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Checking if an instance's class implements an interface?
...
See: http://php.net/manual/en/function.class-implements.php
Performance Tests
Some simple performance tests show the costs of each approach:
Given an instance of an object
Object construction outside the loop (100,000 iterations)
____________________________________________
| class_implement...
“The remote certificate is invalid according to the validation procedure.” using Gmail SMTP server
...d not be used in production BUT.. I'm making a prototype of something. The test server they happened to provide me with forces me to use SSL. Working with certificates is pretty new for me, so I just want a QUICK WAY OUT, which imho is fine since I WILL NOT USE IT IN PRODUCTION
...
C# List of objects, how do I get the sum of a property
...
Here is example code you could run to make such test:
var f = 10000000;
var p = new int[f];
for(int i = 0; i < f; ++i)
{
p[i] = i % 2;
}
var time = DateTime.Now;
p.Sum();
Console.WriteLine(DateTime.Now - time);
int x = 0;
time = DateTime.Now;
foreach(var item in...
How do I get the different parts of a Flask request's url?
...nother example:
request:
curl -XGET http://127.0.0.1:5000/alert/dingding/test?x=y
then:
request.method: GET
request.url: http://127.0.0.1:5000/alert/dingding/test?x=y
request.base_url: http://127.0.0.1:5000/alert/dingding/test
request.url_charset: ...
Null coalescing in powershell
...t a variable is defined first. If you set $myval = $null before doing the test, the error should go away.
– StephenD
Jul 4 '19 at 8:06
1
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Deleting lines from one file which are in another file
... 1 2 100000); do echo "$i"; done|sort --random-sort > file2
$ time ruby test.rb > ruby.test
real 0m0.639s
user 0m0.554s
sys 0m0.021s
$time sort file1 file2|uniq -u > sort.test
real 0m2.311s
user 0m1.959s
sys 0m0.040s
$ diff <(sort -n ruby.test) <(sort -n sort....
Iterating through directories with Python
...an see that each file is found:
import os
rootdir = 'C:/Users/sid/Desktop/test'
for subdir, dirs, files in os.walk(rootdir):
for file in files:
print os.path.join(subdir, file)
If you still get errors when running the above, please provide the error message.
Updated for Python3
i...
Equation for testing if a point is inside a circle
... circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle?
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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
... RETURN NULL;
END;
RETURN v_int_value;
END;
$$ LANGUAGE plpgsql;
Testing:
=# select convert_to_integer('1234');
convert_to_integer
--------------------
1234
(1 row)
=# select convert_to_integer('');
NOTICE: Invalid integer value: "". Returning NULL.
convert_to_integer...
Make a program run slowly
...ptop Per Child, and don't forget to donate it to a child once you are done testing) with a slow CPU and run your program.
Hope it helps.
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