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Difference between if () { } and if () : endif;
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ERROR: <?php if(TRUE){?> test <?php }?> <?php else{ ?> test2 <?php }?>
– Yousha Aleayoub
May 6 '17 at 16:01
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Node.js check if file exists
...{
console.log('Found file');
}
The API doc says how existsSync work:
Test whether or not the given path exists by checking with the file system.
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Removing multiple keys from a dictionary safely
... to use for key in set(the_dict) & entries: and bypass the key in dict test.
– DylanYoung
Apr 15 at 15:30
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Calculating Distance between two Latitude and Longitude GeoCoordinates
I'm calculating the distance between two GeoCoordinates. I'm testing my app against 3-4 other apps. When I'm calculating distance, I tend to get an average of 3.3 miles for my calculation whereas other apps are getting 3.5 miles. It's a big difference for the calculation I'm trying to perform. Are t...
How to check internet access on Android? InetAddress never times out
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Yes, very fast ;-)
Is there no reliable way to check internet, other than testing something on the internet?
Not as far as I know, but let me know, and I will edit my answer.
What if the DNS is down?
Google DNS (e.g. 8.8.8.8) is the largest public DNS in the world. As of 2013 it served 130 billio...
Installing vim with ruby support (+ruby)
...hg/ vim
cd vim
./configure --enable-rubyinterp
make
sudo make install
To test if things look fancy:
vim --version | grep ruby
Should return something like:
-python3 +quickfix +reltime -rightleft +ruby +scrollbind +signs +smartindent
Ruby should have plus now. Another trick to test it - enter...
JavaScript checking for null vs. undefined and difference between == and ===
...heck if a variable is either undefined or null and nothing else:
function test(val) {
return val == null;
}
test(null); # => true
test(undefined); # => true
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Sqlite LIMIT / OFFSET query
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I made some tests and there is no difference in performance.
That is only for compatability with other sql languages.
Running time of both versions is same.
I made sqlite db with table1 with 100000 rows. I run next test
long timeLimi...
Why compile Python code?
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Is there any difference in memory consumption? I'm testing Python on embedded devices based on mips cpu with only 64MB of RAM, so is there any advantage in memory usage when starting a compiled version of python script?
– valentt
Sep 14 ...
How can I check if my python object is a number? [duplicate]
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Test if your variable is an instance of numbers.Number:
>>> import numbers
>>> import decimal
>>> [isinstance(x, numbers.Number) for x in (0, 0.0, 0j, decimal.Decimal(0))]
[True, True, True, True]
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