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Underscore vs Double underscore with variables and methods [duplicate]
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Explanation:
People coming from a C++/Java background are especially prone to
overusing/misusing this "feature". But __private names don't work the
same way as in Java or C++. They just trigger a name mangling whose
purpose is to prevent accidental namespace collisions in subclasses...
How do I convert array of Objects into one Object in JavaScript?
... item.value, obj) ,{});
Here we benefit from comma operator, it evaluates all expression before comma and returns a last one(after last comma). So we don't copy obj each time, rather assigning new property to it.
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dealloc in Swift
..., namely to remove an NSNotificationCenter notification. Implementing dealloc results in a Swift compiler error:
5 Answ...
List attributes of an object
...ict__
Then you can test what type is with type() or if is a method with callable().
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Lodash - difference between .extend() / .assign() and .merge()
...d try to map child object properties from source to destination. So essentially we merge object hierarchy from source to destination. While for extend/assign, it's simple one level copy of properties from source to destination.
Here's simple JSBin that would make this crystal clear:
http://jsbin.co...
Proper way to declare custom exceptions in modern Python?
...tionError(Exception):
def __init__(self, message, errors):
# Call the base class constructor with the parameters it needs
super(ValidationError, self).__init__(message)
# Now for your custom code...
self.errors = errors
That way you could pass dict of error me...
MFC CListCtrl使用方法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...风格为report相关类及处理函数MFC：CListCtrl类SDK：以 ListView_开头的一些宏。如 ListView_InsertCol
以下未经说明，listctrl默认view 风格为report
相关类及处理函数
MFC：CListCtrl类
SDK：以 “ListView_”开头的一些宏。如 ListView_InsertColumn
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UIButton: set image for selected-highlighted state
....highlighted])
To set the background image we can use setBackgroundImage(_:for:)
Swift 2.x
// Normal
button.setImage(UIImage(named: "image1"), forState: .Normal)
// Highlighted
button.setImage(UIImage(named: "image2"), forState: .Highlighted)
// Selected
button.setImage(UIImage(named: "image3"...
How to set the UITableView Section title programmatically (iPhone/iPad)?
... answered May 8 '12 at 20:27
AlladinianAlladinian
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What is an optional value in Swift?
...g and writing code more fluent. Unfortunately this obscures the way it actually works. I'll go through some of the tricks later.
Note: I'll be talking about optional variables a lot, but it's fine to create optional constants too. I mark all variables with their type to make it easier to understand ...