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Why does ConcurrentHashMap prevent null keys and values?
...) returns null, you
can't detect whether the key explicitly maps to null vs the key isn't
mapped. In a non-concurrent map, you can check this via
map.contains(key), but in a concurrent one, the map might have changed
between calls.
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In a .csproj file, what is for?
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Like you say, seems None vs Content only has effect for the publish step not the build step. For the build step seems CopyToOutputDirectory can be set on either and that controls if the file is copied by the build step. Also seems odd that by default...
WAMP shows error 'MSVCR100.dll' is missing when install
...crosoft.com)
Press the Download button and on the following screen select VSU_4\vcredist_x86.exe
Press the Download button and on the following screen select VSU_4\vcredist_x64.exe
Source : http://forum.wampserver.com/read.php?2,123608
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Difference between encoding and encryption
...er the Internet.
Reference URL: http://danielmiessler.com/study/encoding_vs_encryption/
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Where's my JSON data in my incoming Django request?
...42 . Fixed in 1.7
http://homakov.blogspot.in/2012/06/x-www-form-urlencoded-vs-json-pros-and.html
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How to specify test directory for mocha?
...t also avoids all these cross-platform issues in the other answers (double vs single quotes, "find", etc.)
To have mocha run all js files in the "test" directory:
"scripts": {
"start": "node ./bin/www", -- not required for tests, just here for context
"test": "mocha test/**/*.js"
},
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pandas: filter rows of DataFrame with operator chaining
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No, it wouldn't because it give bollean results (True vs False) instead of as it is above which filter all data which satisfy the condition. Hope that I made it clear.
– MGB.py
Dec 19 '19 at 9:02
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How to get the ActionBar height?
... same thing when using tabs. Problem is it's sometimes hard to detect tabs vs. no tabs, since some devices visually collapse the tabs into the base ActionBar in some situations. So what worked for me is just ActionBar.getHeight(). Depending on the situation, that may work for you too.
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What's the key difference between HTML 4 and HTML 5?
...ith a text/html MIME type that follow this spec.
The same goes for XHTML 5 vs. XHTML5.
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Why not use tables for layout in HTML? [closed]
...able-based layout.
– Richard Ev
Nov 27 '08 at 11:33
16
@tharkun & Richard: How come "semantic...