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RESTful way to create multiple items in one request
...nd a POST to /api/books to create a book. But then when you want to create 100 books (in a single request as json), which URL would you post the collection of 100 books to? that's where the restlessness begins.
– code4kix
Oct 17 '18 at 13:54
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What does {0} mean when initializing an object?
...aggregate initializer also works:
SHELLEXECUTEINFO sexi = {};
char mytext[100] = {};
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Is std::vector copying the objects with a push_back?
...;Foo> FooPtr; Then make containers of FooPtrs
– pm100
Feb 16 '10 at 18:00
3
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How do I calculate percentiles with python/numpy?
...ze = len(data)
return sorted(data)[int(math.ceil((size * percentile) / 100)) - 1]
p5 = percentile(mylist, 5)
p25 = percentile(mylist, 25)
p50 = percentile(mylist, 50)
p75 = percentile(mylist, 75)
p95 = percentile(mylist, 95)
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Concatenate a vector of strings/character
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And some benchmarks:
require(microbenchmark)
test <- stri_rand_lipsum(100)
microbenchmark(stri_paste(test, collapse=''), paste(test,collapse=''), do.call(paste, c(as.list(test), sep="")))
Unit: microseconds
expr min lq mean median uq ...
jQuery - hashchange event
...ange will never fire, so its better to store hash and check it after every 100 millisecond whether its changed or not for all versions of IE.
if (("onhashchange" in window) && !($.browser.msie)) {
window.onhashchange = function () {
alert(window.location.hash);...
How to resize an image with OpenCV2.0 and Python2.6
...ze(image, (0,0), fx=0.5, fy=0.5)
and this will resize the image to have 100 cols (width) and 50 rows (height):
resized_image = cv2.resize(image, (100, 50))
Another option is to use scipy module, by using:
small = scipy.misc.imresize(image, 0.5)
There are obviously more options you can read...
How to find the array index with a value?
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You can use indexOf:
var imageList = [100,200,300,400,500];
var index = imageList.indexOf(200); // 1
You will get -1 if it cannot find a value in the array.
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java : convert float to String and String to float
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Float to string - String.valueOf()
float amount=100.00f;
String strAmount=String.valueOf(amount);
// or Float.toString(float)
String to Float - Float.parseFloat()
String strAmount="100.20";
float amount=Float.parseFloat(strAmount)
// or Float.valueOf(string)
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Scatterplot with marginal histograms in ggplot2
...h of the ggplot objects:
hist_top <- ggplot()+geom_histogram(aes(rnorm(100)))
empty <- ggplot()+geom_point(aes(1,1), colour="white")+
theme(axis.ticks=element_blank(),
panel.background=element_blank(),
axis.text.x=element_blank(), axis.text.y=element_b...