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How to convert a string to lower case in Bash?
...${word:$i:1}"
lc "$ch"
done
Note: YMMV on this one. Doesn't work for me (GNU bash version 4.2.46 and 4.0.33 (and same behaviour 2.05b.0 but nocasematch is not implemented)) even with using shopt -u nocasematch;. Unsetting that nocasematch causes [[ "fooBaR" == "FOObar" ]] to match OK BUT insid...
When to use an interface instead of an abstract class and vice versa?
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This was ery helpful: Interfaces do not express something like "a Doberman is a type of dog and every dog can walk" but more like "this thing can walk". Thank you
– aexl
Nov 9 '14 at 11:07
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SqlException from Entity Framework - New transaction is not allowed because there are other threads
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Yeah, this caused me a headache too. I almost fell off my chair when I found the problem! I understand the technical reasons behind the problem, but this isn't intuitive and it isn't helping the developer to fall into the "pit of success" blog...
How to assign text size in sp value using java code
...y. It's easily done as follows: SCREEN_DENSITY = getResources().getDisplayMetrics().density; yourView.setTextSize(TypedValue.COMPLEX_UNIT_SP, (desiredTextHeightInSP / SCREEN_DENSITY);
– PeteH
Sep 13 '14 at 23:50
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Cluster analysis in R: determine the optimal number of clusters
...n R, I'm not very sure how to choose the best number of clusters to do a k-means analysis. After plotting a subset of below data, how many clusters will be appropriate? How can I perform cluster dendro analysis?
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how to use sed, awk, or gawk to print only what is matched?
... 's/^.*abc\([0-9]*\)xyz.*$/\1/p' example.txt
For matching at least one numeric character without +, I would use:
sed -n 's/^.*abc\([0-9][0-9]*\)xyz.*$/\1/p' example.txt
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Jump into interface implementation in Eclipse IDE
You know how in Eclipse, pressing F3 over a method will take you to its declaration? Well I have a method that is part of an interface; clicking F3 over this naturally takes me to the declaring interface.
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How to differentiate single click event and double click event?
...button in li with id "my_id" . I attached two jQuery events with this element
18 Answers
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Copying PostgreSQL database to another server
I'm looking to copy a production PostgreSQL database to a development server. What's the quickest, easiest way to go about doing this?
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Use grep to report back only line numbers
... edited Jan 1 '19 at 12:27
Ömer An
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answered Aug 5 '11 at 15:43
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