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R programming: How do I get Euler's number?
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The R expression
exp(1)
represents e, and
exp(2)
represents e^2.
This works because exp is the exponentiation function with base e.
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When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
...about them lately, but I'm still unsure why I would want to implement one, and under what circumstances I would want to use one.
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git stash -> merge stashed change with current changes
I made some changes to my branch and realized I forgot I had stashed some other necessary changes to said branch. What I want is a way to merge my stashed changes with the current changes.
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How to diff a commit with its parent?
Aside from writing an alias or script, is there a shorter command for getting the diff for a particular commit?
8 Answers
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Placement of the asterisk in pointer declarations
I've recently decided that I just have to finally learn C/C++, and there is one thing I do not really understand about pointers or more precisely, their definition.
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How do I run a spring boot executable jar in a Production environment?
...ing Boot 1.3.0.M1, you are able to build fully executable jars using Maven and Gradle.
For Maven, just include the following in your pom.xml:
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<config...
Java's L number (long) specification
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There are specific suffixes for long (e.g. 39832L), float (e.g. 2.4f) and double (e.g. -7.832d).
If there is no suffix, and it is an integral type (e.g. 5623), it is assumed to be an int. If it is not an integral type (e.g. 3.14159), it is assumed to be a double.
In all other cases (byte, sho...
How do you loop in a Windows batch file?
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FOR %%A IN (list) DO command parameters
list is a list of any elements, separated by either spaces, commas or semicolons.
command can be any internal or external command, batch file or even - in OS/2 and NT - a list of commands
parameters ...
How should I escape strings in JSON?
...ary in your language that you can feed some appropriate data structure to, and let it worry about how to escape things. It'll keep you much saner. If for whatever reason you don't have a library in your language, you don't want to use one (I wouldn't suggest this¹), or you're writing a JSON library...
shell init issue when click tab, what's wrong with getcwd?
...ory was recreated in the meantime, just cd to another (existing) directory and then cd back; the simplest would be: cd; cd -.
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