{"id":214725,"date":"2025-05-15T09:32:34","date_gmt":"2025-05-15T09:32:34","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=214725"},"modified":"2025-05-15T09:32:36","modified_gmt":"2025-05-15T09:32:36","slug":"n-this-exercise-you-are-given-a-three-word-phrase-and-an-integer-referencing-one-of-the-three-words","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/15\/n-this-exercise-you-are-given-a-three-word-phrase-and-an-integer-referencing-one-of-the-three-words\/","title":{"rendered":"n this exercise, you are given a three word phrase and an integer referencing one of the three words"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">n this exercise, you are given a three word phrase and an integer referencing one of the three words. Return the phrase with the reference word doubled.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<br>\u201cdouble_word(\u201cone two three\u201d, 3) \u2013&gt; \u201cone two three three\u201d<br>double_word(\u201ccat dog fish\u201d, 2) \u2013&gt; \u201ccat dog dog fish\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">def double_word(phrase, ref):<br>pass<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sure! Here&#8217;s the correct Python function to solve the problem, followed by a detailed explanation:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def double_word(phrase, ref):\n    # Split the phrase into words\n    words = phrase.split()\n    \n    # Adjust the reference index to zero-based index\n    index = ref - 1\n    \n    # Insert the referenced word again right after its original position\n    words.insert(index + 1, words&#91;index])\n    \n    # Join the words back into a single string and return\n    return \" \".join(words)\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation (300+ words):<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This problem requires taking a phrase composed of exactly three words and doubling one of those words based on a given reference number (<code>ref<\/code>). The reference number indicates which word (1, 2, or 3) in the phrase should be duplicated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s break down the problem step-by-step:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Input and output:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Input: A string <code>phrase<\/code> containing exactly three words separated by spaces, and an integer <code>ref<\/code> which can be 1, 2, or 3.<\/li>\n\n\n\n<li>Output: A string where the word at position <code>ref<\/code> is duplicated immediately after itself.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Splitting the phrase:<\/strong><br>To manipulate individual words, we need to split the phrase into a list of words. Using Python&#8217;s <code>split()<\/code> method on the string creates a list of words. For example, <code>\"one two three\".split()<\/code> returns <code>[\"one\", \"two\", \"three\"]<\/code>.<\/li>\n\n\n\n<li><strong>Indexing adjustment:<\/strong><br>In the problem, the <code>ref<\/code> is 1-based indexing, meaning <code>ref=1<\/code> corresponds to the first word, <code>ref=2<\/code> the second, and so on. Python lists, however, use 0-based indexing, so we adjust by subtracting 1 to find the correct index in the list: <code>index = ref - 1<\/code><\/li>\n\n\n\n<li><strong>Duplicating the word:<\/strong><br>We want to insert a duplicate of the word at position <code>index<\/code> immediately after it. Python lists provide the <code>insert()<\/code> method, which inserts an element at a specified position. We insert the word at <code>index + 1<\/code>, which is right after the original word. For example, if <code>index=1<\/code> (second word), inserting at position <code>2<\/code> duplicates the second word right after itself. <code>words.insert(index + 1, words[index])<\/code><\/li>\n\n\n\n<li><strong>Rebuilding the phrase:<\/strong><br>After modifying the list, we convert it back into a string using <code>\" \".join(words)<\/code>. This joins all words with spaces in between.<\/li>\n\n\n\n<li><strong>Returning the result:<\/strong><br>The final string is returned from the function.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example walkthrough:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Input: <code>\"cat dog fish\"<\/code>, <code>ref=2<\/code><\/li>\n\n\n\n<li>Split: <code>[\"cat\", \"dog\", \"fish\"]<\/code><\/li>\n\n\n\n<li>Index: <code>2 - 1 = 1<\/code><\/li>\n\n\n\n<li>Insert <code>\"dog\"<\/code> at position <code>2<\/code>: list becomes <code>[\"cat\", \"dog\", \"dog\", \"fish\"]<\/code><\/li>\n\n\n\n<li>Join: <code>\"cat dog dog fish\"<\/code><\/li>\n\n\n\n<li>Output: <code>\"cat dog dog fish\"<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">This solution works efficiently, is clear, and directly follows from the problem requirements. It can be easily extended for phrases longer than three words by removing the assumption on length. The key learning is handling 1-based versus 0-based indexing and using list insertions in Python.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>n this exercise, you are given a three word phrase and an integer referencing one of the three words. Return the phrase with the reference word doubled. Example:\u201cdouble_word(\u201cone two three\u201d, 3) \u2013&gt; \u201cone two three three\u201ddouble_word(\u201ccat dog fish\u201d, 2) \u2013&gt; \u201ccat dog dog fish\u201d def double_word(phrase, ref):pass The Correct Answer and Explanation is: Sure! Here&#8217;s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-214725","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/214725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=214725"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/214725\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=214725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=214725"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=214725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}