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Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference
...being assigned or passed as an argument. That is what we call a callback.
Now the question is, when is that callback called?
It depends on the case. Let's try to trace some common behavior again:
img.onload may be called sometime in the future, when (and if) the image has successfully loaded.
se...
How to convert a LocalDate to an Instant?
...for you automatically, so you must provide it.
LocalDate date = LocalDate.now();
Instant instant = date.atStartOfDay(ZoneId.systemDefault()).toInstant();
This example uses the default time-zone of the JVM - ZoneId.systemDefault() - to perform the conversion. See here for a longer answer to a rela...
How do I create test and train samples from one dataframe with pandas?
...
Btw, it does return a Pandas Dataframe now (just tested on Sklearn 0.16.1)
– Julien Marrec
Jul 8 '15 at 10:30
12
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How to inherit from a class in javascript?
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I have changed how I do this now, I try to avoid using constructor functions and their prototype property, but my old answer from 2010 is still at the bottom. I now prefer Object.create(). Object.create is available in all modern browsers.
I should not...
Use CSS3 transitions with gradient backgrounds
...radient transitions with un-prefixed new syntax [e.g. radial-gradient(...)]now confirmed to work (again?) on Microsoft Edge 17.17134. I don't know when this was added. Still not working on latest Firefox & Chrome / Windows 10.
...
Unicode equivalents for \w and \b in Java regular expressions?
...t also sports corrected definitions for various other properties, too. It now tracks The Unicode Standard, in both RL1.2 and RL1.2a from UTS#18: Unicode Regular Expressions. This is an exciting and dramatic improvement, and the development team is to be commended for this important effort.
Java...
How to create an installer for a .net Windows Service using Visual Studio
...operties as you need such as service name and user that it should run as.
Now you need to make a setup project. The best thing to do is use the setup wizard.
Right click on your solution and add a new project: Add > New Project > Setup and Deployment Projects > Setup Wizard
a. This could ...
Rails extending ActiveRecord::Base
...y-patching.
Some people, when confronted with a problem, think “I know, I'll use
monkey patching.” Now they have two problems.
Monkey patching is easy and quick. But, the time and effort saved is always extracted back
sometime in the future; with compound interest. These days I limi...
Assign one struct to another in C
...truct S {
char * p;
};
struct S s1, s2;
s1.p = malloc(100);
s2 = s1;
Now the pointers of both structs point to the same block of memory - the compiler does not copy the pointed to data. It is now difficult to know which struct instance owns the data. This is why C++ invented the concept of use...
How do I get my Maven Integration tests to run
...
The Maven build lifecycle now includes the "integration-test" phase for running integration tests, which are run separately from the unit tests run during the "test" phase. It runs after "package", so if you run "mvn verify", "mvn install", or "mvn de...