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jQuery .hasClass() vs .is()
...ed method of determining whether an element is assigned a class, from a performance standpoint?
4 Answers
...
Conda: Installing / upgrading directly from github
...
There's better support for this now through conda-env. You can, for example, now do:
name: sample_env
channels:
dependencies:
- requests
- bokeh>=0.10.0
- pip:
- "--editable=git+https://github.com/pythonforfacebook/facebook-sdk.g...
Iterate over the lines of a string
...=foo): return iter(foo.splitlines())
def f2(foo=foo):
retval = ''
for char in foo:
retval += char if not char == '\n' else ''
if char == '\n':
yield retval
retval = ''
if retval:
yield retval
def f3(foo=foo):
prevnl = -1
while Tru...
How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
... merely meant that it is always easy to find the name of the proper header for a standard function. I.e. it is not really critical to mention the exact header name in the answer.
– AnT
Jul 3 '10 at 1:51
...
How do I strip non alphanumeric characters from a string and keep spaces?
...n-alphanumber characters but keeps spaces. This is to clean search input before it hits the db. Here's what I have so far:
...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
... to run another query. The exception gets thrown on the second, correctly formed query because you are using a broken transaction to do additional work. PostgreSQL by default stops you from doing this.
I'm using: PostgreSQL 9.1.6 on x86_64-redhat-linux-gnu, compiled by gcc (GCC) 4.7.2 20120921 (Re...
Example for sync.WaitGroup correct?
...
Yes, this example is correct. It is important that the wg.Add() happens before the go statement to prevent race conditions. The following would also be correct:
func main() {
var wg sync.WaitGroup
wg.Add(1)
go dosomething(200, &wg)
wg.Add(1)
go dosomething(400, &wg)
...
Function that creates a timestamp in c#
...
The token for year should be lowercase here: return value.ToString("yyyyMMddHHmmssffff");
– Don Cote
Nov 2 '09 at 21:18
...
Numpy: Divide each row by a vector element
... and broadcasting, as in
(data.T - vector).T
and
(data.T / vector).T
For higher dimensional arrays you may want to use the swapaxes method of NumPy arrays or the NumPy rollaxis function.
There really are a lot of ways to do this.
For a fuller explanation of broadcasting, see
http://docs.scipy...
How do you get the magnitude of a vector in Numpy?
...rray([1,2,3,4,5])
np.linalg.norm(x)
You can also feed in an optional ord for the nth order norm you want. Say you wanted the 1-norm:
np.linalg.norm(x,ord=1)
And so on.
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