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Is there any overhead to declaring a variable within a loop? (C++)
... for local variables is usually allocated in function scope. So no stack pointer adjustment happens inside the loop, just assigning 4 to var. Therefore these two snippets have the same overhead.
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Is there a performance difference between i++ and ++i in C?
... code for this function,
both with ++i and i++.
$ cat i++.c
extern void g(int i);
void f()
{
int i;
for (i = 0; i < 100; i++)
g(i);
}
The files are the same, except for ++i and i++:
$ diff i++.c ++i.c
6c6
< for (i = 0; i < 100; i++)
---
> for (i = 0; i < ...
Dialog with transparent background in Android
...r/transparent</item>
<item name="android:colorBackgroundCacheHint">@null</item>
</style>
One can set this theme to dialog as below
final Dialog dialog = new Dialog(this, R.style.DialogCustomTheme);
Enjoy!!
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no new variables on left side of :=
...ent as you are assigning a new value to existing variable.
myArray = [...]int{11,12,14}
colon : is used when you perform the short declaration and assignment for the first time as you are doing in your first statement i.e. myArray :=[...]int{12,14,26}.
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How do I get the row count of a pandas DataFrame?
...s @Dan Allen noted in the comments len(df.index) and df[0].count() are not interchangeable as count excludes NaNs,
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Delete duplicate records in SQL Server?
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and T1.uniqueField > T2.uniqueField
(this assumes that you have an integer based unique field)
Personally though I'd say you were better off trying to correct the fact that duplicate entries are being added to the database before it occurs rather than as a post fix-it operation.
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Can (domain name) subdomains have an underscore “_” in it?
...r, domain name parts must be 63 octets or shorter in
length.... All post-converted name parts that contain internationalized characters begin with the string "bq--". (...) The string "bq--" was chosen because it is extremely unlikely
to exist in host parts before this specification was produced....
Can a local variable's memory be accessed outside its scope?
...al the key!
A week later, you return to the hotel, do not check in, sneak into your old room with your stolen key, and look in the drawer. Your book is still there. Astonishing!
How can that be? Aren't the contents of a hotel room drawer inaccessible if you haven't rented the room?
Well, obviousl...
How to set tint for an image view programmatically in android?
Need to set tint for an image view... I am using it the following way:
22 Answers
22
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Creating instance of type without default constructor in C# using reflection
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I originally posted this answer here, but here is a reprint since this isn't the exact same question but has the same answer:
FormatterServices.GetUninitializedObject() will create an instance without calling a constructor. I found this class by using Reflector and digging throu...