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<title>Programming &amp; Software Q&amp;A | CollectiveSolver - Recent questions tagged ruby</title>
<link>https://collectivesolver.com/tag/ruby</link>
<description>Powered by Question2Answer</description>
<item>
<title>How to use higher-order functions in Ruby</title>
<link>https://collectivesolver.com/98138/how-to-use-higher-order-functions-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/98138/how-to-use-higher-order-functions-in-ruby</guid>
<pubDate>Thu, 04 Jun 2026 13:28:58 +0000</pubDate>
</item>
<item>
<title>How to use closure in Ruby</title>
<link>https://collectivesolver.com/98081/how-to-use-closure-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/98081/how-to-use-closure-in-ruby</guid>
<pubDate>Tue, 02 Jun 2026 16:03:29 +0000</pubDate>
</item>
<item>
<title>How to use an anonymous function in Ruby</title>
<link>https://collectivesolver.com/98045/how-to-use-an-anonymous-function-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/98045/how-to-use-an-anonymous-function-in-ruby</guid>
<pubDate>Tue, 02 Jun 2026 08:14:19 +0000</pubDate>
</item>
<item>
<title>How to remove parentheses and the text inside them from a string in Ruby</title>
<link>https://collectivesolver.com/98010/how-to-remove-parentheses-and-the-text-inside-them-from-a-string-in-ruby</link>
<description></description>
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<pubDate>Mon, 01 Jun 2026 09:10:06 +0000</pubDate>
</item>
<item>
<title>How to find the day of the week on any given date in Ruby</title>
<link>https://collectivesolver.com/97978/how-to-find-the-day-of-the-week-on-any-given-date-in-ruby</link>
<description></description>
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<pubDate>Sun, 31 May 2026 09:43:15 +0000</pubDate>
</item>
<item>
<title>How to convert only the date without time to a string in Ruby</title>
<link>https://collectivesolver.com/97946/how-to-convert-only-the-date-without-time-to-a-string-in-ruby</link>
<description></description>
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<pubDate>Sun, 31 May 2026 05:56:01 +0000</pubDate>
</item>
<item>
<title>How to calculate % change from X to Y in Ruby</title>
<link>https://collectivesolver.com/97897/how-to-calculate-%25-change-from-x-to-y-in-ruby</link>
<description></description>
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<pubDate>Fri, 29 May 2026 15:06:33 +0000</pubDate>
</item>
<item>
<title>How to calculate the number of days until Christmas from today in Ruby</title>
<link>https://collectivesolver.com/97853/how-to-calculate-the-number-of-days-until-christmas-from-today-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97853/how-to-calculate-the-number-of-days-until-christmas-from-today-in-ruby</guid>
<pubDate>Fri, 29 May 2026 05:56:08 +0000</pubDate>
</item>
<item>
<title>How to measure function execution time in Ruby</title>
<link>https://collectivesolver.com/97817/how-to-measure-function-execution-time-in-ruby</link>
<description></description>
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<pubDate>Thu, 28 May 2026 08:37:05 +0000</pubDate>
</item>
<item>
<title>How to print every month in a specified year that contains five full weekends (Fri, Sat, Sun) in Ruby</title>
<link>https://collectivesolver.com/97772/how-to-print-every-month-in-a-specified-year-that-contains-five-full-weekends-fri-sat-sun-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97772/how-to-print-every-month-in-a-specified-year-that-contains-five-full-weekends-fri-sat-sun-in-ruby</guid>
<pubDate>Wed, 27 May 2026 05:32:03 +0000</pubDate>
</item>
<item>
<title>How to transpose a matrix (swap rows and columns) in Ruby</title>
<link>https://collectivesolver.com/97725/how-to-transpose-a-matrix-swap-rows-and-columns-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97725/how-to-transpose-a-matrix-swap-rows-and-columns-in-ruby</guid>
<pubDate>Tue, 26 May 2026 05:32:39 +0000</pubDate>
</item>
<item>
<title>How to implement matrix multiplication in Ruby</title>
<link>https://collectivesolver.com/97702/how-to-implement-matrix-multiplication-in-ruby</link>
<description></description>
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<pubDate>Mon, 25 May 2026 08:38:36 +0000</pubDate>
</item>
<item>
<title>How to calculate the dot product of two arrays in Ruby</title>
<link>https://collectivesolver.com/97690/how-to-calculate-the-dot-product-of-two-arrays-in-ruby</link>
