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How should one use std::optional?
...archy, instead of passing around some "phantom" value "assumed" to have a "error" meaning.
– Luis Machuca
Oct 3 '13 at 16:35
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How do you run your own code alongside Tkinter's event loop?
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The solution posted by Bjorn results in a "RuntimeError: Calling Tcl from different appartment" message on my computer (RedHat Enterprise 5, python 2.6.1). Bjorn might not have gotten this message, since, according to one place I checked, mishandling threading with Tkinter ...
How to print out a variable in makefile
...so pointed by 'bobbogo' in the below answer,
you can use info / warning / error to display text.
$(error text…)
$(warning text…)
$(info text…)
To print variables,
$(error VAR is $(VAR))
$(warning VAR is $(VAR))
$(info VAR is $(VAR))
'error' would stop the make execution, after...
ATL正则表达式库使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
... // five match groups: scheme, authority, path, query, fragment
REParseError status = reUrl.Parse(
"({[^:/?#]+}:)?(//{[^/?#]*})?{[^?#]*}(?{[^#]*})?(#{.*})?" );
if (REPARSE_ERROR_OK != status)
{
// Unexpected error.
return 0;
}
CAtlREMatchContext<> mcUrl;
...
Where and why do I have to put the “template” and “typename” keywords?
...en an instantiation is needed, they parse the template and possibly detect errors in the definition. But instead of bothering the template's users (poor colleagues!) with errors made by a template's author, other implementations choose to check templates early on and give errors in the definition as...
How to define an empty object in PHP
...ject from empty value
This could be a problem if your configuration (see error reporting level) shows this warning to the browser. This is another entire topic, but a quick and dirty approach could be using the error control operator (@) to ignore the warning:
$oVal = new stdClass();
@$oVal->k...
What is the most efficient way to concatenate N arrays?
...
I believe your test may have an error: the a.concat(b) test case seems to be needlessly making a copy of the array a then throwing it away.
– ninjagecko
Apr 22 '12 at 21:35
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How to safely call an async method in C# without await
... } } Usage: MyAsyncMethod().PerformAsyncTaskWithoutAwait(t => log.ErrorFormat("An error occurred while calling MyAsyncMethod:\n{0}", t.Exception));
– Mark Avenius
Jun 24 '15 at 14:13
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How do I add a submodule to a sub-directory?
...hub.com:...> in the snipmate-snippets directory, I get the following error message:
5 Answers
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Getting the last revision number in SVN?
... output in XML like so:
$output = `svn info $url --xml`;
If there is an error then the output will be directed to stderr. To capture stderr in your output use thusly:
$output = `svn info $url 2>&1`;
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