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A common scenario that arises when using a collection of any sort, is to get perform a single type of operation with all the elements and collect the result. For example, a sum(array) function might wish to add all the elements passed as the array and return the result.
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In the previous challenge, we learned about each method being central to all of the methods provided by Enumerable class. One of such useful methods is each_with_index which allows you to iterate over items along with an index keeping count of the item. For example,> colors = ['
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In this tutorial, we'll learn about the methods in String class that help us to search and replace portions of the string based on a text or pattern. * String.include?(string) - Returns true if str contains the given string or character. Very simple! > "hello"
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In our encoding tutorial, we learned about the different ways Ruby 1.8 and Ruby 1.9 (and higher versions) represent strings internally. The major difference is a wide range of encoding (non-ascii) support in the later versions. This change, however, also overhauls the way strings were iterated between the
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When you index a string, you extract or alter the portions. This is perhaps the most important operation you want to perform on strings. The string class provides a convenient array-like square bracket [] operator, which allows you to extract portions of the string as well as altering the content when
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In Ruby, strings are objects of the String class, which defines a powerful set of operations and methods for manipulating text (e.g., indexing, searching, modifying, etc.). Here are a few easy ways to create Strings:my_string = "Hello." # create a string from a literalmy_empty_string = String.
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Numbers, boolean values and strings are some of the fundamental data types that we have explored in our previous challenges. In this set of tutorials, we turn our attention to the data type referred to as String or Textliterals. String data types are a sequence of characters, each of which
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In Partial Application, we create a lambda that takes a parameter and returns a lambda that does something with it. Example: multiply_function = -> (number) do -> (another_number) do number * another_number end end doubler = multiply_function.(2) tripler = multiply_function.(3) puts doubler.(4) puts tripler.