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Rails: update_attribute vs update_attributes
...nd(name.to_s + '=', value)
2616: save(false)
2617: end
and now refer update_attributes and look at its code you get
# File vendor/rails/activerecord/lib/active_record/base.rb, line 2621
2621: def update_attributes(attributes)
2622: self.attributes = attributes
26...
Difference between pre-increment and post-increment in a loop?
...
a++ is known as postfix.
add 1 to a, returns the old value.
++a is known as prefix.
add 1 to a, returns the new value.
C#:
string[] items = {"a","b","c","d"};
int i = 0;
foreach (string item in items)
{
Console.WriteLine(++...
Exif manipulation library for python [closed]
...projects/gexiv2/wiki (became https://wiki.gnome.org/Projects/gexiv2) reads now:
This will work equally well with either Python 2 or 3, which makes
GExiv2 an excellent replacement for pyexiv2, which only supports
Python 2.
So, both Python2 and Python3 are now supported by GExiv2.
Good news...
How to generate all permutations of a list?
...re using an older Python (<2.6) for some reason or are just curious to know how it works, here's one nice approach, taken from http://code.activestate.com/recipes/252178/:
def all_perms(elements):
if len(elements) <=1:
yield elements
else:
for perm in all_perms(elemen...
Real escape string and PDO [duplicate]
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@SteD: Thanks, I'm reading it now.
– John
Sep 15 '10 at 9:50
8
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How to hide the keyboard when I press return key in a UITextField?
...
class MyViewController: UIViewController, UITextFieldDelegate {
....
}
Now add a delegate to a TextField in which you want to dismiss the keyboard when return is tapped either in viewDidLoad method like below or where you are initializing it.
For eg.
override func viewDidLoad() {
super.vie...
How to convert timestamps to dates in Bash?
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@Bruno, how do you know date is faster than gawk.?
– ghostdog74
Mar 3 '10 at 14:23
3
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What is the best way to unit test Objective-C code?
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Xcode 5 now has XCTest does it still include OCUnit? Will you update your answer with information for XCode 5.
– BrightIntelDusk
Mar 24 '14 at 22:48
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Random color generator
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@Mohsen, FYI every now and then your code produces invalid 5 digit number
– rochal
Nov 5 '11 at 18:05
6
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Cannot hide status bar in iOS7
I just upgraded my iPhone 5 iOS 7 to four beta version. Now when I run my app from Xcode 5 on this iPhone, status bar doesn’t hide, even though it should.
...