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How to copy a dictionary and only edit the copy
...'c': 3, 'b': {'m': 4, 'o': 6, 'n': 5}}
Regarding shallow vs deep copies, from the Python copy module docs:
The difference between shallow and deep copying is only relevant for compound objects (objects that contain other objects, like lists or class instances):
A shallow copy construct...
What characters do I need to escape in XML documents?
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From Wikipedia: "All permitted Unicode characters may be represented with a numeric character reference." So there are a lot more than 5.
– Tim Cooper
Aug 15 '14 at 7:47
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Linux how to copy but not overwrite? [closed]
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Taken from the man page:
-n, --no-clobber
do not overwrite an existing file (overrides a previous -i option)
Example:
cp -n myoldfile.txt mycopiedfile.txt
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Could not load file or assembly … The parameter is incorrect
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OMG! I got over 4GB from prehistoric projects of mine in those places! Doesn't this thing ever clean up?!?! Thanks!
– user2173353
Dec 1 '14 at 9:02
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How to have conditional elements and keep DRY with Facebook React's JSX?
...f when a developer (me) tries to transfer patterns and approaches he knows from one area to another but it doesn't really work (in this case other template languages).
If you need a conditional element, do it like this:
render: function () {
return (
<div id="page">
{...
Cannot set property 'innerHTML' of null
...erty
'innerHTML' of null?
The browser always loads the entire HTML DOM from top to bottom. Any JavaScript code written inside the script tags (present in head section of your HTML file) gets executed by the browser rendering engine even before your whole DOM (various HTML element tags present wi...
Correct way to use _viewstart.cshtml and partial Razor views?
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If you return PartialView() from your controllers (instead of return View()), then _viewstart.cshtml will not be executed.
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Impossible to make a cached thread pool with a size limit?
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My only worry about this is (from the JDK 8 docs): "When a new task is submitted in method execute(Runnable), and fewer than corePoolSize threads are running, a new thread is created to handle the request, even if other worker threads are idle."
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Undefined reference to static constexpr char[]
...ition for a static constexpr member if it is not odr-used, we can see this from the draft C++11 standard section 9.4.2 [class.static.data] which says (emphasis mine going forward):
[...]A static data member of literal type can be declared in the class
definition with the constexpr specifier; i...
how to check the jdk version used to compile a .class file [duplicate]
...ws:
javap -verbose MyClass | findstr "major"
You want the major version from the results. Here are some example values:
Java 1.2 uses major version 46
Java 1.3 uses major version 47
Java 1.4 uses major version 48
Java 5 uses major version 49
Java 6 uses major version 50
Java 7 uses major versio...