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How to get active user's UserDetails
...User) ((Authentication) principal).getPrincipal();
...
}
That is ok if you need it once. But if you need it several times its ugly because it pollutes your controller with infrastructure details, that normally should be hidden by the framework.
So what you may really want is to have a contro...
Laravel Eloquent ORM Transactions
The Eloquent ORM is quite nice, though I'm wondering if there is an easy way to setup MySQL transactions using innoDB in the same fashion as PDO, or if I would have to extend the ORM to make this possible?
...
Validate that a string is a positive integer
...tive integer" to include 0, even though 0 is not positive. I include notes if you want to disallow 0.
Based on Parsing
If you want it to be a normalized decimal integer string over a reasonable range of values, you can do this:
function isNormalInteger(str) {
var n = Math.floor(Number(str));
...
How to get a table cell value using jQuery?
...
If you can, it might be worth using a class attribute on the TD containing the customer ID so you can write:
$('#mytable tr').each(function() {
var customerId = $(this).find(".customerIDCell").html();
});
Essentia...
How can “while (i == i) ;” be a non-infinite loop in a single threaded application?
...uble.NaN has the value false". This is elaborated in the Java Language Specification under "Floating-Point Types, Formats, and Values":
NaN is unordered, so the numerical
comparison operators <, <=, >, and >=
return false if either or both
operands are NaN. The
equality opera...
Is there any standard for JSON API response format?
...uring JSON responses from an API? Obviously, every application's data is different, so that much I'm not concerned with, but rather the "response boilerplate", if you will. An example of what I mean:
...
How do you add swap to an EC2 instance?
...ailable.
To add this extra space to your instance you type:
sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
sudo /sbin/mkswap /var/swap.1
sudo chmod 600 /var/swap.1
sudo /sbin/swapon /var/swap.1
If you need more than 1024 then change that to something higher.
To enable it by default a...
Download and open PDF file using Ajax
...You don't necessarily need Ajax for this. Just an <a> link is enough if you set the content-disposition to attachment in the server side code. This way the parent page will just stay open, if that was your major concern (why would you unnecessarily have chosen Ajax for this otherwise?). Beside...
Map.clear() vs new Map : Which one will be better? [duplicate]
..., but in the garbage collector thread. For 1000 records you won't see any difference.
BUT. The performance guide tells you that it is always better not to create new objects, if you can. So I would go with clear() method.
Anyway, try both variants and try to measure. Always measure!
...
Are Mutexes needed in javascript?
...e the next event will be processed.
That being said, you may need a mutex if your code does something where it expects a value not to change between when the asynchronous event was fired and when the callback was called.
For example if you have a data structure where you click one button and it se...