大约有 40,000 项符合查询结果(耗时:0.0230秒) [XML]

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How to change the pop-up position of the jQuery DatePicker control

...e bottom of the page and the DatePicker shifts up to account for it and totally covers the text box. If the user wants to type the date instead of pick it, they can't. I'd rather have it appear just after the text box so it doesn't matter how it adjusts vertically. ...
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Differences between C++ string == and compare()?

...har>,std::allocator<char> > (0D23EECh) 00D42A41 add esp,8 00D42A44 movzx edx,al 00D42A47 test edx,edx 00D42A49 je Algorithm::PerformanceTest::stringComparison_usingEqualOperator1+0C4h (0D42A54h) string::compare() if (str1.compare...
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How to avoid “Permission denied” when using pip with virtualenv

...solution here is to create the virtualenv without sudo to be able to work (esp. write) in it without sudo. share | improve this answer | follow | ...
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Detect when an HTML5 video finishes

... Why do you check if e exists? – Allan Stepps Aug 7 '13 at 0:12 3 @AllanStepp...
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Learning Python from Ruby; Differences and Similarities

... [x*x for x in values if x > 15] to get a new list of the squares of all values greater than 15. In Ruby, you'd have to write the following: values.select {|v| v > 15}.map {|v| v * v} The Ruby code doesn't feel as compact. It's also not as efficient since it first converts the values a...
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Why are these constructs using pre and post-increment undefined behavior?

... concept of undefined behavior, i.e. some language constructs are syntactically valid but you can't predict the behavior when the code is run. As far as I know, the standard doesn't explicitly say why the concept of undefined behavior exists. In my mind, it's simply because the language designers w...
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What is the instanceof operator in JavaScript?

...ce p inherits from Person.prototype. Per the OP's request I've added a small example with some sample code and an explanation. When you declare a variable you give it a specific type. For instance: int i; float f; Customer c; The above show you some variables, namely i, f, and c. The type...
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A cron job for rails: best practices?

... I'm using the rake approach (as supported by heroku) With a file called lib/tasks/cron.rake .. task :cron => :environment do puts "Pulling new requests..." EdiListener.process_new_messages puts "done." end To execute from the command line, this is just "rake cron". This command ...
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Swift make method parameter mutable?

...ment for var args than using inout which may have unintended side-effects, esp. if the var was a pointer. – Echelon Jun 23 '17 at 17:05 add a comment  |  ...
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What is the fastest integer division supporting division by zero no matter what the result is?

...x, int y) { y += y == 0; return x/y; } The compiler basically recognizes that it can use a condition flag of the test in the addition. As per request the assembly: .globl f .type f, @function f: pushl %ebp xorl %eax, %eax movl %esp, %ebp movl 12(%...