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What is the effect of encoding an image in base64?
...is 2^6. So base64 stores 6bit per 8bit character. So the proportion is 6/8 from unconverted data to base64 data. This is no exact calculation, but a rough estimate.
Example:
An 48kb image needs around 64kb as base64 converted image.
Calculation: (48 / 6) * 8 = 64
Simple CLI calculator on Linux s...
How do I change the formatting of numbers on an axis with ggplot?
...I'm posting it here in the hope it might be useful to some. I got the code from here so I claim no credit for it, that rightly goes to Brian Diggs.
fancy_scientific <- function(l) {
# turn in to character string in scientific notation
l <- format(l, scientific = TRUE)
# quote t...
“You are on a branch yet to be born” when adding git submodule
...
Also odd: after the fatal warning from my OP, git leaves an empty dir at .vim/bundle/vim-scala. I also noticed that even though .gitmodules is untouched, it added some lines referring to this github.com repo to .git/config, but after removing those I still ge...
What's best SQL datatype for storing JSON string?
...rchar) will be introduced, as well as a FOR JSON command to convert output from a query into JSON format
Update #2: in the final product, Microsoft did not include a separate JSON datatype - instead, there are a number of JSON-functions (to package up database rows into JSON, or to parse JSON into ...
ios Upload Image and Text using HTTP POST
...
Here's code from my app to post an image to our web server:
// Dictionary that holds post parameters. You can set your post parameters that your server accepts or programmed to accept.
NSMutableDictionary* _params = [[NSMutableDictionar...
Error handling in C code
...
There's a nice set of slides from CMU's CERT with recommendations for when to use each of the common C (and C++) error handling techniques. One of the best slides is this decision tree:
I would personally change two things about this flowcart.
First,...
Why does Math.round(0.49999999999999994) return 1?
...t. 1.4999999999999998 is the smallest double less than 1.5. As you can see from the question, the floor method rounds it correctly.
– OrangeDog
Mar 29 '12 at 11:12
...
Time complexity of Sieve of Eratosthenes algorithm
From Wikipedia:
4 Answers
4
...
Difference between shadowing and overriding in C#?
...en by a sub-class and calls to that method even on the super-class type or from inside code of the super-class will call the replacement implementation from the sub-class.
Then a concrete method is shown (one not marked as virtual or abstract) being hidden by using the new keyword when defining a m...
Using Sinatra for larger projects via multiple files
...o get some ideas for how others are laying out their Sinatra applications. From that you can probably find one that suits your needs or simply make your own. It's not too hard to do. As you develop more Sinatra apps, you can add to your boilerplate.
Here's what I made and use for all of my projects...