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Scala: List[Future] to Future[List] disregarding failed futures
...re that none of the futures has failed. .recover is your friend here, you can combine it with map to convert all the Future[T] results to Future[Try[T]]] instances, all of which are certain to be successful futures.
note: You can use Option or Either as well here, but Try is the cleanest way if yo...
What are the mechanics of short string optimization in libc++?
...ever, I would like to know in more detail how it works in practice, specifically in the libc++ implementation:
2 Answers
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Easiest way to rename a model using Django/South?
...(self, orm):
db.rename_table('yourapp_bar','yourapp_foo')
You can accomplish this more simply using the db_table Meta option in your model class. But every time you do that, you increase the legacy weight of your codebase -- having class names differ from table names makes your code ha...
Removing projects in Sublime Text 2 and 3
...ted from the recent projects list. Unfortunately, it does not and the list can become littered with projects that no longer exist.
Until Sublime Text offers this feature there are a couple of manual ways you can remove projects.
Option 1: The quick way (Clear All):
If you're just looking for the ...
Git: what is a dangling commit/blob and where do they come from?
...ory, you may end up backing out of operations, and making other moves that cause intermediary blobs, and even some things that git does for you to help avoid loss of information.
Eventually (conditionally, according to the git gc man page) it will perform garbage collection and clean these things u...
What is the difference between javac and the Eclipse compiler?
...
Eclipse has implemented its own compiler called as Eclipse Compiler for Java (ECJ).
It is different from the javac, the compiler that is shipped with Sun JDK. One notable difference is that the Eclipse compiler lets you run code that didn't actually properly compil...
Clean up a fork and restart it from the upstream
...ection "What should I do if I’m in a bad situation?")
Be aware that you can lose changes done on the master branch (both locally, because of the reset --hard, and on the remote side, because of the push --force).
An alternative would be, if you want to preserve your commits on master, to replay ...
Is there documentation for the Rails column types?
...on DBMS)
Use for comments, blog posts, etc. General rule of thumb: if it's captured via textarea, use Text. For input using textfields, use string.
Integer:
Whole numbers
Float:
Decimal numbers stored with floating point precision
Precision is fixed, which can be problematic for some calculati...
What's the point of map in Haskell, when there is fmap?
...generalized to cover Functor in Haskell 1.3. I.e., in Haskell 1.3 fmap was called map. This change was then reverted in Haskell 1.4 and fmap was introduced. The reason for this change was pedagogical; when teaching Haskell to beginners the very general type of map made error messages more difficult ...
Repeater, ListView, DataList, DataGrid, GridView … Which to choose?
...he new Datalist :). Almost a hybrid of the datalist and gridview where you can use paging and build in Gridview like functionality, but have the freedom of design. One of the new controls in this family
Repeater - Very light weight. No built in functionality like Headers, Footers. Has the least over...