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What is a unix command for deleting the first N characters of a line?
... be the best tool for this as it can both filter and perform the necessary string manipulation functions on filtered lines:
tail -f logfile | awk '/org.springframework/ {print substr($0, 6)}'
or
tail -f logfile | awk '/org.springframework/ && sub(/^.{5}/,"",$0)'
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What is the “right” way to iterate through an array in Ruby?
...out creating an array (consider 0..1000000000)
working for any Range (e.g. Strings, not just Integers)
without using any extra object oriented power (i.e. no class modification)
I believe this is impossible without defining a pred method, which means modifying the Range class to use it. If you ca...
Remove all special characters except space from a string using JavaScript
I want to remove all special characters except space from a string using JavaScript.
11 Answers
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How to unzip a file using the command line? [closed]
...zip
Complete set of options for the jar tool available here.
Examples:
Extract jar file
jar x[v]f jarfile [inputfiles] [-Joption]
jar x[v] [inputfiles] [-Joption]
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Change URL parameters
...t that weird stuff out of your URL. Or, in other words, "change your query-string to use only valid UTF-8 characters". :) F8 alone isn't a valid UTF-8 character.
– Matthew Flaschen
Jul 7 '09 at 9:51
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Insert line after first match using sed
...t inserting a choice line of text after the first line matching a specific string using the sed command. I have ...
8 An...
Count number of occurrences of a given substring in a string
How can I count the number of times a given substring is present within a string in Python?
35 Answers
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Postgresql aggregate array
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What I understand you can do something like this:
SELECT p.p_name,
STRING_AGG(Grade.Mark, ',' ORDER BY Grade.Mark) As marks
FROM Student
LEFT JOIN Grade ON Grade.Student_id = Student.Id
GROUP BY Student.Name;
EDIT
I am not sure. But maybe something like this then:
SELECT p.p_name,
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Why is the default value of the string type null instead of an empty string?
It's quite annoying to test all my strings for null before I can safely apply methods like ToUpper() , StartWith() etc...
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How to remove the hash from window.location (URL) with JavaScript without page refresh?
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Use this line to make sure you don't lose the query string: history.pushState("", document.title, window.location.pathname + window.location.search);
– Phil Kulak
Mar 13 '12 at 15:56
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