{"id":27014,"date":"2022-12-21T21:15:13","date_gmt":"2022-12-21T15:45:13","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/"},"modified":"2022-12-21T21:15:13","modified_gmt":"2022-12-21T15:45:13","slug":"solved-how-to-simplify-the-default-implementation-of-a-kotlin-function","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/","title":{"rendered":"[Solved] How to simplify the default implementation of a kotlin function"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-47725098\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"47725098\" data-parentid=\"47725006\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<blockquote>\n<p>Oh,yeah.I simplified a bit of code.<\/p>\n<\/blockquote>\n<pre><code>fun paidMore(amount: Int, employee: Employee,\n                     predicate: (Int, Employee) -&gt; Boolean = { _, _ -&gt; employee.salary &gt; amount }\n        ): Boolean = predicate(amount, employee)\n<\/code><\/pre>\n<blockquote>\n<p>now,I simplified the code again<\/p>\n<\/blockquote>\n<pre><code>import org.jetbrains.spek.api.Spek\nimport org.jetbrains.spek.api.dsl.describe\nimport org.jetbrains.spek.api.dsl.it\nimport kotlin.test.assertFalse\nimport kotlin.test.assertTrue\n\nobject ClosureSpec : Spek({\n    describe(\"Test, add a default implementation to the function\") {\n        data class Employee(val name: String, val salary: Int) \/\/the model used to test\n\n        fun paidMore(amount: Int, employee: Employee,\n                     predicate: (Int) -&gt; Boolean = { _ -&gt; employee.salary &gt; amount }\n        ): Boolean = predicate(amount)\n\n        it(\"judging employee's salary level\") {\n            fun isHighPaid(employee: Employee): Boolean = paidMore(100, employee)\n            fun isHighPaid2(employee: Employee): Boolean = paidMore(100, employee) {amount -&gt;\n                employee.salary &gt; amount * 2\n            }\n\n            val employee = Employee(\"yuri\", 101)\n            assertTrue(isHighPaid(employee))\n            assertFalse(isHighPaid2(employee))\n\n            assertTrue(isHighPaid2(Employee(\"peter\", 201)))\n            assertFalse(isHighPaid2(Employee(\"jerry\", 200)))\n        }\n    }\n\n})\n<\/code><\/pre>\n<blockquote>\n<p>or else<\/p>\n<\/blockquote>\n<pre><code>import org.jetbrains.spek.api.Spek\nimport org.jetbrains.spek.api.dsl.describe\nimport org.jetbrains.spek.api.dsl.it\nimport kotlin.test.assertFalse\nimport kotlin.test.assertTrue\n\nobject ClosureSpec : Spek({\n    describe(\"Test, add a default implementation to the function\") {\n        data class Employee(val name: String, val salary: Int) \/\/the model used to test\n\n        \/\/judging employee's salary level\n        fun Employee.paidMore(amount: Int, predicate: (Int) -&gt; Boolean = { \n            this.salary &gt; it \n        }): Boolean = predicate(amount)\n\n        on(\"use the default implementation\") {\n            val amount = 100\n            fun Employee.isHighPaid() = paidMore(amount)\n\n            it(\"should all be passed\") {\n                assertTrue(Employee(\"Alice\", amount + 1).isHighPaid())\n                assertFalse(Employee(\"Alice\", amount - 1).isHighPaid())\n            }\n        }\n\n        on(\"override the default implementation\") {\n            val amount = 100\n            fun Employee.isHighPaid() = paidMore(amount) {\n                this.salary &gt; it * 2\n            }\n\n            it(\"should all be passed\") {\n                assertTrue(Employee(\"Bob\", amount * 2 + 1).isHighPaid())\n                assertFalse(Employee(\"Bob\", amount * 2 - 1).isHighPaid())\n            }\n        }\n    }\n})\n<\/code><\/pre>\n<blockquote>\n<p>Which one is better? something else? Looking forward to your good idea<\/p>\n<\/blockquote><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to simplify the default implementation of a kotlin function <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Oh,yeah.I simplified a bit of code. fun paidMore(amount: Int, employee: Employee, predicate: (Int, Employee) -&gt; Boolean = { _, _ -&gt; employee.salary &gt; amount } ): Boolean = predicate(amount, employee) now,I simplified the code again import org.jetbrains.spek.api.Spek import org.jetbrains.spek.api.dsl.describe import org.jetbrains.spek.api.dsl.it import kotlin.test.assertFalse import kotlin.test.assertTrue object ClosureSpec : Spek({ describe(&#8220;Test, add a default implementation &#8230; <a title=\"[Solved] How to simplify the default implementation of a kotlin function\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\" aria-label=\"More on [Solved] How to simplify the default implementation of a kotlin function\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[600],"class_list":["post-27014","post","type-post","status-publish","format-standard","hentry","category-solved","tag-kotlin"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How to simplify the default implementation of a kotlin function - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to simplify the default implementation of a kotlin function - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Oh,yeah.I simplified a bit of code. fun paidMore(amount: Int, employee: Employee, predicate: (Int, Employee) -&gt; Boolean = { _, _ -&gt; employee.salary &gt; amount } ): Boolean = predicate(amount, employee) now,I simplified the code again import org.jetbrains.spek.api.Spek import org.jetbrains.spek.api.dsl.describe import org.jetbrains.spek.api.dsl.it import kotlin.test.assertFalse import kotlin.test.assertTrue object ClosureSpec : Spek({ describe(&quot;Test, add a default implementation ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-21T15:45:13+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] How to simplify the default implementation of a kotlin function\",\"datePublished\":\"2022-12-21T15:45:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\"},\"wordCount\":52,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"kotlin\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\",\"name\":\"[Solved] How to simplify the default implementation of a kotlin function - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-12-21T15:45:13+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] How to simplify the default implementation of a kotlin function\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] How to simplify the default implementation of a kotlin function - JassWeb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] How to simplify the default implementation of a kotlin function - JassWeb","og_description":"[ad_1] Oh,yeah.I simplified a bit of code. fun paidMore(amount: Int, employee: Employee, predicate: (Int, Employee) -&gt; Boolean = { _, _ -&gt; employee.salary &gt; amount } ): Boolean = predicate(amount, employee) now,I simplified the code again import org.jetbrains.spek.api.Spek import org.jetbrains.spek.api.dsl.describe import org.jetbrains.spek.api.dsl.it import kotlin.test.assertFalse import kotlin.test.assertTrue object ClosureSpec : Spek({ describe(\"Test, add a default implementation ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/","og_site_name":"JassWeb","article_published_time":"2022-12-21T15:45:13+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] How to simplify the default implementation of a kotlin function","datePublished":"2022-12-21T15:45:13+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/"},"wordCount":52,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["kotlin"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/","url":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/","name":"[Solved] How to simplify the default implementation of a kotlin function - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-12-21T15:45:13+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-simplify-the-default-implementation-of-a-kotlin-function\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] How to simplify the default implementation of a kotlin function"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/27014","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=27014"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/27014\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=27014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=27014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=27014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}