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Why '&&' and not '&'?
...nSave is not executed.
This is very handy in the following circumstance:
string value;
if(dict.TryGetValue(key, out value) && value.Contains("test"))
{
// Do Something
}
TryGetValue returns false if the supplied key is not found in the dictionary. Because of the short-circuiting natu...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
...e significantly slower. 3. PyPy used to be slower than CPython at handling strings - now it's often better and rarely worse. 4. Many "scripts" are just glue code - making the interpreter faster won't improve overall runtimes in that case. 5. PyPy's warmup times used to be larger - short running scri...
How can I assign an ID to a view programmatically?
...the View.setId(integer) for this. In the XML, even though you're setting a String id, this gets converted into an integer. Due to this, you can use any (positive) Integer for the Views you add programmatically.
According to View documentation
The identifier does not have to be unique ...
Does const mean thread-safe in C++11?
... @Ben Voigt: It is my understanding that the C++11 specification for std::string is worded in a way that already forbids COW. I don't remember the specifics, though...
– K-ballo
Jan 2 '13 at 19:18
...
foreach vs someList.ForEach(){}
...vior. For this experiment, I am using .NET 4.7.2:
var names = new List<string>
{
"Henry",
"Shirley",
"Ann",
"Peter",
"Nancy"
};
Lets iterate over this with foreach first:
foreach (var name in names)
{
Console.WriteLine(name);
}
We could expand this into:
using (v...
memory_get_peak_usage() with “real usage”
...4/1024)." MiB\n\n";
$x .= str_repeat(' ', 1024*25); //store 25kb more to string
}
Output:
not real: 0.73469543457031 MiB
real: 0.75 MiB
not real: 0.75910949707031 MiB
real: 1 MiB
...
not real: 0.95442199707031 MiB
real: 1 MiB
not real: 0.97883605957031 MiB
real: 1 MiB
PHP Fatal error: All...
Should I pass an std::function by const-reference?
...ought using const-references where they should be used is common practice (strings and vectors come to mind).
– Sven Adbring
Aug 21 '13 at 19:14
...
Singleton: How should it be used
...er in wikipedia)
In user interface widgets
It is supposed to be a cache
In strings
In Sessions
I can go all day long
How to create the best singleton:
The smaller, the better. I am a minimalist
Make sure it is thread safe
Make sure it is never null
Make sure it is created only once
Lazy or system ...
Explanation of strong and weak storage in iOS5
... Another good one is Helium balloons: as long as at least one string is held, it's not going to float away. The leash/balloon analogies are also good at getting people to forget that "ownership" is managed by retain/release.
– Steve Weller
Feb 13 '...
Protecting executable from reverse engineering?
...memory location wouldnt cause any damage so long as you didnt execute that string of instructions again. You could probably still use a trick like this today as pipelined processors fetch the next instruction. Or if you know that the hardware has a separate instruction and data cache you can modif...