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What is the explanation for these bizarre JavaScript behaviours mentioned in the 'Wat' talk for Code
... {} + []. This is part of the overall 'wat'-ness of Javascript.
The basic idea was simple JavaScript wanted to allow both of these forms:
if (u)
v;
if (x) {
y;
z;
}
To do so, two interpretations were made of the opening brace: 1. it is not required and 2. it can appear anywhere.
Th...
How to import multiple .csv files at once?
...would include a benchmark if you are going to say something is faster. One idea is creating 30 1GB files and reading them, that would be a case where performance matters.
– marbel
Mar 16 '18 at 3:26
...
Why is the gets function so dangerous that it should not be used?
... variables if the buffer is statically allocated. None of these is a good idea — they epitomize the phrase 'undefined behaviour`.
There is also the TR 24731-1 (Technical Report from the C Standard Committee) which provides safer alternatives to a variety of functions, including gets():
§6...
A gentle tutorial to Emacs/Swank/Paredit for Clojure
...t found out that the best option is Emacs even if I don't really liked it. IDEA, Eclipse and netbeans simply doesn't fit in the picture.
– Adam Arold
Dec 13 '11 at 22:26
...
Java's Virtual Machine and CLR
...the runtime performance of a computer program. JIT builds upon two earlier ideas in run-time environments: bytecode compilation and dynamic compilation. It converts code at runtime prior to executing it natively, for example bytecode into native machine code. The performance improvement over interpr...
Hibernate vs JPA vs JDO - pros and cons of each? [closed]
...ome notes:
JDO and JPA are both specifications, not implementations.
The idea is you can swap JPA implementations, if you restrict your code to use standard JPA only. (Ditto for JDO.)
Hibernate can be used as one such implementation of JPA.
However, Hibernate provides a native API, with features ...
Would it be beneficial to begin using instancetype instead of id?
...ve-C
With that out of the way, let's move on and explain why it's a good idea.
First, some definitions:
@interface Foo:NSObject
- (id)initWithBar:(NSInteger)bar; // initializer
+ (id)fooWithBar:(NSInteger)bar; // class factory
@end
For a class factory, you should always use instancetype. ...
What exactly is a reentrant function?
...he definition quote below it. And point is that this might not imply other ideas of safety.
– Joe Soul-bringer
May 10 '10 at 0:30
...
Django dynamic model fields
...oth worlds: dynamic fields and relational database. However, hstore is not ideal performance-wise, especially if you are going to end up storing thousands of items in one field. It also only supports strings for values.
#app/models.py
from django.contrib.postgres.fields import HStoreField
class So...
How can I exclude all “permission denied” messages from “find”?
...on could be regarded as optional at the terminal, but would be a very good idea to use it in a script so that error messages appear on standard error.
There are endless variations on this theme, depending on what you want to do. This will work on any variant of Unix with any Bourne shell derivativ...