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Does reading an entire file leave the file handle open?
...hat on the particular Python implementation.
To understand what this is all about, pay particular attention to the actual file object. In your code, that object is mentioned only once, in an expression, and becomes inaccessible immediately after the read() call returns.
This means that the file...
How do I force a favicon refresh?
I have a Grails application running locally using its own tomcat and I have just changed the favicon for a new one. Problem is that I can not see it in any browser. The old favicon shows up or I get no favicon at all, but not my new one. I do not think this is a Grails issue per se, more an issue...
Include all existing fields and add new fields to document
...t aggregation stage where I can instruct it to add a new field and include all existing fields, without having to list all the existing fields.
...
How to wait for several Futures?
...ave several futures and need to wait until either any of them fails or all of them succeed.
8 Answers
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How to check if the string is empty?
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s.strip() allocates a new string, which is pure waste. Use string.isspace()
– Clément
Jun 22 at 15:27
add a ...
Split large string in n-size chunks in JavaScript
...spaces, it does not count in the length"? Yes, . does not match newline at all. I will update the answer so that it takes \n and \r into account.
– Vivin Paliath
Apr 17 '15 at 21:14
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Is there a query language for JSON?
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Sure, how about:
JsonPath.
Json Query
They all seem to be a bit work in progress, but work to some degree. They are also similar to XPath and XQuery conceptually; even though XML and JSON have different conceptual models (hierarchic vs object/struct).
EDIT Sep-2015: ...
C++代码执行安装包静默安装 - C/C++ - 清泛网 - 专注C/C++及内核技术
... szCmdline = _T("/NCRC /S /D=\"");
szCmdline.Append( DEFAULT_INSTALL_PATH );
szCmdline.Append( _T("\"") );
CreateProcess( szSetupPath, szCmdline.GetBuffer(), NULL, FALSE, NULL, NULL, NULL, szWorking, &si, &pi );
WaitForSingleObject( m_hCreatePackage, INFINITE ); // 这种方...
Is there a performance difference between a for loop and a for-each loop?
... iterator or index variable
completely. The resulting idiom
applies equally to collections and
arrays:
// The preferred idiom for iterating over collections and arrays
for (Element e : elements) {
doSomething(e);
}
When you see the colon (:), read it as
“in.” Thus, the loop ab...
Stop/Close webcam which is opened by navigator.getUserMedia
...
EDIT
Since this answer has been originally posted the browser API has changed.
.stop() is no longer available on the stream that gets passed to the callback.
The developer will have to access the tracks that make up the stream (audio or video) and stop each of th...