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How to properly assert that an exception gets raised in pytest?
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pytest.raises(Exception) is what you need.
Code
import pytest
def test_passes():
with pytest.raises(Exception) as e_info:
x = 1 / 0
def test_passes_without_info():
with pytest.raises(Exception):
x = 1 / 0
def test_fails():
with pytest.raises(Exception) as e_info:
...
Do sealed classes really offer performance Benefits?
...
The JITter will sometimes use non-virtual calls to methods in sealed classes since there is no way they can be extended further.
There are complex rules regarding calling type, virtual/nonvirtual, and I don't know them all so I can't really outline them for you, but ...
Ruby on Rails and Rake problems: uninitialized constant Rake::DSL
I'm having a really frustrating issue: Rake is being dumb.
19 Answers
19
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Move capture in lambda
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Generalized lambda capture in C++14
In C++14 we will have the so called generalized lambda capture. This enables move capture. The following will be legal code in C++14:
using namespace std;
// a unique_ptr is move-only
auto u = make_unique<some_type>( some, parameters );
// move...
How can I create download link in HTML?
... new browser window appear before the download starts. That window will usually be closed when the browser discovers that the resource is a file download.
Note that file types known to the browser (e.g. JPG or GIF images) will usually be opened within the browser.
You can try sending the right hea...
Is it possible to use “/” in a filename?
...hould ever be done, but is there a way to use the slash character that normally separates directories within a filename in Linux?
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Can't ignore UserInterfaceState.xcuserstate
...ked"
Alternatively you can use the -a option to git commit that will add all files that have been modified or deleted.
Once you've removed the file from git, it will respect your .gitignore.
share
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How do I put hint in a asp:textbox
...ith ASP.net are passed through and rendered as is. So the above code (basically) renders to:
<input type="text" placeholder="hint"/>
Using placeholder in resources
A fine way of applying the hint to the control is using resources. This way you may have localized hints. Let's say you have a...
How do I bind a WPF DataGrid to a variable number of columns?
... property is ReadOnly, like everyone noticed, I made an Attached Property called BindableColumns which updates the Columns in the DataGrid everytime the collection changes through the CollectionChanged event.
If we have this Collection of DataGridColumn's
public ObservableCollection<DataGrid...
What is the bit size of long on 64-bit Windows?
...pointers for 64-bit platforms. The two mostly widely used were ILP64 (actually, only a very few examples of this; Cray was one such) and LP64 (for almost everything else). The acronynms come from 'int, long, pointers are 64-bit' and 'long, pointers are 64-bit'.
Type ILP64 LP64 LLP64...