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Fast check for NaN in NumPy
I'm looking for the fastest way to check for the occurrence of NaN ( np.nan ) in a NumPy array X . np.isnan(X) is out of the question, since it builds a boolean array of shape X.shape , which is potentially gigantic.
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How can I remove duplicate rows?
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@Martin, @Georg: So, I've made a small test. A big table was created and populated as described here: sqlinthewild.co.za/index.php/2010/03/23/… Two SELECTs then were produced, one using the LEFT JOIN + WHERE IS NULL technique, the other using the NOT IN one. The...
In git, is there a simple way of introducing an unrelated branch to a repository?
... @phord I more or less thought of the orphan to contain things like unit tests or documentation separated from the source code of the project.
– JJD
Sep 30 '11 at 10:19
2
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Correct owner/group/permissions for Apache 2 site files/folders under Mac OS X?
...s point strongly recommend the alternate solution of creating local VMs to test your apps on instead of using OS X itself. See: vagrantup.com
– dkamins
Nov 7 '14 at 22:14
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Java Date vs Calendar
...y side effects and it is done for you by the compiler, rather than a JUnit test. You use this technique by creating private final fields in your class.
And coming back to the StringBuffer analogy. Here is some code that shows you how to convert between Calendar and Date
String s = "someString"; ...
How to remove specific elements in a numpy array
...nge(len(a))])))
>>> a
array([1, 2, 5, 6, 8, 9])
According to my tests, this outperforms numpy.delete(). I don't know why that would be the case, maybe due to the small size of the initial array?
python -m timeit -s "import numpy as np" -s "import itertools" -s "a = np.array([1,2,3,4,5,6,...
Resolving a Git conflict with binary files
...used the local version) like this
git commit -a -m "Fix merge conflict in test.foo"
Git normally autocommits after merging, but when it detects conflicts it cannot solve by itself, it applies all patches it figured out and leaves the rest for you to resolve and commit manually. The Git Merge Man ...
Base64 length calculation?
...edBase64(int n) {
int bits = 8 * n;
return ceilDiv(bits, 6);
}
// test only
public static void main(String[] args) {
for (int n = 0; n < 21; n++) {
System.out.println("Base 64 padded: " + paddedBase64(n));
System.out.println("Base 64 unpadded: " + unpaddedBase64(n));
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Xcode 6 beta 2 issue exporting .ipa: “Your account already has a valid iOS distribution certificate”
... longer use one Apple Developer account on multiple Macs for Archiving TF (TestFlight) builds. Seems like every single developer should pay $99/yr individually! Apple's TestFlight sounds promising but beta builds will be reviewed by App Review Team. :(
– Adnan
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Correct way to write loops for promise.
...888: Maybe the terminology is a bit odd, but I mean that a while loop does test some global state while a for loop has its iteration variable (counter) bound to the loop body itself. In fact I've used a more functional approach that looks more like a fixpoint iteration than a loop. Check their code ...