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What is the usefulness of `enable_shared_from_this`?
...ran across enable_shared_from_this while reading the Boost.Asio examples and after reading the documentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense.
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jQuery - setting the selected value of a select control via its text description
I have a select control, and in a javascript variable I have a text string.
21 Answers
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Error handling with node.js streams
What's the correct way to handle errors with streams? I already know there's an 'error' event you can listen on, but I want to know some more details about arbitrarily complicated situations.
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What's the difference between ViewData and ViewBag?
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It uses the C# 4.0 dynamic feature. It achieves the same goal as viewdata and should be avoided in favor of using strongly typed view models (the same way as viewdata should be avoided).
So basically it replaces magic strings:
ViewData["Foo"]
with magic properties:
ViewBag.Foo
for which you ...
Multiple inheritance/prototypes in JavaScript
... false,
}));
}
Explanation
A proxy object consists of a target object and some traps, which define custom behavior for fundamental operations.
When creating an object which inherits from another one, we use Object.create(obj). But in this case we want multiple inheritance, so instead of obj I ...
How do I detect if software keyboard is visible on Android Device or not?
Is there a way in Android to detect if the software (a.k.a. "soft") keyboard is visible on screen?
30 Answers
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The resulting API analysis is too large when upload app to mac store
...does an initial scan, checking for method names, instance variable access, and even @selector usage with private method names. App Loader doesn't always do a great job, and the more source files you have the more likely it is to give you the warning that the API analysis file it has generated is "to...
Git clone without .git directory
...st bit of history possible to get that repo.
The branch option is optional and if not specified would get master.
The second line will make your directory dirformynewrepo not a Git repository any more.
If you're doing recursive submodule clone, the depth and branch parameter don't apply to the submo...
Growing Amazon EBS Volume sizes [closed]
I'm quite impressed with Amazon's EC2 and EBS services. I wanted to know if it is possible to grow an EBS Volume.
11 Answer...
What makes a keychain item unique (in iOS)?
...ws (derived from open source files from Apple, see Schema.m4, KeySchema.m4 and SecItem.cpp):
For a keychain item of class kSecClassGenericPassword, the primary key is the combination of
kSecAttrAccount and kSecAttrService.
For a keychain item of class kSecClassInternetPassword, the primary key is...