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Is there any performance gain in indexing a boolean field?
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Java Enum definition
...lt;E> is sufficient in all cases. And in Generics you should only use a more restrictive bound if it's actually necessary to ensure type safety.
– newacct
Feb 26 '15 at 0:01
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Check for installed packages before running install.packages() [duplicate]
...r) and signal - both have a function filter. Since I use dplyr::filter way more often, I wanted a way to check if signal is installed but not load it.
– Mario Reutter
Apr 11 '19 at 9:33
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Questions every good .NET developer should be able to answer? [closed]
...many categories, each category has many posts, and each post can belong to more than one category. Ask your applicant to write queries to pull specific information out.
Next, look for specific technical know-how:
(Event handlers) Create a class with a custom event handler, create another class w...
How are virtual functions and vtable implemented?
...ists of addresses to the virtual functions for classes that contain one or more virtual functions. The object of the class containing the virtual function contains a virtual pointer that points to the base address of the virtual table in memory. Whenever there is a virtual function call, the v-table...
Best way to encode text data for XML in Java?
... that there may not be an "encoding strings for XML output" method - I was more recommending that the whole XML task should be done with a library rather than just doing bits at a time with string manipulation.
– Jon Skeet
Nov 16 '09 at 6:28
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Why doesn't delete set the pointer to NULL?
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I think this could use some more explanation. I'm not even sure what he's saying...I suppose I'll have to come back at a later time when I can dedicate a couple hrs to researching this until I get it. Or, you could expound upon the answer to help us und...
Compiled vs. Interpreted Languages
... to run a compilation stage: can execute code directly "on the fly"
Can be more convenient for dynamic languages
Note that modern techniques such as bytecode compilation add some extra complexity - what happens here is that the compiler targets a "virtual machine" which is not the same as the unde...
Defining private module functions in python
...ends on "consenting adults'" levels of agreement - you can't force it (any more than you can in real life;-). A single leading underscore means you're not supposed to access it "from the outside" -- two leading underscores (w/o trailing underscores) carry the message even more forcefully... but, in...
What is aria-label and how should I use it?
...ud to the user, taking cues from the HTML (e.g. an h1 should be emphasised more than a p, a is clearly a link, form` indicates somewhere to enter information, aria-* attributes give further clues to what the elements do, etc).
– Olly Hodgson
Feb 26 '14 at 13:0...