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What causes javac to issue the “uses unchecked or unsafe operations” warning
... Just to point out, this is not collections specific. You get the error because Java compiler can't ensure type safety in general. For example, same warning is produced with the following code: AbstractMap.SimpleEntry<String, String> entry = new AbstractMap.SimpleEntry("hello", "world...
Optimise PostgreSQL for fast testing
...ds on what else is going on with your machine, and requires some trial and error. The defaults are extremely conservative. You may need to increase the OS's maximum shared memory limit if you increase shared_buffers on PostgreSQL 9.2 and below; 9.3 and above changed how they use shared memory to avo...
How do I convert a TimeSpan to a formatted string? [duplicate]
...) first.
– MrSparkly
Oct 6 '11 at 2:05
...
How do I compute derivative using Numpy?
...
Finite differences require no external tools but are prone to numerical error and, if you're in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symbolic methods are getting quite robust these days. SymPy is an excellent project for...
Requests — how to tell if you're getting a 404
...gt;> r.status_code
404
If you want requests to raise an exception for error codes (4xx or 5xx), call r.raise_for_status():
>>> r = requests.get('http://httpbin.org/status/404')
>>> r.raise_for_status()
Traceback (most recent call last):
File "<stdin>", line 1, in <...
ReferenceError: event is not defined error in Firefox
...login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f20522887%2freferenceerror-event-is-not-defined-error-in-firefox%23new-answer', 'question_page');
}
);
Post as a guest
...
Mixed mode assembly is built against version ‘v2.0.50727′ of the runtime
... in my project continued to have the following which was causing the above error in question:
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
The solution to solve the error for this was to revert it back to the proper 2.0 reference as ...
Padding is invalid and cannot be removed?
...rent set of keys for decryption than used for encryption you will get this error:
Padding is invalid and cannot be removed
If you are using some algorithm to dynamically generate keys that will not work. They need to be the same for both encryption and decryption. One common way is to have the...
How to revert uncommitted changes including files and folders?
...
When I try this I get "error: pathspec '.' did not match any file(s) known to git.
– Mike K
May 16 '14 at 17:12
34
...
Difference between assertEquals and assertSame in phpunit?
...e both sporadically, but according to the docs:
assertSame
Reports an error identified by $message if the two variables $expected and $actual do not have the same type and value."
And as you can see in the example below the above excerpt, they are passing '2204' and 2204, which will fail usin...