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C++ unordered_map using a custom class type as the key
...p; third == other.third);
}
};
Here is a simple hash function (adapted from the one used in the cppreference example for user-defined hash functions):
namespace std {
template <>
struct hash<Key>
{
std::size_t operator()(const Key& k) const
{
using std::size...
JavaScript displaying a float to 2 decimal places
...d simple method I follow and it has never let me down:
var num = response_from_a_function_or_something();
var fixedNum = parseFloat(num).toFixed( 2 );
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Convert SVG image to PNG with PHP
... ie8 or lower without requiring the user to install an svg viewer plugin - from SVG Wikipedia page: "All major modern web browsers, support and render SVG markup directly with the very notable exception of Microsoft Internet Explorer (IE)[3] The Internet Explorer 9 beta supports the basic SVG featur...
Any reason to prefer getClass() over instanceof when generating .equals()?
...in most of them. She also gets into the instanceof vs getClass. Some quote from it
Conclusions
Having dissected the four arbitrarily chosen examples of implementations of equals() , what do we conclude?
First of all: there are two substantially different ways of performing the check for type match ...
How can I open multiple files using “with open” in Python?
... of files all at the same time, you can use contextlib.ExitStack, starting from Python version 3.3:
with ExitStack() as stack:
files = [stack.enter_context(open(fname)) for fname in filenames]
# Do something with "files"
Most of the time you have a variable set of files, you likely want t...
What is the difference between a Docker image and a container?
...
From my article on Automating Docker Deployments:
Docker Images vs. Containers
In Dockerland, there are images and there are containers. The two are closely related, but distinct. For me, grasping this dichotomy has clarifi...
iPhone Keyboard Covers UITextField
...View beginAnimations: @"anim" context: nil];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDuration: movementDuration];
self.view.frame = CGRectOffset(self.view.frame, 0, movement);
[UIView commitAnimations];
}
...
~x + ~y == ~(x + y) is always false?
...sides are not equal, since they have at least that one bit that is flipped from each other.
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Waiting until two async blocks are executed before starting another block
...ule them on the same serial queue, they'll run serially. It's no different from scheduling the blocks without groups.
– Jörn Eyrich
Aug 11 '12 at 14:12
1
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Linux: compute a single hash for a given folder & contents?
...ns "bar was here". With your method, we would not be able to separate that from two files C and D, where C contains "foobar" and D contains " was here". By hashing each file individually and then hash all "filename hash" pairs, we can see the difference.
– Vatine
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