大约有 48,000 项符合查询结果(耗时:0.0698秒) [XML]

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How to define an enumerated type (enum) in C?

... Declaring an enum variable is done like this: enum strategy {RANDOM, IMMEDIATE, SEARCH}; enum strategy my_strategy = IMMEDIATE; However, you can use a typedef to shorten the variable declarations, like so: typedef enum {RANDOM, IMMEDIATE, SEARCH} strategy; strategy my_strategy = IMME...
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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...
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How to check if an option is selected?

...Query!, but use it when you need it, not when it give nothing but overhead and more code. – gdoron is supporting Monica Apr 18 '12 at 16:31 ...
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Should I avoid 'async void' event handlers?

I know it is considered generally a bad idea to use fire-and-forget async void methods to start tasks, because there is no track of the pending task and it is tricky to handle exceptions which might be thrown inside such a method. ...
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Difference between getAttribute() and getParameter()

What is the difference between getAttribute() and getParameter() methods within HttpServletRequest class? 10 Answers ...
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At runtime, find all classes in a Java application that extend a base class

...ns. I mistakenly figured this would be as easy as it is in the .Net world and this answer has saved me a lot of time. – akmad Oct 1 '12 at 19:55 1 ...
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How to set environment variables from within package.json

... variables from within package.json to be used with npm start like commands? 14 Answers ...
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Case conventions on element names?

... Most XML standards originating from the W3C tend to use lower case with hyphens. There is a philosophical distinction between seeing XML as a format for platform neutral documents, which W3C standards try to encourage, and languages su...
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What is the difference between lock and Mutex?

What is the difference between lock and Mutex? Why can't they be used interchangeably? 7 Answers ...
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bootstrap popover not showing on top of all elements

I'm working on a bootstrap site and after updating to bootstrap 2.2 from 2.0 everything worked except the popover. 15 Answe...