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How to change value of process.env.PORT in node.js?
...
For just one run (from the unix shell prompt):
$ PORT=1234 node app.js
More permanently:
$ export PORT=1234
$ node app.js
In Windows:
set PORT=1234
In Windows PowerShell:
$env:PORT = 1234
...
How can I truncate a datetime in SQL Server?
...floor them to remove the fraction, and the time portion of the values are gone when you cast them back to datetime. It's all just bit shifting with no complicated logic and it's very fast.
Be aware this relies on an implementation detail Microsoft is free to change at any time, even in an automati...
What's the _ underscore representative of in Swift References?
...be as clear as it's possible - so the first parameter's underscore is mentioned for EVERY method. That would explain everything)
– Dmitry Gryazin
Sep 24 '15 at 13:19
4
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Is it bad practice to use Reflection in Unit testing? [duplicate]
...y.
Update: as @tackline noted, this concerns only using Reflection within one's own test code, not the internals of the testing framework. JUnit (and probably all other similar frameworks) uses reflection to identify and call your test methods - this is a justified and localized use of reflection. ...
How to do a batch insert in MySQL
... the best way to do this in a query? Should I just make a loop and insert one record per iteration? Or is there a better way?
...
How to take screenshot of a div with JavaScript?
...ass image into php script, which adds appropriate headers
Example "all-in-one" script script.php
<?php if(isset($_GET['image'])):
$image = $_GET['image'];
if(preg_match('#^data:image/(.*);base64,(.*)$#s', $image, $match)){
$base64 = $match[2];
$imageBody = base64_decode...
getExtractedText on inactive InputConnection warning on android
...es the stream of IInputConnectionWrapper warnings. However this is still prone to problems when the user rapidly alternates between typing something and pressing the button or presses the button when the app is under sufficient load, etc.
Fortunately, I found another way to clear text: Editable.cle...
How to check for file lock? [duplicate]
...
Yes, but the standalone check for whether a file is locked is useless, the only correct way to do this is to try to open the file for the purpose you need the file, and then handle the lock problem at that point. And then, as you say, wait, or d...
how do I insert a column at a specific column index in pandas?
... n l v
0 0 a 1
1 0 b 2
2 0 c 1
3 0 d 2
EDIT: this can be done in one line ; however, this looks a bit ugly. Maybe some cleaner proposal may come...
>>> df.reindex(columns=['n']+df.columns[:-1].tolist())
n l v
0 0 a 1
1 0 b 2
2 0 c 1
3 0 d 2
...
function declaration isn't a prototype
...efinition, your program has undefined behavior.
For a function that takes one or more arguments, you can specify the type of each argument in the declaration:
int bar(int x, double y);
Functions with no arguments are a special case. Logically, empty parentheses would have been a good way to spec...