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Why is MATLAB so fast in matrix multiplication?
...lementation of BLAS routines which were more and more efficient.
I don't know all the historical implementations (I was not born or a kid back then), but two of the most notable ones came out in the early 2000s: the Intel MKL and GotoBLAS. Your Matlab uses the Intel MKL, which is a very good, optim...
Is returning null bad design? [closed]
... getItems(); // Could potentially return null.
// Two possible code paths now so harder to test.
if (c != null) {
for (Item item : c) {
// Process item.
}
}
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What uses are there for “placement new”?
...he lifetime of the original char objects by re-using their storage. If you now call delete[] buf the dynamic type of the object(s) pointed to no longer matches their static type so you have undefined behaviour. It is more consistent to use operator new/operator delete to allocate raw memory inteded ...
How to check for file lock? [duplicate]
...very next second (read: short timespan).
Why specifically do you need to know if the file is locked anyway? Knowing that might give us some other way of giving you good advice.
If your code would look like this:
if not locked then
open and update file
Then between the two lines, another pro...
Jquery UI tooltip does not support html content
...ening yourself up for an XSS vulnerability. Only use this solution if you know what you're doing and can be certain of the HTML content in the attribute.
The easiest way to do this is to supply a function to the content option that overrides the default behavior:
$(function () {
$(document...
When to use Amazon Cloudfront or S3
...ront also supports CORS as of 2014 (thanks sergiopantoja).
* Note: S3 can now automatically replicate to additional regions as of 2015.
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jQuery pass more parameters into callback
...lue1, value2);
}
This calls the callback and supplies a single argument. Now you want to supply an additional argument, so you wrap the callback in closure.
callbackReceiver(callback); // "Hello World", undefined
callbackReceiver(function(value) {
callback(value, "Foo Bar"); // "Hello Wor...
In Objective-C why should I check if self = [super init] is not nil?
... not hell bent on not following best practices. I would, however, like to know why they are best practises in the first place. Its like being told to jump off a tower. You don't just go ahead and do it unless you know why. Is there a big, soft pillow to land on at the bottom, with a massive cash rew...
NumPy or Pandas: Keeping array type as integer while having a NaN value
...
For now you have to specify a special dtype like 'Int64' to make it work. It will be even better when it will be enabled by default.
– Jean Paul
Jan 23 '19 at 13:42
...
Issue with adding common code as git submodule: “already exists in the index”
... 'git rm -r --cached --ignore-unmatch sites/theme/AwesomeTheme' HEAD
Now you can run git submodule add git@AwesomeTheme.repowhateverurlthing sites/themes/AwesomeTheme
Since the main repository has never seen anything (a.k.a index'd) in sites/themes/AwesomeTheme before, it can now create it.
...