Ruby - Merge two arrays and remove values that have duplicate

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I have two arrays

a = [1, 2, 3, 4, 5]

b = [2, 4, 6]

I would like to merge the two arrays, then remove the values that is the same with other array. The result should be:

c = [1, 3, 5, 6]

I've tried subtracting the two array and the result is [1, 3, 5]. I also want to get the values from second array which has not duplicate from the first array..


You can do the following!

# Merging
c = a + b
 => [1, 2, 3, 4, 5, 2, 4, 6]
# Removing the value of other array
# (a & b) is getting the common element from these two arrays
c - (a & b)
=> [1, 3, 5, 6]

Dmitri's comment is also same though I came up with my idea independently.

Remove duplicate elements from array in Ruby, How do you merge two arrays into one while also remove duplicates? And you might also need to combine two arrays into a single one. Here is the command we usually go for a=[0,1,2,3,4] b = [2,3,4,5,6,7,8,9,0] c = a+b But the problem with this is the fact that the resulting array "c" would still have duplicate elements. And in most of the case you might need to remove the duplicate elements.


Use Array#uniq.

a = [1, 3, 5, 6]
b = [2, 3, 4, 5]

c = (a + b).uniq
=> [1, 3, 5, 6, 2, 4]

How to Combine Arrays in Ruby, How do you remove duplicates from an array in Ruby? Ruby Remove Duplicates From Array. Use the uniq method to remove duplicate elements from arrays with minimal code. Remove duplicates.


How about this.

(a | b)
=> [1, 2, 3, 4, 5, 6]
(a & b)
=> [2, 4]

(a | b) - (a & b)
[1, 3, 5, 6]

Documentation for | method Documentation for & method

Advanced Ruby Arrays, contain the same number of elements and the same contents for each corresponding element. Ruby-Merge two arrays and remove values that have duplicate (4) . I have two arrays. a = [1, 2, 3, 4, 5] b = [2, 4, 6]. I would like to merge the two arrays, then


Same as Array#uniq:

a = [1, 3, 5, 6]
b = [2, 3, 4, 5]

a|b
=> [1, 3, 5, 6, 2, 4]

Source

Combine two arrays into single and remove the duplicate with one, And you might also need to combine two arrays into a single one. Here is the And in most of the case you might need to remove the duplicate elements. So we end up This is an awesome shortcut to use in your daily ruby development. You could iterate through the array and filter out the duplicates, but Ruby’s uniq method makes that a lot easier. The uniq method returns a new array with all duplicate values removed. [1,2,3,4,1,5,3].uniq # [1,2,3,4,5] Sometimes, when you merge two sets of data, you’ll end up with duplicates. Take these two arrays of sharks:


Let's have two array

p = [1, 2, 5, 4, 8, 9]
q = [5, 6, 4, 8, 5, 3]

(p+q).uniq or (p.concat(q)).uniq

=> [1, 2, 5, 4, 8, 9, 6, 3]

Also p|q can do the job! Decide which one suits for you.

How to remove duplicate elements from an array after combining , Arrays in Ruby can be concatenated using a number of different approaches. The uniq method of the Array class can be used to remove duplicated elements from an array. An array in Ruby can be treated as a Last In First Out stack where items are pushed onto and popped off the array. The two arrays were combined, the first element being a list of all elements in the first position of both arrays. Zipping is a bit of a strange operation and you may not find much use for it. Its purpose is to combine two arrays whose elements closely correlate.


How to Use The Ruby Uniq Method To Remove Duplicates, Hi all, I have several arrays in these format: a=[ [10,2,3,2012,], [20,3,4,2012], [3,4 How to remove duplicate elements from an array after combining values. iterate over each such hash-value containing more than 1 entry to "How do I check an array for duplicates?" is not quite the same question as "How to find and return a duplicate value in an array?". This question is asking how to determine the uniqueness of the array, whereas the other is asking how to pull duplicate values out of the array.


Ruby Remove Duplicates From Array, How to Use The Ruby Uniq Method To Remove Duplicates n = [1,1,1,2,3,4,5] When you call uniq , it works by making a hash out of your array elements. Because hash keys are unique, we can get a list of all the keys in the hash, this list  Here is a slightly different take on the loop. With some of the optimizations in the latest version of Chrome, it is the fastest method for resolving the union of the two arrays (Chrome 38.0.2111).


Combining Arrays Without Duplicates ― Scotch.io, Let us begin with a couple arrays. We first create an array containing integers. The array has two duplicated numbers: a 2 and a 3. We invoke the "uniq!" method​  I'm having issues trying to figure out how to remove duplicate elements when merging two arrays. The problem I am working on is as follows: Write a program that reads in two arrays (a1 and a2) of numbers and creates a new array (a3) of numbers such that the new array contains all the unique numbers of a1 and a2.