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What's the most appropriate HTTP status code for an “item not found” error page
...o update it, some other thread or process ignored your lock (or you didn't set one) and deleted it. That's not good. Alternatively, if you're trying to update object id=n (where n is provided to you) without first checking it exists, you're missing a validation step in your update logic, which is al...
Uploading base64 encoded Image to Amazon S3 via Node.js
...ket: 'myBucket'} } );
inside your router method :-
ContentType should be set to the content type of the image file
buf = Buffer.from(req.body.imageBinary.replace(/^data:image\/\w+;base64,/, ""),'base64')
var data = {
Key: req.body.userId,
Body: buf,
ContentEncoding: 'base64',
...
Angular ng-if=“” with multiple arguments
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How to set selected item of Spinner by value, not by position?
...this, R.array.select_state, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mSpinner.setAdapter(adapter);
if (compareValue != null) {
int spinnerPosition = adapter.getPosition(compareValue);
mSpinner.setSelection(spinnerP...
How does PHP 'foreach' actually work?
... into a per-foreach HashPointer. After the loop body runs, the IAP will be set back to this element if it still exists. If however the element has been removed, we'll just use wherever the IAP is currently at. This scheme mostly-kinda-sort of works, but there's a lot of weird behavior you can get ou...
Reshaping data.frame from wide to long format
...cify the name of the variable-column:
library(data.table)
long <- melt(setDT(wide), id.vars = c("Code","Country"), variable.name = "year")
which gives:
> long
Code Country year value
1: AFG Afghanistan 1950 20,249
2: ALB Albania 1950 8,097
3: AFG Afghanistan 1951 21,35...
Is it possible to set the equivalent of a src attribute of an img tag in CSS?
Is it possible to set the src attribute value in CSS? At present, what I am doing is:
25 Answers
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How can I extract all values from a dictionary in Python?
...
If you only need the dictionary keys 1, 2, and 3 use: your_dict.keys().
If you only need the dictionary values -0.3246, -0.9185, and -3985 use: your_dict.values().
If you want both keys and values use: your_dict.items() whic...
Combined area of overlapping circles
... white interior) on its boundary.
This decomposes the circle union into a set of polygons (shaded blue) and circular pie pieces (shaded green) that are pairwise disjoint and cover the original union (that is, a partition). Since each piece here is something that's easy to compute the area of, you c...
Initialize a long in Java
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