Getting lines with common emails

Getting Help
1

hi, so i am new to golang.i want to filter 2 files that i have. first contains list of emails (like 2 Million ish) and second contains email:hash (about 500k ish). i want to compare both files line by line if email 2nd file in in first file than i want to export that email:hash in to 3rd file. E.g
first.txt

testemail@test.com
test@gmail.com
test@yahoo.com
test@outlook.com
test@live.com

second.txt

test@yahoo.com:53534535$5435345
test@outlook.com:23534535$5864345
test1@outlook.com:23534535$586745
test5@outlook.com:23534535$5864345

it should output a third file with contents

test@yahoo.com:53534535$5435345
test@outlook.com:23534535$5864345

emails that are present in first file.

2

Hi! Are the two files ordered? (At least the second?) From what I see: no. Right?

3

Well, there are many ways to do that:

  1. First file2 and create a dictionary with email addr as key.
  2. Pass this dictionary to a routine that read file1 and search the current line in the map. It it is found, write it to third file

You can use goroutines and channels.

4

hello, they are not ordered.

6

My solution, try it. Compile and run giving it mails file, mails&hash file and output file paths

1 Like
7

@Metalymph ty mate. you are a savior.

1 Like
8

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