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Mimicking sets in JavaScript?
...the list if it wasn't already there
obj[A] = true;
For completeness, the test for whether A is in the list is a little safer with this:
if (Object.prototype.hasOwnProperty.call(obj, A))
// put code here
}
because of potential conflict between built-in methods and/or properties on the base Obj...
memory_get_peak_usage() with “real usage”
...
Ok, lets test this using a simple script:
ini_set('memory_limit', '1M');
$x = '';
while(true) {
echo "not real: ".(memory_get_peak_usage(false)/1024/1024)." MiB\n";
echo "real: ".(memory_get_peak_usage(true)/1024/1024)." MiB\n\n"...
How to avoid null checking in Java?
... means that you can validate code with the assertions while developing and testing, and disable them in a production environment, although my testing has shown next to no performance impact from assertions.
Not using assertions in this case is OK because the code will just fail, which is what will ...
How to check whether a pandas DataFrame is empty?
...
To see if a dataframe is empty, I argue that one should test for the length of a dataframe's columns index:
if len(df.columns) == 0: 1
Reason:
According to the Pandas Reference API, there is a distinction between:
an empty dataframe with 0 rows and 0 columns
an empty dataframe w...
How to write a large buffer into a binary file in C++, fast?
...out my SSD. I didn't expect this to see, because option2 used to be the fastest code on my old machine back then.
TL;DR: My measurements indicate to use std::fstream over FILE.
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Is JavaScript guaranteed to be single-threaded?
...d it since (I certainly hope so).
probably more. It's been a while since I tested this and browsers have gained complexity since.
In summary, JavaScript appears to most users, most of the time, to have a strict event-driven single thread of execution. In reality, it has no such thing. It is not cl...
Why does the JVM still not support tail-call optimization?
...T. Depending on the JVM, the JIT may or may not do this.
Then it gives a test you can use to figure out if your JIT does this.
Naturally, since this is an IBM paper, it includes a plug:
I ran this program with a couple of
the Java SDKs, and the results were
surprising. Running on Sun's Ho...
If REST applications are supposed to be stateless, how do you manage sessions?
... to Google for authentication and simple HTTP Authentication for automated testing. I also used HTTP Header authentication via JASPIC for local testing as well (though the same approach can be performed in SiteMinder)
As per those examples, the authentication is managed on the client side (though ...
How do I include inline JavaScript in Haml?
...:javascript
$(document).ready( function() {
$('body').addClass( 'test' );
} );
Docs: http://haml.info/docs/yardoc/file.REFERENCE.html#javascript-filter
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What's the difference between window.location= and window.location.replace()?
...
what is the value of mystring? does anyone really know without doing some test. No one knows what exactly will happen here. Hell I just wrote this and I don't even know what it does. location is an object but I am assigning a string will it pass the string or pass the location object. Lets say ther...