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Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
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The first sample will be translated into:
var bob = String.Concat("abc123", null, null, null, "abs123");
The Concat method checks input and translate null as an empty string
The second sample will be translated into:
var wtf = ((object)null).ToString();
So a null reference exception will ...
Using querySelectorAll to retrieve direct children
...2, 10) to produce the same token more than once.
– Frédéric Hamidi
Jul 29 '13 at 18:41
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Android - Back button in the title bar
In many apps (Calendar, Drive, Play Store) when you tap a button and enter a new activity, the icon in the title bar turns into a back button, but for the app I am making, it doesn't do that. How do I make that icon take you back to the previous screen?
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correct way to define class variables in Python [duplicate]
...u'll see it more clearly with some code:
class MyClass:
static_elem = 123
def __init__(self):
self.object_elem = 456
c1 = MyClass()
c2 = MyClass()
# Initial values of both elements
>>> print c1.static_elem, c1.object_elem
123 456
>>> print c2.static_elem, c2.ob...
Freeze the top row for an html table only (Fixed Table Header Scrolling) [duplicate]
... sticky; /* and other browsers */
– Jørgen Rudolph Låker
Mar 17 at 12:21
1
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how to use sed, awk, or gawk to print only what is matched?
...orked for me as well once I used * instead of +.
– Stéphane
Nov 14 '09 at 8:59
2
...and the "p" ...
How to convert an IPv4 address into a integer in C#?
... I see the issue. Repeated numbers such as 1.1.1.1, 2.2.2.2, 123.123.123.123 always yield the same result. For posterity, see updated fiddle: dotnetfiddle.net/aR6fhc
– Jesse
Mar 9 '18 at 18:30
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Optimizing away a “while(1);” in C++0x
...sume we have the following loops,
where count and count2 are global variables (or have had their address
taken), and p is a local variable, whose address has not been taken:
for (p = q; p != 0; p = p -> next) {
++count;
}
for (p = q; p != 0; p = p -> next) {
++count2;
}
Coul...
getting date format m-d-Y H:i:s.u from milliseconds
...es not work on all locales correctly. Some countries like Germany write "0,1234" or "0.1234" instead of ".1234", therefore your code gives following output for me: 2012-07-08 11:14:15.0.889342
– Daniel Marschall
Apr 18 at 13:14
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How to link to apps on the app store
...2 for the set)
Replace accented and other "decorated" characters (ü, å, etc.) with their elemental character (u, a, etc.)
Leave all other characters as-is.
Listing 2 Punctuation characters that must be removed.
!¡"#$%'()*+,-./:;<=>¿?@[]^_`{|}~
Below are some examp...