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Read file from line 2 or skip header row
How can I skip the header row and start reading a file from line2?
8 Answers
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SQL order string as number
...s' | 123
'$123' | 0 /* the left side of the string does not start with a number */
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serve current directory from command line
...rt => 9090, :DocumentRoot => Dir.pwd); trap('INT') { s.shutdown }; s.start"
Even the first command is hard to remember, so I just have this in my .bashrc:
function serve {
port="${1:-3000}"
ruby -run -e httpd . -p $port
}
It serves the current directory on port 3000 by default, but ...
Where should I put the log4j.properties file?
...ct
src
MyClass.java
log4j.properties
If you start executing from a different project, you need to have that file in the project used for starting the execution. For example, if a different project holds some JUnit tests, it needs to have also its log4j.properties file....
Vim: Replacing a line with another one yanked before
...
Move to the start of the first line.
y, $ – copy the line without the linebreak at the end
Move to the start of the target line.
V, p – replace just one target line
c, c, Ctrlr, 0, Esc
Date vs DateTime
...d timezone nightmares if your server's timezone configs ever change... and starts writing data in ways you didn't anticipate. Datetime can save you there, date can't at all, and will become mindbendingly hard to fix if you ever start writing date down with the wrong timezone context.
...
C++ equivalent of java's instanceof
...Duration>
Duration instanceOfMeasurement(unsigned _loopCycles) {
auto start = std::chrono::high_resolution_clock::now();
volatile bool isInstanceOf = false;
for (unsigned i = 0; i < _loopCycles; ++i) {
Base *ptr = new Derived;
isInstanceOf = ptr->template instanceOf<Derived...
How can I use numpy.correlate to do autocorrelation?
...lation result array would be the greatest. However, the correlation is not starting at a time difference of 0. It starts at a negative time difference, closes to 0, and then goes positive. That is, you were expecting:
autocorrelation(a) = ∑ -∞ < i < ∞ aivt+i where 0 <= t < ∞ ...
Wrapping synchronous code into asynchronous call
...u need to do? Are there any front-end changes you can make instead - e.g., start the request and allow the user to do other work while it's processing?
I'll proceed with the assumption that yes, you really do need to make the individual request execute faster.
In this case, you'll need to execute ...
How to vertically center a container in Bootstrap?
...t;a href="pricing-and-signup.html" class="btn-primary btn h2 lightBlue get-Started-btn">GET STARTED</a>
<h6 class="get-Started-sub-btn">FREE VERSION AVAILABLE!</h6>
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