uniq
explain one expression of Ruby Array uniq method
c = %w(a b c d) 1.8.7 :025 > c.uniq {|x|x[/^a/]} => [\"a\", \"b\"] 1.8.7 :026 > c.uniq {|x|x[/^b/]}[详细]
2023-04-13 05:41 分类：问答Replacing an SQL query with unix sort, uniq and awk
We currently have some data on an HDFS cluster on which we generate reports using Hive. The infrastructure is in the process of being decommissioned and we are left with the task of coming up with an[详细]
2023-03-28 10:34 分类：问答Ruby, get uniq slice from combination
What I have a = [1,2,3,4] => [1, 2, 3, 4] b = a.combination(2).to_a => [[1, 2], [1, 3], [1, 4], [2, 3], [2, 4], [3, 4]][详细]
2023-03-16 06:42 分类：问答how to sort based on a column but uniq based on another column?
He all, I have a file having some columns开发者_StackOverflow中文版. I would like to do sort for column 2 then apply uniq for column 1. I found this post talking about sort and uniq for the same colum[详细]
2023-03-12 01:48 分类：问答Print the first line of uniq output
>cat testing.txt aaa bbb aaa ccc xxx yyy zzz ppp uuu vvv uuu ttt I want to display the uniq lines based on the first field and output oly the first occurence of the line[详细]
2023-02-22 01:32 分类：问答Removing lines containing a unique first field with awk?
Looking to print only lines that have a du开发者_如何学运维plicate first field. e.g. from data that looks like this:[详细]
2023-02-13 18:08 分类：问答uniq : only when different by more than 1 character OR case
I got a text file with LOTS of names. I wanta list of all the strings(lines) that is eithe开发者_StackOverflow中文版r[详细]
2023-01-22 06:49 分类：问答Sort & uniq in Linux shell
What is the difference between the following to commands? sort -u 开发者_JAVA百科FILE sort FILE | uniq[详细]
2023-01-09 14:33 分类：问答How to make C program wait (on Linux)?
How to make C program wait (on Lin开发者_运维知识库ux)? (I need to use wait with MPI - I need C code please)If you want to wait for a MPI request use MPI_Wait: http://www.manpagez.com/man/3/MPI_Wait/[详细]
2022-12-25 17:01 分类：问答
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