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Undo git reset --hard with uncommitted files in the staging area
... recover my work. I stupidly did git reset --hard , but before that I've done only get add . and didn't do git commit . Please help! Here is my log:
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How to create a multi-tenant database with shared table structures?
...aintaining 10,000 database instances, and having to create hundreds of new ones every day.
From that parameter alone, it looks like the shared-database, single-schema approach is the most suitable. The fact that you'll be storing just about 50Mb per tenant, and that there will be no per-tenant add-...
When should one use RxJava Observable and when simple Callback on Android?
...y you not only want to retrieve the userPhoto, but you have an Instagram-clone, and you want to retrieve 2 JSONs:
1. getUserDetails()
2. getUserPhotos()
You want to load these two JSONs in parallel, and when both are loaded, the page should be displayed.
The callback variant will become a bit more ...
Android basics: running code in the UI thread
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None of those are precisely the same, though they will all have the same net effect.
The difference between the first and the second is that if you happen to be on the main application thread when executing the code, the firs...
Volatile boolean vs AtomicBoolean
...ards, with a volatile boolean, you can't.
So whenever you have more than one thread modifying a field, you need to make it atomic or use explicit synchronization.
The purpose of volatile is a different one. Consider this example
volatile boolean stop = false;
void loop() {
while (!stop) { .....
How do I echo and send console output to a file in a bat script?
...e tee.bat) you can.
I try to explain the redirection a bit.
You redirect one of the ten streams with > file or < file
It is unimportant, if the redirection is before or after the command,
so these two lines are nearly the same.
dir > file.txt
> file.txt dir
The redirection in this e...
What is the naming convention in Python for variable and function names?
...ou using, that doesn't know that underscore continues a word? Lots of free ones that do. I use Notepad++, if an IDE isn't available. For that, can download a template for python editing. (Others can recommend even more useful free downloads.)
– ToolmakerSteve
D...
Reading my own Jar's Manifest
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You can do one of two things:
Call getResources() and iterate through the returned collection of URLs, reading them as manifests until you find yours:
Enumeration<URL> resources = getClass().getClassLoader()
.getResources("ME...
Get the distance between two geo points
...t exceed 4 decimal degrees.
The standard formula (Haversine) is the exact one (that is, it works for any couple of longitude/latitude on earth) but is much slower as it needs 7 trigonometric and 2 square roots. If your couple of points are not too far apart, and absolute precision is not paramount,...
How to delete last character in a string in C#?
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I can't believe this was the chosen answer... the one just below this by @BrianRasmussen is so much simpler.
– FastTrack
Mar 19 '14 at 16:09
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