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Why use symbols as hash keys in Ruby?
... value look ups since hashing a symbol is equivalent to hashing an integer vs hashing a string.
Disadvantage: consumes a slot in the program's symbol table that is never released.
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How can I pass selected row to commandLink inside dataTable or ui:repeat?
...nversion, use <f:viewParam> on the target view, see also f:viewParam vs @ManagedProperty:
<f:viewParam name="id" value="#{bean.id}" required="true" />
Either way, this has the advantage that the datamodel doesn't necessarily need to be preserved for the form submit (for the case that y...
What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
...am eager to see how they behave under ARC.
For more on garbage collection vs. ARC, see this very interesting response by Chris Lattner on the Objective-C mailing list, where he lists many advantages of ARC over Objective-C 2.0 garbage collection. I've run into several of the GC issues he describes...
What is a “callback” in C and how are they implemented?
...ion at https://msdn.microsoft.com/en-us/library/windows/desktop/ms737526(v=vs.85).aspx
This application starts a listen() on the local host, 127.0.0.1, using port 8282 so you could use either telnet 127.0.0.1 8282 or http://127.0.0.1:8282/.
This sample application was created as a console applicat...
In what areas might the use of F# be more appropriate than C#? [closed]
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community wiki
3 revs, 2 users 97%simon cousins
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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...mply need to discern between a text field that is indexable (such varchar) vs something that is not (like a text or CLOB field). The indexable fields tend to have a limit on size to facilitate the index whereas the CLOB fields do not (within reason).
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What are the benefits of learning Vim? [closed]
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community wiki
7 revs, 6 users 33%Andrew Hendrie
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Changing the background drawable of the searchview widget
...s. However, there's a difference in 9-patches for default state (see Light vs Dark). So, probably there's no need to make local copies of 9-patches for selected state, for both Dark and Light themes (assuming that you want to handle both, and make them both look the same as in Holo Theme). Simply ma...
What's the difference between an inverted index and a plain old index?
...and right, then you'd have the same issue figuring out what a "right turn" vs a "left turn" is since the agreed upon meaning had changed. However, the naming is arbitrary, so which one is which (in and of itself) doesn't matter - what matters is that we all agree on the meaning.
In your comment whe...
Why is std::map implemented as a red-black tree?
... consider the performance hit for a modification of a tree (significative) VS the performance hit of consultation of a tree (almost insignificant), it become natural to prefer RB over AVL for a general case.
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