Question 1

What is inject in Ruby?

Accepted Answer

Inject applies the block result + element. to each item in the array. For the next item ("element"), the value returned from the block is "result". The way you've called it (with a parameter), "result" starts with the value of that parameter. So the effect is adding the elements up.

Question 2

What is reduce in Ruby?

Accepted Answer

Reduce, or inject, is a useful method in any programming language but we 'll focus on ruby for now. Reduce is an enumerable method that can be used on hashes or arrays to reduce them into a single value or object. Say you wanted to get the sum of an array without the reduce method.

Question 3

How do you sum in Ruby?

Accepted Answer

Ruby | Enumerable sum() functionThe sum() of enumerable is an inbuilt method in Ruby returns the sum of all the elements in the enumerable. If a block is given, the block is applied to the enumerable, then the sum is computed. If the enumerable is empty, it returns init. Parameters: The function accepts a block.

Question 4

What is inject and reduce in Ruby?

Accepted Answer

Ruby Language Inject, reduce. Example. Inject and reduce are different names for the same thing. In other languages these functions are often called folds (like foldl or foldr). These methods are available on every Enumerable object. Inject takes a two argument function and applies that to all of the pairs of elements in the Array.

Question 5

What is the difference between inject () and reduce () in Python?

Accepted Answer

Inject and reduce are different names for the same thing. In other languages these functions are often called folds (like foldl or foldr). These methods are available on every Enumerable object. Inject takes a two argument function and applies that to all of the pairs of elements in the Array.

Question 6

How does the inject method work in C++?

Accepted Answer

The inject method takes a block of two arguments. The first argument is an accumulator, the running total of the expression being evaluated, and the second is the current array item. In the example above, the initial value is 0.

Question 7

How to add all the elements in an array using inject?

Accepted Answer

Inject takes a two argument function and applies that to all of the pairs of elements in the Array. For the array [1, 2, 3] we can add all of these together with the starting value of zero by specifying a starting value and block like so:

Is inject the same thing as reduce in ruby?

Tags:

alias

ruby

inject

reduce

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