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How to make return key on iPhone make keyboard disappear?
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First you need to conform to the UITextFieldDelegate Protocol in your View/ViewController's header file like this:
@interface YourViewController : UIViewController <UITextFieldDelegate>
Then in your .m file you need to implement the foll...
HTML5: Slider with two inputs possible?
Is it possible to make a HTML5 slider with two input values, for example to select a price range? If so, how can it be done?
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How to prevent a jQuery Ajax request from caching in Internet Explorer?
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You can disable caching globally using $.ajaxSetup(), for example:
$.ajaxSetup({ cache: false });
This appends a timestamp to the querystring when making the request. To turn cache off for a particular $.ajax() call, set cache: false on it locally, like this:
$.ajax({
cac...
How do I deep copy a DateTime object?
... I used a new DateTime in the example to demonstrate the point, but for now assume DateTime is returned from some opaque API that I can't just call over again. For example, I have a function that handles orders that returns a DateTime which is when the customer can next place an order. Callin...
Passing command line arguments from Maven as properties in pom.xml
...ible to pass arguments from command line to properties in pom.xml file ?
for example I run mvn ... argument
5 Answers
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How to determine equality for two JavaScript objects?
...ell be attributes which are not to be considered part of the object value. For example,
function MyClass(a, b)
{
var c;
this.getCLazy = function() {
if (c === undefined) c = a * b // imagine * is really expensive
return c;
}
}
In this above case, c is not real...
How can I convert immutable.Map to mutable.Map in Scala?
...orts, but bear in mind that sacrificing immutability is very non-idiomatic for Scala, not exactly the sort of thing I'd enourage by making it look even easier... Out of curiosity, how else could you propose doing it more cleanly, if not via a copy?
– Kevin Wright
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Is there any overhead to declaring a variable within a loop? (C++)
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Stack space for local variables is usually allocated in function scope. So no stack pointer adjustment happens inside the loop, just assigning 4 to var. Therefore these two snippets have the same overhead.
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服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...经常用到下面的命令：
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
它会显示例如下面的信息：
TIME_WAIT 814
CLOSE_WAIT 1
FIN_WAIT1 1
ESTABLISHED 634
SYN_RECV 2
LAST_ACK 1
常用的三个状态是：ESTABLISHED 表示正在通信，TIME_WAIT...
Why JSF calls getters multiple times
...f the EL expression at all as it may return different values on each call (for example, when it's dependent on the currently iterated datatable row).
Evaluating an EL expression and invoking a getter method is a very cheap operation, so you should generally not worry about this at all. However, th...