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Does every Core Data Relationship have to have an Inverse?
Let's say I have two Entity classes: SocialApp and SocialAppType
8 Answers
8
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Difference between rake db:migrate db:reset and db:schema:load
...he database). db:schema:load is used when you setup a new instance of your app.
I hope that helps.
UPDATE for rails 3.2.12:
I just checked the source and the dependencies are like this now:
db:create creates the database for the current env
db:create:all creates the databases for all envs
db:...
融资千万美元后的足记要如何应对“爆款后遗症”？ - 资讯 - 清泛网 - 专注C...
...自high。普通用户是不会关心这个的。”
一夜走红的爆款APP，比如脸萌和足记，经常会被询问他们如何对抗“爆款后遗症”。在脸萌持续静默的时候，足记之前也在外界没有多少响动。但杨柳认为这几个月还是做了不少重要的事...
How do I avoid capturing self in blocks when implementing an API?
I have a working app and I'm working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing self strongly in a block leading to a retain cycle. I've made a simple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "corre...
Android java.lang.VerifyError?
In my Android app, I always get VerifyErrors! And I cannot figure out why. Whenever I include a external JAR, I always get VerifyErrors when I try to launch my app (except for once, when I included Apache Log4j.)
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python location on mac osx
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[GCC 4.2.1 (Apple Inc. build 5646)] is the version of GCC that the Python(s) were built with, not the version of Python itself. That information should be on the previous line. For example:
# Apple-supplied Python 2.6 in OS X 10.6
$ /...
oh-my-zsh slow, but only for certain Git repo
...e the vendor folder makes things slow, like the rake folder does for rails apps? zsh is fast now, and I do not need the GIT zsh plugin anyway. Thanks!
– mblaettermann
Dec 31 '15 at 22:01
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How do ACID and database transactions work?
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ACID is a set of properties that you would like to apply when modifying a database.
Atomicity
Consistency
Isolation
Durability
A transaction is a set of related changes which is used to achieve some of the ACID properties. Transactions are tools to achieve the ACID proper...
How to get RelativeLayout working with merge and include?
...source code shows that id, visibility and layout_* tags overriding are not applied when the root element is a merge tag, unfortunately. As you can't have a View as the xml root, we must have an extra ViewGroup there...
– Rafael Nobre
Jul 24 '13 at 13:20
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Expand Python Search Path to Other Source
... directories to search for imported modules.
In your program, use sys.path.append('/path/to/search') to add the names of directories you want Python to search for imported modules. sys.path is just the list of directories Python searches every time it gets asked to import a module, and you can alter...