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Fix warning “Capturing [an object] strongly in this block is likely to lead to a retain cycle” in AR
...onary = [[CJSONDeserializer deserializer] deserialize:request.responseData error:nil];
request = nil;
// ....
}];
Update: got it to work with the keyword '_weak' instead of '_block', and using a temporary variable:
ASIHTTPRequest *_request = [[ASIHTTPRequest alloc] initWithURL:...
__weak...
How to use a custom comparison function in Python 3?
..._rows = sorted(rows, key=itemgetter('name'), cmp=locale.strxfrm) gives TypeError: 'cmp' is an invalid keyword argument for this function, in Python 3.2 :(
– bitek
Dec 12 '14 at 8:07
...
How do I set up a simple delegate to communicate between two view controllers?
...unately, I'm getting a "Cannot find protocol declaration for 'MyProtocol'" error when I try to compile. It's as you described, though: the spawned viewcontroller has the procotol definition in its .h file and invokes the protocol method in its .m file. The hosting viewcontroller has <MyProtocol...
How to do constructor chaining in C#
...oding default values (0 and "") in more than one place (less chance for an error). For example: public Foo(int id) : this () { this.id = id; }? Alternatively, I was also considering: public Foo(int id) : this ("") { this.id = id; }. Just looking for the best logical way to chain them, appreciate any...
What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...rameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.
The permit method returns a copy of the parameters object, returning only the permitted keys and values. When creating a new Acti...
编程基础与事件状态 05：用过程集中刷新界面 · App Inventor 2 中文网
... 编程基础与事件状态 05：用过程集中刷新界面 课程首页 · 全部知识课程 · 返回专题主页
这课解决什么
先预测，再运行
开始实战
新增或调整的组件...
Counting Line Numbers in Eclipse [closed]
I have a Java project in Eclipse with ~10 packages and ~10 class files per package. Is there a way to determine total lines of code for the whole project from within Eclipse? I am familiar with other tools (e.g., Code Analyzer, wc, etc.) but I want to know if there is a way to do this within Eclip...
TypeError: method() takes 1 positional argument but 2 were given
...
Something else to consider when this type of error is encountered:
I was running into this error message and found this post helpful. Turns out in my case I had overridden an __init__() where there was object inheritance.
The inherited example is rather long, so I'll ...
String formatting: % vs. .format vs. string literal
...ere %s" % name
yet, if name happens to be (1, 2, 3), it will throw a TypeError. To guarantee that it always prints, you'd need to do
"hi there %s" % (name,) # supply the single argument as a single-item tuple
which is just ugly. .format doesn't have those issues. Also in the second example yo...