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Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate]
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The compiler first tries to evaluate the right-hand expression:
GetBoolValue() ? 10 : null
The 10 is an int literal (not int?) and null is, well, null. There's no implicit conversion between those two hence the error message.
If you change the right-hand expression to one o...
How do I detect whether a Python variable is a function?
I have a variable, x , and I want to know whether it is pointing to a function or not.
25 Answers
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Why are there no ++ and -- operators in Python?
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It's not because it doesn't make sense; it makes perfect sense to define "x++" as "x += 1, evaluating to the previous binding of x".
If you want to know the original reason, you'll have to either wade through old Python mailing lists or ask somebody who was there (eg. Guido), but it's easy enough ...
How to bind an enum to a combobox control in WPF?
I am trying to find a simple example where the enums are shown as is. All examples I have seen tries to add nice looking display strings but I don't want that complexity.
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How to convert a string to an integer in JavaScript?
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The simplest way would be to use the native Number function:
var x = Number("1000")
If that doesn't work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods.
parseInt:
var x = parseInt("1000", 10); // you want to use radix 10
// so you ge...
Pass a parameter to a fixture function
...est as others have noted pytest now supports indirect parametrization of fixtures. For example you can do something like this (via @imiric):
# test_parameterized_fixture.py
import pytest
class MyTester:
def __init__(self, x):
self.x = x
def dothis(self):
assert self.x
@p...
What does this symbol mean in JavaScript?
...is is a collection of questions that come up every now and then about syntax in JavaScript. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
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Linq Syntax - Selecting multiple columns
This is my Linq Syntax which I am using to my entity model
3 Answers
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C/C++ check if one bit is set in, i.e. int variable
... @Eduard: in C, everything != 0 is true, so why bother? 1 is exactly as true as 0.1415!
– Christoph
Feb 7 '09 at 13:39
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How to find list intersection?
actual output: [1,3,5,6]
expected output: [1,3,5]
11 Answers
11
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