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What are the Dangers of Method Swizzling in Objective-C?
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Apple is not the only provider of base classes that can be modified via siwzzling. Your answer ought to be edited to include everyone.
– A.R.
Mar 17 '11 at 13:56
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Short form for Java if statement
... a;
}
else {
max = b;
}
Setting a single variable to one of two states based on a single condition is such a common use of if-else that a shortcut has been devised for it, the conditional operator, ?:. Using the conditional operator you can rewrite the above example in a single line like this:
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How to include (source) R script in other scripts
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Here is a function I wrote. It wraps the base::source function to store a list of sourced files in a global environment list named sourced. It will only re-source a file if you provide a .force=TRUE argument to the call to source. Its argument signature is otherwise...
Web安全测试之XSS - 更多技术 - 清泛网 - 专注C/C++及内核技术
...具, 点击Toolbar上的"TextWizard" 按钮
XSS 攻击场景
1. Dom-Based XSS 漏洞 攻击过程如下
Tom 发现了Victim.com中的一个页面有XSS漏洞，
例如: http://victim.com/search.asp?term=apple
服务器中Search.asp 页面的代码大概如下
<html>
<title></titl...
Expand/collapse section in UITableView in iOS
...sing the UITableView or the headers that are already there will be a pain. Based on the way they work now, I am not sure you can easily get actions out of them. You could set up a cell to LOOK like a header, and setup the tableView:didSelectRowAtIndexPath to manually expand or collapse the section i...
Why is the order in dictionaries and sets arbitrary?
...ash values are assigned to slots in a dynamic table (it can grow or shrink based on needs). And that mapping process can lead to collisions, meaning that a key will have to be slotted in a next slot based on what is already there.
Listing the contents loops over the slots, and so keys are listed in...
Entity framework linq query Include() multiple children entities
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Years later, I would not recommend the string-based includes, because they aren't runtime safe. If the navigation property name ever changes or is misspelled, it will break. Strongly suggest using the typed include instead.
– Jeff Putz
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Can enums be subclassed to add new elements?
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The reason I want to extend is because I'd like to have a base class called e.g. IntEnum, that looks like this: stackoverflow.com/questions/1681976/enum-with-int-value-in-java/…. Then all my enums could extend it...in this case just benefitting from inheritance and thus I wouldn'...
Design Patterns: Factory vs Factory method vs Abstract Factory
...family of objects that need to be of "the same kind", and have some common base classes. Here's a vaguely fruit-related example. The use case here is that we want to make sure that we don't accidentally use an OrangePicker on an Apple. As long at we get our Fruit and Picker from the same factory, th...
Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate]
... to an int?. Note that another possibility would be to box the int 10 to a base class or interface of System.Int32. As an example GetBoolValue() ? (IFormattable)10 : null // #1B or GetBoolValue() ? 10 : (IFormattable)null // #2B will be OK. This possibility may be a reason why they don't make the nu...