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In which scenario do I use a particular STL container?
... section on the STL and its containers. Now I do understand each and every one of them have their own specific properties, and I'm close to memorizing all of them... But what I do not yet grasp is in which scenario each of them is used.
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mkdir's “-p” option
So this doesn't seem like a terribly complicated question I have, but it's one I can't find the answer to. I'm confused about what the -p option does in Unix. I used it for a lab assignment while creating a subdirectory and then another subdirectory within that one. It looked like this:
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Java Persistence / JPA: @Column vs @Basic
...in JPA? Can they be used together? Should they be used together? Or does one of them suffice?
4 Answers
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Why are these constructs using pre and post-increment undefined behavior?
...lem, there is no "should" involved. If the undefined behavior changes when one of the involved variables is declared volatile, that doesn't prove or change anything. It is undefined; you cannot reason about the behavior.
Your most interesting-looking example, the one with
u = (u++);
is a text-bo...
Map.clear() vs new Map : Which one will be better? [duplicate]
... you go with .clear(),so you are using same object instead of creating new one
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How to Copy Contents of One Canvas to Another Canvas Locally
I'd like to copy ALL contents of one canvas and transfer them to another all on the client-side. I would think that I would use the canvas.toDataURL() and context.drawImage() method to implement this but I am running into a few issues.
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An App ID with Identifier '' is not available. Please enter a different string
...fault in Safari. Didn't see that there are more entries... Because all the ones created by Xcode start with XC, they appear at the bottom...
– endavid
Sep 15 '19 at 10:43
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How can I start an interactive console for Perl?
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Not only did Matt Trout write an article about a REPL, he actually wrote one - Devel::REPL
I've used it a bit and it works fairly well, and it's under active development.
BTW, I have no idea why someone modded down the person who mentioned using "perl -e" from the console. This isn't really a RE...
Best way to remove from NSMutableArray while iterating?
...mory and processing cost of allocating a new array, and discarding the old one?) but even if it's faster it may not be as big a deal as it would be for a naive implementation, because NSArrays do not behave like "normal" arrays. They talk the talk but they walk a different walk. See a good analysis...
SQL Server String or binary data would be truncated
...n project. I am getting the following error when I try to insert data from one table into another table (SQL Server 2005):
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