Ruby Loops: Repeating Something Many Times - RubyGuides

The Ruby Each Loop. The Ruby method each allows you to go over a list of items, without having to keep track of the number of iterations, or having to increase some kind of counter. It’s the Ruby way of doing “repeat until done”. Before you can use each, you need a collection of items like an array, a range or a hash. For example:

Ruby | Hash each() function - GeeksforGeeks

Hash#each () is a Hash class method which finds the nested value which calls block once for each key in hash by passing the key-value pair as parameters. Syntax: Hash.each () Parameter: Hash values. Return: calls block once for each key in hash otherwise Enumerator if no argument is passed.

Ruby | Loops (for, while, do..while, until) - GeeksforGeeks

The loops in Ruby are : The condition which is to be tested, given at the beginning of the loop and all statements are executed until the given boolean condition satisfies. When the condition becomes false, the control will be out from the while loop. It is also known as Entry Controlled Loop because the condition to be tested is present at the ...

Using the Each Method in Ruby - ThoughtCo

The each method takes two arguments—an element and a block. The element, contained within the pipes, is similar to a placeholder. Whatever you put inside the pipes is used in the block to represent each element of the array in turn. The block is the line of code that is executed on each of the array items and is handed the element to process.

Return values | Ruby for Beginners

Return values. In Ruby, a method always return exactly one single thing (an object). The returned object can be anything, but a method can only return one thing, and it also always returns something. Every method always returns exactly one object. The object returned could be the object nil, meaning “nothing”, but it still is an object.

loops - "for" vs "each" in Ruby - Stack Overflow

for: irb> for x in [1,2,3]; end => [1, 2, 3] irb> x => 3. With the for loop, the iterator variable still lives after the block is done. With the each loop, it doesn't, unless it was already defined as a local variable before the loop started. Other than that, for is just syntax sugar for the each method. When @collection is nil both loops throw ...

ruby - Why does Array#each return an array with the same elements ...

I'm learning the details of how each works in ruby, and I tried out the following line of code: p [1,2,3,4,5].each { |element| el } And the result is an array of [1,2,3,4,5] But I don't think I fully understand why. Why is the return value of each the same array? Doesn't each just provide a method for iterating?

[Ruby]return,break,next それぞれの処理の終わらせ方 - Qiita

なので、returnでeachの処理が終わった後、puts "Hello"されるわけではありません、ということです。 何か処理の中で使われていても、その処理だけを終わらせるのではなく、メソッドそのものを終わらせるのがreturn ですよ、ということですね。 breakについて

return/break/nextの使い方(Ruby) - Qiita

return. Rubyのようなオブジェクト指向の言語の関数をメソッドと呼ぶ. breakは式の値を戻り値としてメソッドを終了する. def ex 10.times do |i| if i == 7 return i end end end #メソッドexを実行します (戻り値はi) ex #=> 7 #戻り値を省略するとnilが返る def ex 10.times do |i| if i == 7 ...

Quick overview Ruby each_with_object method - Woman on Rails

Tips about each_with_object. Important note. When we use array << item ** 2 this command always returns all array, but for this second example hash[item] = item.to_s.upcase returns item.to_s.upcase not all hash so we need to remember about adding hash on the end.. And now the missing part for each_with_object.You can use this method also on hash not only on arrays or enumerators.
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