<description></description>
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<pubDate>Sun, 24 May 2026 13:28:44 +0000</pubDate>
</item>
<item>
<title>How to find the dates of the last Sunday of each month of a given year in Ruby</title>
<link>https://collectivesolver.com/97682/how-to-find-the-dates-of-the-last-sunday-of-each-month-of-a-given-year-in-ruby</link>
<description></description>
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<pubDate>Sun, 24 May 2026 09:04:49 +0000</pubDate>
</item>
<item>
<title>How to find the dates of the last Fridays of each month of a given year in Ruby</title>
<link>https://collectivesolver.com/97647/how-to-find-the-dates-of-the-last-fridays-of-each-month-of-a-given-year-in-ruby</link>
<description></description>
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<pubDate>Sat, 23 May 2026 13:59:23 +0000</pubDate>
</item>
<item>
<title>How to find keyword matching between multiple text blocks in Ruby</title>
<link>https://collectivesolver.com/97607/how-to-find-keyword-matching-between-multiple-text-blocks-in-ruby</link>
<description></description>
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<pubDate>Fri, 22 May 2026 13:56:12 +0000</pubDate>
</item>
<item>
<title>How to sort the words in a string with Ruby</title>
<link>https://collectivesolver.com/97567/how-to-sort-the-words-in-a-string-with-ruby</link>
<description></description>
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<pubDate>Thu, 21 May 2026 14:37:05 +0000</pubDate>
</item>
<item>
<title>How to use the full strftime cheat sheet in Ruby</title>
<link>https://collectivesolver.com/97548/how-to-use-the-full-strftime-cheat-sheet-in-ruby</link>
<description></description>
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<pubDate>Thu, 21 May 2026 05:24:50 +0000</pubDate>
</item>
<item>
<title>How to format a date using different formats in Ruby</title>
<link>https://collectivesolver.com/97538/how-to-format-a-date-using-different-formats-in-ruby</link>
<description></description>
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<pubDate>Wed, 20 May 2026 16:04:14 +0000</pubDate>
</item>
<item>
<title>How to convert seconds into weeks, days, hours, minutes, and seconds in Ruby</title>
<link>https://collectivesolver.com/97504/how-to-convert-seconds-into-weeks-days-hours-minutes-and-seconds-in-ruby</link>
<description></description>
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<pubDate>Wed, 20 May 2026 08:32:13 +0000</pubDate>
</item>
<item>
<title>How to sort a list of files by name, extension, dates, and size in Ruby</title>
<link>https://collectivesolver.com/97455/how-to-sort-a-list-of-files-by-name-extension-dates-and-size-in-ruby</link>
<description></description>
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<pubDate>Sun, 17 May 2026 12:49:43 +0000</pubDate>
</item>
<item>
<title>How to create a list of random file names, including extension, dates, and file size in Ruby</title>
<link>https://collectivesolver.com/97424/how-to-create-a-list-of-random-file-names-including-extension-dates-and-file-size-in-ruby</link>
<description></description>
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<pubDate>Sat, 16 May 2026 09:14:54 +0000</pubDate>
</item>
<item>
<title>How to create a list of random dates in Ruby</title>
<link>https://collectivesolver.com/97389/how-to-create-a-list-of-random-dates-in-ruby</link>
<description></description>
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<pubDate>Sat, 16 May 2026 05:31:08 +0000</pubDate>
</item>
<item>
<title>How to compress and decompress repeated string characters by storing the repeated length (RLE) in Ruby</title>
<link>https://collectivesolver.com/97342/how-to-compress-and-decompress-repeated-string-characters-by-storing-the-repeated-length-rle-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97342/how-to-compress-and-decompress-repeated-string-characters-by-storing-the-repeated-length-rle-in-ruby</guid>
<pubDate>Thu, 14 May 2026 08:08:10 +0000</pubDate>
</item>
<item>
<title>How to calculate the 100th term of the sequence 8, 64, 80, 136, 152 in Ruby</title>
<link>https://collectivesolver.com/97283/how-to-calculate-the-100th-term-of-the-sequence-8-64-80-136-152-in-ruby</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97283/how-to-calculate-the-100th-term-of-the-sequence-8-64-80-136-152-in-ruby</guid>
<pubDate>Tue, 12 May 2026 13:55:29 +0000</pubDate>
