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String.IsNullOrWhiteSpace in LINQ Expression
...
You need to replace
!string.IsNullOrWhiteSpace(b.Diameter)
with
!(b.Diameter == null || b.Diameter.Trim() == string.Empty)
For Linq to Entities this gets translated into:
DECLARE @p0 VarChar(1000) = ''
...
WHERE NOT (([t0].[Diameter] IS NULL) OR (LTRIM(RTRIM([t0].[D...
What is PECS (Producer Extends Consumer Super)?
...ly stuffing items in, it is a consumer and you should use super. If you do both with the same collection, you shouldn't use either extends or super.
Suppose you have a method that takes as its parameter a collection of things, but you want it to be more flexible than just accepting a Collection&l...
Is there an exponent operator in C#?
...er, the .NET Framework offers the Math.Pow method:
Returns a specified number raised to the specified power.
So your example would look like this:
float Result, Number1, Number2;
Number1 = 2;
Number2 = 2;
Result = Math.Pow(Number1, Number2);
...
JavaScript style for optional callbacks
I have some functions which occasionally (not always) will receive a callback and run it. Is checking if the callback is defined/function a good style or is there a better way?
...
How to pass optional arguments to a method in C++?
...Here is an example of passing mode as optional parameter
void myfunc(int blah, int mode = 0)
{
if (mode == 0)
do_something();
else
do_something_else();
}
you can call myfunc in both ways and both are valid
myfunc(10); // Mode will be set to default 0
myfunc(10, 1); ...
Convert bytes to a string
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You need to decode the bytes object to produce a string:
>>> b"abcde"
b'abcde'
# utf-8 is used here because it is a very common encoding, but you
# need to use the encoding your data is actually in.
>>> b"abcde".decode("utf-8") ...
Converting a view to Bitmap without displaying it in Android?
...
there is a way to do this. you have to create a Bitmap and a Canvas and call view.draw(canvas);
here is the code:
public static Bitmap loadBitmapFromView(View v) {
Bitmap b = Bitmap.createBitmap( v.getLayoutParams().width, v.getLayoutParams().height, Bitmap.Config.AR...
How to remove the lines which appear on file B from another file A?
... (consisting of emails), one line for each mail. I also have another file B that contains another set of mails.
9 Answers...
Why is it OK to return a 'vector' from a function?
...this type of code several times. words is a local vector. How is it possible to return it from a function?
6 Answers
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How do I merge a list of dicts into a single dict?
...for d in L:
... result.update(d)
...
>>> result
{'a':1,'c':1,'b':2,'d':2}
As a comprehension:
# Python >= 2.7
{k: v for d in L for k, v in d.items()}
# Python < 2.7
dict(pair for d in L for pair in d.items())
...