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Why would you use an ivar?
...reduce your reference count operations and minimize peak memory usage (if done correctly).
Nontrivial Types
Example: If you have a C++ type, direct access is just the better approach sometimes. The type may not be copyable, or it may not be trivial to copy.
Multithreading
Many of your ivars are code...
The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or
..., x[[i]] or x[i] will return the ith sequential element of x.
For lists, one generally uses [[ to select any single element, whereas [ returns a list of the selected elements.
The [[ form allows only a single element to be selected using integer or character indices, whereas [ allows indexing by...
Multiple github accounts on the same computer?
...o:
git push
To ensure that the commits appear as performed by USERNAME, one can setup the user.name and user.email for this project, too:
git config user.name USERNAME
git config user.email USERNAME@example.com
share
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What is an anti-pattern?
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@Tomasz Programming Pasta serves is one such example. It's best generalized as poor encapsulation between many small objects. Consider it the opposite of the God object en.wikipedia.org/wiki/Spaghetti_code
– AWrightIV
Sep ...
What are the best practices for structuring a large Meteor app with many HTML template files? [close
In all the examples (leaderboard, wordplay, etc.) they have one single HTML template file. Is there some large open source Meteor project with many different HTML template files we can use as a best practice example? Doesn't seem practical to put everything a large app needs all in one template fi...
How to replace ${} placeholders in a text file?
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You can combine those two sed commands into one: sed -e "s/\${i}/1/" -e "s/\${word}/dog/"; that is more efficient. You can run into problems with some versions of sed at maybe 100 such operations (problem from years ago - may not still be true, but beware HP-UX).
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Initialization of an ArrayList in one line
...hich has an instance initializer, and that class is created just to create one object -- that just seems like a little bit overkill to me.
What would have been nice was if the Collection Literals proposal for Project Coin was accepted (it was slated to be introduced in Java 7, but it's not likely t...
What are the pros and cons of git-flow vs github-flow? [closed]
...elease, and hotfix.
The process of feature or bug development flows from one branch into another before it’s finally released.
Some of the respondents indicated that they use git-flow in general.
Some started out with git-flow and moved away from it.
The primary reason for moving aw...
Is there a performance difference between i++ and ++i in C?
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So the "No" is true for the one compiler you tested with.
– Andreas
Jan 25 '11 at 8:59
174
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Check if one IEnumerable contains all elements of another IEnumerable
What is the fastest way to determine if one IEnumerable contains all the elements of another IEnumerable when comparing a field/property of each element in both collections?
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