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Find index of last occurrence of a substring in a string
...e. Else you may search for minutes where the unexpected value -1 is coming from within your code...
Example: Search of last newline character
>>> txt = '''first line
... second line
... third line'''
>>> txt.rfind('\n')
22
>>> txt.rindex('\n')
22
...
How to use “/” (directory separator) in both Linux and Windows in Python?
... you are fortunate enough to be running Python 3.4+, you can use pathlib:
from pathlib import Path
path = Path(dir, subdir, filename) # returns a path of the system's path flavour
or, equivalently,
path = Path(dir) / subdir / filename
...
When to use std::forward to forward arguments?
...rek's answer is very useful, but it doesn't completely answer the question from the title:
When to use std::forward to forward arguments?
In order to answer it, we should first introduce a notion of universal references. Scott Meyers gave this name and nowadays they are often called forwarding...
ASP.NET MVC ambiguous action methods
...
we can use valueprovider to get values from several sources like : controllerContext.Controller.ValueProvider.GetValue(value);
– Jone Polvora
Jul 22 '13 at 7:37
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Why are C# 3.0 object initializer constructor parentheses optional?
...mbiguous even in C# 1.0:
G((T)-x)
Is that "cast -x to T" or "subtract x from T"? Again, we have a heuristic that makes a good guess.
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LLVM vs clang on OS X
...swer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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[A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to… web.config issue
...using VS2013, MVC 5.2.2.0, Web Api 2. I have just changed the all versions from 2.0.0.0 to 3.0.0.0 of the following section of Web.config resides inside the View folder of my project.
<configSections>
<sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configurat...
NULL vs nullptr (Why was it replaced?) [duplicate]
...with NULL is that people sometimes mistakenly believe that it is different from 0 and/or not an integer. In pre-standard code, NULL was/is sometimes defined to something unsuitable and therefore had/has to be avoided. That's less common these days.
If you have to name the null pointer, call it ...
C++ IDE for Macs [closed]
... Eclipse that can be configured to build and compile C++ projects.
Clion from JetBrains, also is available now, and uses Cmake as project model.
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mongodb count num of distinct values per field/key
...ation API. To complicate the case we're grouping by case-insensitive words from array property of the document.
db.articles.aggregate([
{
$match: {
keywords: { $not: {$size: 0} }
}
},
{ $unwind: "$keywords" },
{
$group: {
_id: {$toLowe...