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NodeJS - What does “socket hang up” actually mean?
... request to a Django's development web server over the same connection. It doesn't support keep-alive. And in case your client expects it does, you get the error. It looks along the following lines.
– x-yuri
Jul 19 '19 at 0:41
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Why does (“foo” === new String(“foo”)) evaluate to false in JavaScript?
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"foo" is a string primitive. (this concept does not exist in C# or Java)
new String("foo") is boxed string object.
The === operator behaves differently on primitives and objects.
When comparing primitives (of the same type), === will return true if they both have th...
What does the smiley face “:)” mean in CSS?
...characters? It says "add a non-alphanumeric", not "add one or more...". Or does the : mean something else? Otherwise, can't I put *********************font-size: "150%";, etc.?
– Max
Aug 23 '14 at 15:46
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Find and replace in file and overwrite file doesn't work, it empties the file
...make the changes inline and create a backup of the original file before it does the changes in-place:
sed -i.bak s/STRING_TO_REPLACE/STRING_TO_REPLACE_IT/g index.html
Without the .bak the command will fail on some platforms, such as Mac OSX.
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Why does this async action hang?
...n the UI thread, rather than scheduling it back to the threadpool.
So how does this deadlock? Imagine you just have this code:
var task = dataSource.ExecuteAsync(_ => 42);
var result = task.Result;
So the first line kicks off the asynchronous work. The second line then blocks the UI thread. S...
Android device does not show up in adb list [closed]
..." in my Device Manager. However, running adb devices at the command-line does not show the device.
31 Answers
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Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
...: /data/local/tmp/foo.apk (at Binary XML file line #214): <provider> does not include authorities attribute
D/Finsky (32707): [716] PackageVerificationService.getPackageInfo: Cannot read archive for file:///data/local/tmp/foo.apk in request id=6
D/Finsky (32707): [1] PackageVerificationRecei...
Why does Oracle 9i treat an empty string as NULL?
I know that it does consider ' ' as NULL , but that doesn't do much to tell me why this is the case. As I understand the SQL specifications, ' ' is not the same as NULL -- one is a valid datum, and the other is indicating the absence of that same information.
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Does “untyped” also mean “dynamically typed” in the academic CS world?
...orking in the field seem to be sharing this point of view.
Note that this does not mean that "untyped" and "dynamically typed" are synonyms. Rather, that the latter is a (technically misleading) name for a particular case of the former.
PS: And FWIW, I happen to be both an academic researcher in t...
What does an exclamation mark mean in the Swift language?
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What does it mean to "unwrap the instance"? Why is it necessary?
As far as I can work out (this is very new to me, too)...
The term "wrapped" implies we should think of an Optional variable as a present, wrapped in shiny paper,...