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What can I use instead of the arrow operator, `->`?
...
@TimSeguine If you ever want to see pretty code, then look at the documentation for inside the Macintosh. I think they invented CamelCase. Very descriptive variable names and elegantly formatted code. They managed to make their later C...
Android OpenGL ES and 2D
...e it as an initializer parameter
{
/*many thanks to sprite method test if this works*/
if ( gl == null )
{
Log.e(TAG, "Failed to load resource. Context/GL is NULL");
return false;
}
int error;
int textureName = -1;
gl.glGenTextures(1, texture, 0);
te...
Start an Activity with a parameter
...y:
Bundle b = getIntent().getExtras();
int value = -1; // or other values
if(b != null)
value = b.getInt("key");
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docker error: /var/run/docker.sock: no such file or directory
... daemon, please set:
export DOCKER_CERT_PATH=
export DOCKER_TLS_VERIFY=1
export DOCKER_HOST=tcp://:2376
After setting these environment variables I was able to run the build without the problem.
Update [2016-04-28] If you are using a the recent versions of docker you can do
eval $(d...
Remove NA values from a vector
...st what you're asking for:
d <- c(1, 100, NA, 10)
max(d, na.rm=TRUE)
If you do want to remove all of the NAs, use this idiom instead:
d <- d[!is.na(d)]
A final note: Other functions (e.g. table(), lm(), and sort()) have NA-related arguments that use different names (and offer different o...
Why is the .bss segment required?
...derstand is why do we have dedicated segment for uninitialized variables? If an uninitialised variable has a value assigned at run time, does the variable exist still in the .bss segment only?
...
What is a dependency property?
...is a dependency property in .Net (especially in WPF context). What is the difference from the regular property?
3 Answers
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Select rows which are not present in other table
...nated unless EXCEPT ALL is used.
Typically, you'll want the ALL keyword. If you don't care, still use it because it makes the query faster.
NOT IN
Only good without NULL values or if you know to handle NULL properly. I would not use it for this purpose. Also, performance can deteriorate with big...
Javascript add leading zeroes to date
... and just ask for the last two since those are always the two we want.
So if the MyDate.getMonth() returns 9, it will be:
("0" + "9") // Giving us "09"
so adding .slice(-2) on that gives us the last two characters which is:
("0" + "9").slice(-2)
"09"
But if MyDate.getMonth() returns 10, it wi...
Can I make a pull request on a gist on GitHub?
...ges in the fork, then share a link to your fork with the original author.
If the original author is keeping a local cloned repository of their gist (see How do you manage your gists on github?) then they can do a pull against your fork as a remote using the gist # (e.g. git://gist.github.com/113127...