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Immutability of Strings in Java
... this code, for example:
String s1 = "Hello";
String s2 = s1;
// s1 and s2 now point at the same string - "Hello"
Now, there is nothing1 we could do to s1 that would affect the value of s2. They refer to the same object - the string "Hello" - but that object is immutable and thus cannot be altered....
How connect Postgres to localhost server using pgAdmin on Ubuntu?
...-u postgres psql postgres
alter user postgres with password 'postgres';
Now connect to pgadmin using username postgres and password postgres
Now you can create roles & databases using pgAdmin
How to change PostgreSQL user password?
...
Retrieve specific commit from a remote Git repository
...ged by Junio C Hamano -- gitster -- in commit a9d3493, 01 Jun 2015)
You now have a new config (on the server side)
uploadpack.allowReachableSHA1InWant
Allow upload-pack to accept a fetch request that asks for an object that is reachable from any ref tip. However, note that calculating objec...
How to theme the ENTIRE Xcode IDE to light-on-dark?
...preferences ⌘., then go to Fonts & Colors, then select the Console. Now you can edit its background:
Just be sure to edit the font colors of the various input and outputs texts if you choose black. By default all of the input/output fonts are black, only the console prompt is not.
...
Why doesn't nodelist have forEach?
...nner text, but found that nodelist does not have a forEach method. I know that nodelist doesn't inherit from Array , but doesn't it seem like forEach would be a useful method to have? Is there a particular implementation issue I am not aware of that prevents adding forEach to nodelist ?...
How to scale down a range of numbers with a known min and max value
...n
which is what we want. So we need to do a translation and a scaling. Now if instead we want to get arbitrary values of a and b, we need something a little more complicated:
(b-a)(x - min)
f(x) = -------------- + a
max - min
You can verify that putting in min for x now give...
Simpler way to put PDB breakpoints in Python code?
... whatever other languages you use.
2019 Update (Python 3.7+)
Python 3.7+ now has the builtin breakpoint() which can replace the previous import pdb; pdb.set_trace() in vim. It still works the same.
share
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What is more efficient? Using pow to square or just multiply it with itself?
...t/date_time/posix_time/posix_time.hpp>
inline boost::posix_time::ptime now()
{
return boost::posix_time::microsec_clock::local_time();
}
#define TEST(num, expression) \
double test##num(double b, long loops) \
{ \
double x = 0.0; \
\
boost::posix_time::ptime startTime = now(); \
...
How to avoid reverse engineering of an APK file?
...t the source code in my APK file?
As everyone says, and as you probably know, there's no 100% security. But the place to start for Android, that Google has built in, is ProGuard. If you have the option of including shared libraries, you can include the needed code in C++ to verify file sizes, inte...
Generating random whole numbers in JavaScript in a specific range?
... have an interval like this:
[0 .................................... 1)
Now, we'd like a number between min (inclusive) and max (exclusive):
[0 .................................... 1)
[min .................................. max)
We can use the Math.random to get the correspondent in the [min, ...