</item>
<item>
<title>How to convert an array of multi‑digit numbers to a number in Ruby</title>
<link>https://collectivesolver.com/97211/how-to-convert-an-array-of-multi-digit-numbers-to-a-number-in-ruby</link>
<description></description>
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<pubDate>Sun, 10 May 2026 18:18:06 +0000</pubDate>
</item>
<item>
<title>How to convert an array of digits to a number in Ruby</title>
<link>https://collectivesolver.com/97205/how-to-convert-an-array-of-digits-to-a-number-in-ruby</link>
<description></description>
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<pubDate>Sun, 10 May 2026 15:12:55 +0000</pubDate>
</item>
<item>
<title>How to get accurate ticks from a timer (high‑resolution timer) in Ruby</title>
<link>https://collectivesolver.com/97167/how-to-get-accurate-ticks-from-a-timer-high-resolution-timer-in-ruby</link>
<description></description>
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<pubDate>Sat, 09 May 2026 14:11:45 +0000</pubDate>
</item>
<item>
<title>How to implement the binary search algorithm in Ruby</title>
<link>https://collectivesolver.com/97141/how-to-implement-the-binary-search-algorithm-in-ruby</link>
<description></description>
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<pubDate>Fri, 08 May 2026 15:47:04 +0000</pubDate>
</item>
<item>
<title>How to calculate the CRC32 of a string in Ruby</title>
<link>https://collectivesolver.com/97137/how-to-calculate-the-crc32-of-a-string-in-ruby</link>
<description></description>
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<pubDate>Fri, 08 May 2026 15:06:47 +0000</pubDate>
</item>
<item>
<title>How to create a sorted unique list from a matrix in Ruby</title>
<link>https://collectivesolver.com/97094/how-to-create-a-sorted-unique-list-from-a-matrix-in-ruby</link>
<description></description>
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<pubDate>Thu, 07 May 2026 08:59:34 +0000</pubDate>
</item>
<item>
<title>How to create a common sorted unique array from 3 integer arrays in Ruby</title>
<link>https://collectivesolver.com/97062/how-to-create-a-common-sorted-unique-array-from-3-integer-arrays-in-ruby</link>
<description></description>
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<pubDate>Wed, 06 May 2026 13:45:55 +0000</pubDate>
</item>
<item>
<title>How to convert an integer into its written‑out English words in Ruby</title>
<link>https://collectivesolver.com/97022/how-to-convert-an-integer-into-its-written-out-english-words-in-ruby</link>
<description></description>
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<pubDate>Tue, 05 May 2026 09:09:06 +0000</pubDate>
</item>
<item>
<title>How to calculate all the less than 500 additive prime numbers in Ruby</title>
<link>https://collectivesolver.com/96990/how-to-calculate-all-the-less-than-500-additive-prime-numbers-in-ruby</link>
<description></description>
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<pubDate>Mon, 04 May 2026 16:01:02 +0000</pubDate>
</item>
<item>
<title>How to define a terabyte constant in Ruby</title>
<link>https://collectivesolver.com/96958/how-to-define-a-terabyte-constant-in-ruby</link>
<description></description>
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<pubDate>Sun, 03 May 2026 15:19:22 +0000</pubDate>
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<item>
<title>How to define an exabyte constant in Ruby</title>
<link>https://collectivesolver.com/96928/how-to-define-an-exabyte-constant-in-ruby</link>
<description></description>
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<pubDate>Sun, 03 May 2026 09:20:06 +0000</pubDate>
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<item>
<title>How to define a petabyte constant in Ruby</title>
<link>https://collectivesolver.com/96896/how-to-define-a-petabyte-constant-in-ruby</link>
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<pubDate>Sun, 03 May 2026 06:39:26 +0000</pubDate>
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<item>
<title>How to use math functions and constants in Ruby</title>
<link>https://collectivesolver.com/96779/how-to-use-math-functions-and-constants-in-ruby</link>
<description></description>
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<pubDate>Thu, 30 Apr 2026 16:40:24 +0000</pubDate>
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<item>
<title>How to create a function with an optional parameter in Ruby</title>
