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HTTP 1.0 vs 1.1
...s a new return code in HTTP/1.1 100 Continue. This is to prevent a client from sending a large request when that client is not even sure if the server can process the request, or is authorized to process the request. In this case the client sends only the headers, and the server will tell the clie...
Which is faster in Python: x**.5 or math.sqrt(x)?
..., yet
Here's some timings (Python 2.5.2, Windows):
$ python -mtimeit -s"from math import sqrt; x = 123" "x**.5"
1000000 loops, best of 3: 0.445 usec per loop
$ python -mtimeit -s"from math import sqrt; x = 123" "sqrt(x)"
1000000 loops, best of 3: 0.574 usec per loop
$ python -mtimeit -s"import ...
Run single test from a JUnit class using command-line
I am trying to find an approach that will allow me to run a single test from a JUnit class using only command-line and java.
...
What exactly is an HTTP Entity?
... # Not part of the entity.
Content-Type: text/plain # ┬ The entity is from this line down...
Content-Length: 1234 # │
# │
Hello, World! ... # ┘
And a response:
HTTP/1.1 200 OK # Not part of the entity.
Content-Length: 438 ...
What exactly do the Vagrant commands do?
...tion at vagrantup is on the shorter side.
Some information can be gleaned from command help system.
For example: gem command.
Just type the command without arguments: vagrant gem -h and it produces the information that you may need.
vagrant gem is used to install Vagrant plugins via the Ruby...
Shortest distance between a point and a line segment
...e line.
// It falls where t = [(p-v) . (w-v)] / |w-v|^2
// We clamp t from [0,1] to handle points outside the segment vw.
const float t = max(0, min(1, dot(p - v, w - v) / l2));
const vec2 projection = v + t * (w - v); // Projection falls on the segment
return distance(p, projection);
}
...
What does axis in pandas mean?
...
I think the confusion comes from the complexity of each so-called "act". df.dropna(axis=0) will first check all the COLUMNS in each ROW and then drop those ROWS with a null. The axis talks about the last step but our brain will focus on the first part....
Python: How would you save a simple settings/config file?
... reasons to use a different format.
Write a file like so:
# python 2.x
# from ConfigParser import SafeConfigParser
# config = SafeConfigParser()
# python 3.x
from configparser import ConfigParser
config = ConfigParser()
config.read('config.ini')
config.add_section('main')
config.set('main', 'key...
Position of least significant bit that is set
.../optimisation discussion attached. My favourite solution for your problem (from that site) is «multiply and lookup»:
unsigned int v; // find the number of trailing zeros in 32-bit v
int r; // result goes here
static const int MultiplyDeBruijnBitPosition[32] =
{
0, 1, 28, 2, 29, 14,...
What is an idiomatic way of representing enums in Go?
...
Quoting from the language specs:Iota
Within a constant declaration, the predeclared identifier iota represents successive untyped integer constants. It is reset to 0 whenever the reserved word const appears in the source and incr...