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Command substitution: backticks or dollar sign / paren enclosed? [duplicate]
What's the preferred way to do command substitution in bash?
3 Answers
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How to trigger a phone call when clicking a link in a web page on mobile phone
I need to build a web page for mobile devices. There's only one thing I still haven't figured out: how can I trigger a phone call through the click of text?
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Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification
...an add this certificate to the list of trusted certificates of your JVM.
In this article author describes how to fetch the certificate from your browser and add it to cacerts file of your JVM. You can either edit JAVA_HOME/jre/lib/security/cacerts file or run you application with -Djavax.net.ssl.t...
How to combine date from one field with time from another field - MS SQL Server
In an extract I am dealing with, I have 2 datetime columns. One column stores the dates and another the times as shown.
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Java, List only subdirectories from a directory, not files
In Java, How do I list only subdirectories from a directory?
13 Answers
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How expensive is the lock statement?
I've been experimenting with multi threading and parallel processing and I needed a counter to do some basic counting and statistic analysis of the speed of the processing. To avoid problems with concurrent use of my class I've used a lock statement on a private variable in my class:
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How do I print the type of a variable in Rust?
I have the following:
11 Answers
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Check whether a string is not null and not empty
How can I check whether a string is not null and not empty?
31 Answers
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Why does the C preprocessor interpret the word “linux” as the constant “1”?
Why does the C preprocessor in GCC interpret the word linux (small letters) as the constant 1 ?
5 Answers
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What is the difference between join and merge in Pandas?
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I always use join on indices:
import pandas as pd
left = pd.DataFrame({'key': ['foo', 'bar'], 'val': [1, 2]}).set_index('key')
right = pd.DataFrame({'key': ['foo', 'bar'], 'val': [4, 5]}).set_index('key')
left.join(right, lsuffix='_l', rsu...