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file_put_contents - failed to open stream: Permission denied
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There is now a troubleshooting checklist for this kind of problems : stackoverflow.com/questions/36577020/…
– Vic Seedoubleyew
Aug 20 '16 at 9:26
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Virtual Serial Port for Linux
...en another terminal and write (Terminal 2):
echo "Test" > /dev/pts/3
Now back to Terminal 1 and you'll see the string "Test".
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Measuring elapsed time with the Time module
...seconds consider the following:
import datetime
start = datetime.datetime.now()
# some code
end = datetime.datetime.now()
elapsed = end - start
print(elapsed)
# or
print(elapsed.seconds,":",elapsed.microseconds)
strftime documentation
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Mocking python function based on input arguments
...r easier, could you rename the side_effect function to something else? (i know, i know, it is pretty simple, but improves readability the fact that function name and param name are different :)
– Juan Antonio Gomez Moriano
Apr 23 '13 at 6:21
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PHP/MySQL insert row then get 'id'
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As to PHP's website, mysql_insert_id is now deprecated and we must use PDO. To do this with PDO, proceed as following:
$db = new PDO('mysql:dbname=database;host=localhost', 'user', 'pass');
$statement = $db->prepare('INSERT INTO people(name, city) VALUES(:name,...
Does C# have extension properties?
...ent it is still not supported out of the box by Roslyn compiler ...
Until now, the extension properties were not seen as valuable enough to be included in the previous versions of C# standard. C# 7 and C# 8.0 have seen this as proposal champion but it wasn't released yet, most of all because even i...
Sample random rows in dataframe
... sample_frac) have been superseded by slice_sample, though they remain for now.
– Matt_B
Sep 4 at 2:50
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ant warning: “'includeantruntime' was not set”
...">
<javac includeantruntime="false" />
</presetdef>
Now all subsequent javac tasks will essentially inherit includeantruntime="false". If your projects do actually need ant runtime libraries, you can either add them explicitly to your build files OR set includeantruntime="tru...
How do I uniquely identify computers visiting my web site?
... code snippet. This document does not show how to implement it. I want to know how do I implement this so I can track unique users for my site.
– Oliver
Jul 27 '17 at 8:16
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How to pass a function as a parameter in Java? [duplicate]
...hod(Callable<T> func) {
return func.call();
}
This pattern is known as the Command Pattern.
Keep in mind you would be best off creating an interface for your particular usage. If you chose to go with callable, then you'd replace T above with whatever type of return value you expect, suc...