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Append an object to a list in R in amortized constant time, O(1)?
If I have some R list mylist , you can append an item obj to it like so:
17 Answers
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What is the $$hashKey added to my JSON.stringify result
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Angular adds this to keep track of your changes, so it knows when it needs to update the DOM.
If you use angular.toJson(obj) instead of JSON.stringify(obj) then Angular will strip out these internal-use values for you.
Also, if you change your repeat expression to use the track ...
中文网（自研/维护）拓展 · App Inventor 2 中文网
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NotificationStyle
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PhoneInfo
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SQLite
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Convert a String In C++ To Upper Case
... I can't get why does compiler reject this code without :: qualifier before toupper. Any ideas?
– sasha.sochka
Sep 24 '13 at 19:25
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How do i find out what all symbols are exported from a shared object?
...d library on AIX), a UNIX shared library, or a Windows DLL? These are all different things, and your question conflates them all :-(
For an AIX shared object, use dump -Tv /path/to/foo.o.
For an ELF shared library, use readelf -Ws /path/to/libfoo.so, or (if you have GNU nm) nm -D /path/to/libfoo.s...
List all base classes in a hierarchy of given class?
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If your class inherits from a class that inherits from a class, only the first part of the chain will be in its __bases__
– Boris
Nov 25 '19 at 22:56
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Debug code-first Entity Framework migration codes
... I'm just wondering if there is any way to debug the migration codes. You know, like setting breakpoints and stuff like this.
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Finding current executable's path without /proc/self/exe
...t seems to me that Linux has it easy with /proc/self/exe. But I'd like to know if there is a convenient way to find the current application's directory in C/C++ with cross-platform interfaces. I've seen some projects mucking around with argv[0], but it doesn't seem entirely reliable.
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What is the best way to detect a mobile device?
...ackberry|iemobile|opera mini/i.test(navigator.userAgent.toLowerCase()));
Now $.browser will return "device" for all above devices
Note: $.browser removed on jQuery v1.9.1. But you can use this by using jQuery migration plugin Code
A more thorough version:
var isMobile = false; //initiate as f...
How to make an array of arrays in Java
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Quick question: How will I do this at run time if I have no idea how many array objects will be created?
– Terence Ponce
Jan 24 '11 at 11:30
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