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Why do we check up to the square root of a prime number to determine if it is prime?
...es this might be useful, but this all heavily depends on implementation details (programming language, hardware, data types, libraries), none of which are known in this general consideration.
– Sven Marnach
Aug 3 at 9:38
...
iPhone App Icons - Exact Radius?
...for the 114x114 icon = 18 (iPhone/iPod Touch Retina)
corner radius for the 72x72 icon = 11 (iPad)
corner radius for the 144x144 icon = 23 (iPad Retina)
If you do create a set of custom icons, you can set the UIPrerenderedIcon option to true in your info.plist file and it will not add the gloss eff...
How do I delete a Git branch locally and remotely?
...added in Git v1.5.0 "to delete a remote branch or a tag."
Starting on Git v2.8.0 you can also use git push with the -d option as an alias for --delete.
Therefore, the version of Git you have installed will dictate whether you need to use the easier or harder syntax.
Delete Remote Branch [Original...
How do I hide javascript code in a webpage?
...
jfriend00jfriend00
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What is copy-on-write?
...f):
return ValueProxy(self.subject)
v1 = ValueProxy(Value('foo'))
v2 = v1.clone() # shares the immutable Value object between the copies
assert v1.subject is v2.subject
v2.write('bar') # creates a new immutable Value object with the new state
assert v1.subject is not v2.subject
...
How to make Twitter Bootstrap menu dropdown on hover rather than click
...
I created a pure on hover dropdown menu based on the latest (v2.0.2) Bootstrap framework that has support for multiple submenus and thought I'd post it for future users:
body {
padding-top: 60px;
padding-bottom: 40px;
}
.sidebar-nav {
padding: 9px 0;
}
.dropdown-m...
Suppress Scientific Notation in Numpy When Creating Array From Nested List
...rge numbers:
print(a) #prints [0.000010 22.000000 1234567799999999979944197226496.000000]
We've force-suppressed the exponential notation, but it is not rounded or justified, so specify extra formatting options:
np.set_printoptions(suppress=True,
formatter={'float_kind':'{:0.2f}'.format}) #...
java: (String[])List.toArray() gives ClassCastException
... it can't determine what type of array to create.
use
toArray(new String[v2.size()]);
which allocates the right kind of array (String[] and of the right size)
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...
Difference between String#equals and String#contentEquals methods
...nstanceof AbstractStringBuilder) {
char v1[] = value;
char v2[] = ((AbstractStringBuilder) cs).getValue();
int i = 0;
int n = value.length;
while (n-- != 0) {
if (v1[i] != v2[i])
return false;
i++;
}
retu...
.gitignore exclude folder but include specific subfolder
...ọc Duy (pclouds) is trying to add this feature:
commit 506d8f1 for git v2.7.0, reverted in commit 76b620d git v2.8.0-rc0
commit 5e57f9c git v2.8.0-rc0,... reverted(!) in commit 5cee3493 git 2.8.0.
So with git 2.9+, this could have actually worked, but was ultimately reverted:
application/
!ap...