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How many constructor arguments is too many?
...The ideal number of arguments for a function is zero (niladic). Next comes one (monadic) followed closely by two (dyadic). Three arguments (triadic) should be avoided where possible. More than three (polyadic) requires very special justification—and then shouldn't be used anyway.
He says this be...
Fastest way(s) to move the cursor on a terminal command line?
...uick substitution: ^--option25^--newoption
Character search. This was mentioned by Pax, and can be done in regular emacs-mode with Ctrl+] for forward search, and Ctrl+Alt+] for backward search.
I recommend the second option. Ctrl+r is really handy and fast, no mucking about with editors, and you s...
How to print the values of slices
... a slice in the same format that you'd use to type it in (something like ["one", "two", "three"]), here's a code example showing how to do that:
package main
import (
"fmt"
"strings"
)
func main() {
test := []string{"one", "two", "three"} // The slice of data
semiformat := fmt....
UIImagePickerController error: Snapshotting a view that has not been rendered results in an empty sn
...t seems that if a previous transition didn't complete and you launch a new one, iOS7 messes the views, where iOS6 seems to manage it correctly.
You should initialize your Camera in your UIViewController, only after the view has Loaded and with a timeout:
- (void)viewDidAppear:(BOOL)animated
{
...
What is the difference between a var and val definition in Scala?
...because I can't replace the object created on the line above with this new one.
x.value = new A(6) // Doesn't work, because I can't replace the object assigned to B.value for a new one.
x.value.value = 6 // Works, because A.value can receive a new object.
}
}
So, even though we can't cha...
When exactly is it leak safe to use (anonymous) inner classes?
... you are asking is a pretty tough question. While you may think it is just one question, you are actually asking several questions at once. I'll do my best with the knowledge that I have to cover it and, hopefully, some others will join in to cover what I may miss.
Nested Classes: Introduction
As ...
How do I convert an object to an array?
..., you can cast using (array) or there's get_object_vars, which Benoit mentioned in
his answer.
// Cast to an array
$array = (array) $object;
// get_object_vars
$array = get_object_vars($object);
They work slightly different from each other. For example, get_object_vars will return an array ...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ot show this weird behavior.
Of course, if an inappropriate alignment is done, it makes things worse. An unnecessary / bad alignment just eats up bytes for no reason and potentially increases cache misses, etc.
The noise it makes pretty much makes timing micro-optimizations
impossible.
H...
How to validate an Email in PHP?
...
This is old post but I will share one my solution because noone mention here one problem before.
New email address can contain UTF-8 characters or special domain names like .live, .news etc.
Also I find that some email address can be on Cyrilic and on all c...
How to list all the files in a commit?
...
If anyone is wondering (like I was) why the first way is "preferred," it goes back to @drizzt 's comment; git show is "porcelain" (meant to be user facing) and git diff-tree is "plumbing" (meant to be used programmatically, e.g. f...