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Javascript: formatting a rounded number to N decimals
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@deepeshk But what would be the problem with using toFixed() to pad decimals at the end, after rounding?
– pauloya
Dec 15 '11 at 17:11
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UICollectionView auto scroll to cell at IndexPath
...me collection layouts cause subview layout every time you scroll.
Here's what I found works reliably:
Objective C :
- (void)viewDidLayoutSubviews {
[super viewDidLayoutSubviews];
// If we haven't done the initial scroll, do it once.
if (!self.initialScrollDone) {
self.initia...
How to check if a variable is not null?
... is that you should check for null like:
if(myvar) { }
It also mentions what's considered 'falsey' that you might not realise.
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How to plot two histograms together in R?
...ur two data frames into one long one.
So, let's start with something like what you have, two separate sets of data and combine them.
carrots <- data.frame(length = rnorm(100000, 6, 2))
cukes <- data.frame(length = rnorm(50000, 7, 2.5))
# Now, combine your two dataframes into one.
# First ...
Image Segmentation using Mean Shift explained
...tual numbers, we will display a color coding, so it's easier to understand what is happening:
The color coding for your matrix is:
Then we take a reasonable Mean Shift:
MeanShiftFilter[a, 3, 3]
And we get:
Where all center elements are equal (to 97, BTW).
You may iterate several...
Is there a Mutex in Java?
.../index-140767.html
It has a slightly different pattern which is (I think) what you are looking for:
try {
mutex.acquire();
try {
// do something
} finally {
mutex.release();
}
} catch(InterruptedException ie) {
// ...
}
In this usage, you're only calling release() after a succe...
Can I redirect the stdout in python into some sort of string buffer?
...() # or perhaps io.StringIO()
try:
sys.stdout = fake_stdout
# do what you have to do to create some output
finally:
sys.stdout = real_stdout
output_string = fake_stdout.getvalue()
fake_stdout.close()
# do what you want with the output_string
Tested in Python 2.7.10 using ...
How to document a string type in jsdoc with limited possible values
...ameter. This parameter can have only one of a few defined possible values. What is the best way to document the same? Should shapeType be defined as enum or TypeDef or something else?
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How to get first element in a list of tuples?
...you mean something like this?
new_list = [ seq[0] for seq in yourlist ]
What you actually have is a list of tuple objects, not a list of sets (as your original question implied). If it is actually a list of sets, then there is no first element because sets have no order.
Here I've created a fla...
Unicode equivalents for \w and \b in Java regular expressions?
...gt;\PM\pM*)
Some things to consider...
That uses for its \X definition what Unicode now refers to as a legacy grapheme cluster, not an extended grapheme cluster, as the latter is rather more complicated. Perl itself now uses the fancier version, but the old version is still perfectly workable fo...