<link>https://collectivesolver.com/96728/how-to-create-a-function-with-an-optional-parameter-in-ruby</link>
<description></description>
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<pubDate>Wed, 29 Apr 2026 16:24:46 +0000</pubDate>
</item>
<item>
<title>How to decode Leet Speak (where numbers resemble letters (7-&gt;T, 1-&gt;I, 5-&gt;S, 3 -&gt; E)) in Ruby</title>
<link>https://collectivesolver.com/96638/how-to-decode-leet-speak-where-numbers-resemble-letters-7-t-1-i-5-s-3-e-in-ruby</link>
<description></description>
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<pubDate>Mon, 27 Apr 2026 15:18:28 +0000</pubDate>
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<item>
<title>How to reconstruct a full sparse matrix from a compact (triplet) matrix in Ruby</title>
<link>https://collectivesolver.com/96597/how-to-reconstruct-a-full-sparse-matrix-from-a-compact-triplet-matrix-in-ruby</link>
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<pubDate>Mon, 27 Apr 2026 05:39:01 +0000</pubDate>
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<item>
<title>How to express a decimal number as a fixed-length string with leading zeros in Ruby</title>
<link>https://collectivesolver.com/96581/how-to-express-a-decimal-number-as-a-fixed-length-string-with-leading-zeros-in-ruby</link>
<description></description>
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<pubDate>Sun, 26 Apr 2026 15:20:59 +0000</pubDate>
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<item>
<title>How to create an enumeration of constants with and without explicit values in Ruby</title>
<link>https://collectivesolver.com/96538/how-to-create-an-enumeration-of-constants-with-and-without-explicit-values-in-ruby</link>
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<pubDate>Sun, 26 Apr 2026 06:27:25 +0000</pubDate>
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<item>
<title>How to compact a sparse matrix in Ruby</title>
<link>https://collectivesolver.com/96492/how-to-compact-a-sparse-matrix-in-ruby</link>
<description></description>
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<pubDate>Fri, 24 Apr 2026 09:09:42 +0000</pubDate>
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<item>
<title>How to search for a word in a grid of characters with Ruby</title>
<link>https://collectivesolver.com/96452/how-to-search-for-a-word-in-a-grid-of-characters-with-ruby</link>
<description></description>
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<pubDate>Thu, 23 Apr 2026 09:54:40 +0000</pubDate>
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<item>
<title>How to write a loop with a specified step in Ruby</title>
<link>https://collectivesolver.com/95843/how-to-write-a-loop-with-a-specified-step-in-ruby</link>
<description></description>
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<pubDate>Fri, 10 Apr 2026 08:37:20 +0000</pubDate>
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<item>
<title>How to count backwards (Print the numbers N, N - 1, ..., 0 (included)) in Ruby</title>
<link>https://collectivesolver.com/88394/how-to-count-backwards-print-the-numbers-n-n-1-0-included-in-ruby</link>
<description></description>
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<pubDate>Sun, 20 Jul 2025 08:57:45 +0000</pubDate>
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<title>How to round a floating-point number to an integer in Ruby</title>
<link>https://collectivesolver.com/85292/how-to-round-a-floating-point-number-to-an-integer-in-ruby</link>
<description></description>
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<pubDate>Wed, 14 May 2025 13:52:53 +0000</pubDate>
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<item>
<title>How to use gets.chomp() inside a while loop in Ruby</title>
<link>https://collectivesolver.com/84582/how-to-use-gets-chomp-inside-a-while-loop-in-ruby</link>
<description></description>
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<pubDate>Sat, 26 Apr 2025 09:07:43 +0000</pubDate>
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<item>
<title>How to print array values and the indexes in Ruby</title>
<link>https://collectivesolver.com/83274/how-to-print-array-values-and-the-indexes-in-ruby</link>
<description></description>
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<pubDate>Sat, 22 Mar 2025 14:42:43 +0000</pubDate>
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