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Base64: What is the worst possible increase in space usage?
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Base64 encodes each set of three bytes into four bytes. In addition the output is padded to always be a multiple of four.
This means that the size of the base-64 representation of a string of size n is:
ceil(n / 3) * 4
So, for a 16kB array, ...
Bitwise operation and usage
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One typical usage:
| is used to set a certain bit to 1
& is used to test or clear a certain bit
Set a bit (where n is the bit number, and 0 is the least significant bit):
unsigned char a |= (1 << n);
Clear a bit:
unsigned char b &= ~(1 &...
Django: Get list of model fields?
I've defined a User class which (ultimately) inherits from models.Model . I want to get a list of all the fields defined for this model. For example, phone_number = CharField(max_length=20) . Basically, I want to retrieve anything that inherits from the Field class.
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Weighted random numbers
...#include <type_traits>
#include <cassert>
int main()
{
// Set up distribution
double interval[] = {1, 2, 3, 4};
double weights[] = { .90, .56, .04};
std::piecewise_constant_distribution<> dist(std::begin(interval),
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Export database schema into SQL file
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In the picture you can see. In the set script options, choose the last option: Types of data to script you click at the right side and you choose what you want.
This is the option you should choose to export a schema and data
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Asp.NET Web API - 405 - HTTP verb used to access this page is not allowed - how to set handler mappi
I wrote REST service using ASP.NET Web API.
I'm trying to send HttpDelete request, however I get the following error:
14 An...
Path of assets in CSS files in Symfony 2
...In short:
Willing to have original CSS in an "internal" dir (Resources/assets/css/a.css)
Willing to have the images in the "public" dir (Resources/public/images/devil.png)
Willing that twig takes that CSS, recompiles it into web/css/a.css and make it point the image in /web/bundles/mynicebundle/im...
Outlook autocleaning my line breaks and screwing up my email format
...tting e-mails as html. You may still have the end-user issue of having to set the client to allow html format, but they are usually more familiar with this since so many e-mails do come html formatted. You also have a little more work on your end adding the html tags, but the end result is much mo...
How to Reverse Fragment Animations on BackStack?
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According to the android documentation for custom animation:
Change:
ft.setCustomAnimations(R.anim.slide_in, R.anim.hyperspace_out);
To:
ft.setCustomAnimations(R.anim.slide_in, R.anim.hyperspace_out, R.anim.hyperspace_in, R.anim.slide_out );
and now the backstack animates - In reverse!!
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Automatically add newline at end of curl response body
...L><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="https://www.google.co.uk/?gfe_rd=cr&amp;ei=FW">here</A>.
</BODY>...