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Bash: Strip trailing linebreak from output
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If your expected output is a single line, you can simply remove all newline characters from the output. It would not be uncommon to pipe to the 'tr' utility, or to Perl if preferred:
wc -l < log.txt | tr -d '\n'
wc -l < log.txt | perl -pe 'chomp'
You can also use command substit...
count vs length vs size in a collection
...er of elements - check source/documentation.
Capacity() - used to specifically refer to allocated space in collection and not number of valid elements in it. If type has both "capacity" and "size" defined then "size" usually refers to number of actual elements.
I think the main point is down to hu...
Specifying colClasses in the read.csv
... the read.csv function in R. In my data, the first column "time" is basically a character vector while the rest of the columns are numeric.
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How to delete/create databases in Neo4j?
...s in the graph database Neo4j like in MySQL? Or, at least, how to delete all nodes and relationships of an existing graph to get a clean setup for tests, e.g., using shell commands similar to rmrel or rm ?
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HTML table with fixed headers?
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@tetra td { max-width: 30px; } this will allow you the developer to control how the rows are displayed.
– Lyuben Todorov
May 30 '12 at 22:28
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What are the differences between poll and select?
I am referring to the POSIX standard select and poll system C API calls.
3 Answers
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How to get the current branch name in Git?
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git branch
should show all the local branches of your repo. The starred branch is your current branch.
If you want to retrieve only the name of the branch you are on, you can do:
git rev-parse --abbrev-ref HEAD
or with Git 2.22 and above:
git bran...
How to get all of the immediate subdirectories in Python
...o write a simple Python script that will copy a index.tpl to index.html in all of the subdirectories (with a few exceptions).
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Why are Docker container images so large?
I made a simple image through Dockerfile from Fedora (initially 320 MB).
8 Answers
8
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Why does Ruby have both private and protected methods?
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protected methods can be called by any instance of the defining class or its subclasses.
private methods can be called only from within the calling object. You cannot access another instance's private methods directly.
Here is a quick practical exa...