n

\n<?php\n $array = ['apple', 'orange', 'banana', 'strawberry']; \/\/ Automatically the keys \u300c0\u300d\u300c1\u300d\u300c2\u300d\u300c3\u300dare attached\n \n echo $array[1];\n<\/pre><\/div>\n\n
When you run the above source code, keys are automatically attached, so ‘orange<\/span>‘ which has the key of ‘1’ should be displayed.<\/p>\n
\n
Arrays are used a lot when creating groups of things that are the same kind.<\/p>\n
For instance, a group of fruit (apple, orange, banana, etc.), a group of animals (dog, cat, elephant, etc.), or a group of vehicles (car, train, airplane, etc.).<\/p>\n<\/div>\n\n\n
What are associative arrays?<\/h2>\n\n\n
Just like arrays, associative arrays are a container which you can enter multiple values<\/strong>.<\/p>\n
However, the difference between arrays are that you can name the keys as you like.<\/span><\/p>\n
\"\"<\/p>\n
Looking at the example above, in the key titled ‘name,’ there is ‘Bobby,’ and in the ‘age’ key there is the value ’10.’<\/p>\n
In this example, the information of a person has been put together as an associative array.<\/span><\/p>\n
Because the keys are letters instead of numbers, you can understand the information just by looking at the keys.<\/p>\n
Now then, let’s take a look at the source code of an associative array.<\/p>\n\n
\n <?php\n $user = [\n  'name' => 'Bobby',\n  'age' => '10',\n  'gender' => 'male',\n  'favorite color' => 'blue'\n ];\n  \n echo $user['gender'];\n<\/pre><\/div>\n\n
If you run the source code above, the ‘male<\/span>‘ value which is in the ‘gender’ key will be displayed.<\/p>\n
\n
As shown, associative arrays are useful to keep together the information of people and things<\/span>.<\/p>\n
For instance, product (name of product, price, expiration date, etc.) ,etc.<\/p>\n<\/div>\n\n\n
Final thoughts<\/h2>\n\n\n
Thank you for reading to the end of this lesson this time as well.<\/p>\n
In this lesson we covered arrays and associative arrays. It isn’t a matter of which is better, and it is important to be able to use whichever matches your purpose best.<\/p>\n
Arrays and associative arrays always pop up<\/span> when doing programming, so let’s make sure to remember them!<\/p>\n
See you next time!<\/p>\n\n\n
\n\n\n\n
\n
\n
<< previous article<\/a><\/div>\n\n\n\n
<\/p>\n<\/div>\n\n\n\n
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next article >><\/a><\/div>\n\n\n\n
<\/p>\n<\/div>\n<\/div>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Hello! I#8217;m kat, the manager of #8216;kat#8217;s blog. This time, which is the fifth installment of the<\/p>\n","protected":false},"author":1,"featured_media":4157,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_locale":"ja","_original_post":"https:\/\/katblog.manadream.net\/?p=3712","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[102],"tags":[107,108],"class_list":["post-3712","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming-lessons","tag-english","tag-programming","ja"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/katblog.manadream.net\/wp-content\/uploads\/2020\/10\/array2.png","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paUgnN-XS","_links":{"self":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts\/3712"}],"collection":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/comments?post=3712"}],"version-history":[{"count":17,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts\/3712\/revisions"}],"predecessor-version":[{"id":3943,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/posts\/3712\/revisions\/3943"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/media\/4157"}],"wp:attachment":[{"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/media?parent=3712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/categories?post=3712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/katblog.manadream.net\/index.php\/wp-json\/wp\/v2\/tags?post=3712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}