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What's the best way to trim std::string?
...lt;algorithm>
#include <cctype>
#include <locale>
// trim from start (in place)
static inline void ltrim(std::string &s) {
s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](unsigned char ch) {
return !std::isspace(ch);
}));
}
// trim from end (in place)
sta...
How exactly does the callstack work?
...pile time and are therefore hardcoded into the machine code.
This graphic from Wikipedia shows what the typical call stack is structured like1:
Add the offset of a variable we want to access to the address contained in the frame pointer and we get the address of our variable. So shortly said, th...
How to move Jenkins from one PC to another
...cked on some node the URLs there are pointing to old jenkins as below: Run from slave command line: javaws old-jenkins-server:8080/computer/slaveMachine1/slave-agent.jnlp Or if the slave is headless: java -jar slave.jar -jnlpUrl old-jenkins-server:8080/computer/slaveMachine1/slave-agent.jnlp Now ...
What is a stream?
...ext time you read, you'll get the next byte, and so on.
read several bytes from the stream into an array
seek (move your current position in the stream, so that next time you read you get bytes from the new position)
write one byte
write several bytes from an array into the stream
skip bytes from th...
What is InputStream & Output Stream? Why and when do we use them?
...screen shouldn't matter. All that matters is that you receive information from the stream (or send information into that stream.)
InputStream is used for many things that you read from.
OutputStream is used for many things that you write to.
Here's some sample code. It assumes the InputStream in...
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...e output of a command I run using os.system to a variable and prevent it from being output to the screen. But, in the below code ,the output is sent to the screen and the value printed for var is 0, which I guess signifies whether the command ran successfully or not. Is there any way to assign t...
Prevent HTML5 video from being downloaded (right-click saved)?
How can I disable "Save Video As..." from a browser's right-click menu to prevent clients from downloading a video?
20 Answ...
Converting between java.time.LocalDateTime and java.util.Date
...ateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
Date out = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
Explanation:
(based on this question about LocalDate)
Despite its name, java.util.Date represents an instant on the time-line, not a "date". The actual data stored with...
Writing a compiler in its own language
...sky. As of version 2.0, the compiler was completely re-written in Scala. From that point on, the old Pizza compiler could be completely discarded, due to the fact that the new Scala compiler could be used to compile itself for future iterations.
...
Calling Java from Python
What is the best way to call java from python?
(jython and RPC are not an option for me).
9 Answers
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