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What is thread safe or non-thread safe in PHP?
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Needed background on concurrency approaches:
Different web servers implement different techniques for handling incoming HTTP requests in parallel. A pretty popular technique is using threads -- that is, the web server will create/dedicate a single thread for each incoming request. The Apache HTTP...
Stateless and Stateful Enterprise Java Beans
...ion beans. If stateless session beans do not retain their state in between method calls, why is my program acting the way it is?
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Redirect to Action in another controller
...the other, lets call it Controller B , is not in any Area (I guess that means it's in the default Area ?). Controller B has an action method called Login . I have an action method in Controller A , which has this line
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Best way to remove from NSMutableArray while iterating?
...riteria, what's the best way to do this without restarting the loop each time I remove an object?
20 Answers
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ETag vs Header Expires
...e inodes as part of the calculation but then you'd want to make sure the timestamps on the files are exactly the same, to ensure the same ETag gets generated for all servers.
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WPF: ItemsControl with scrollbar (ScrollViewer)
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@Ristogod If you host the ScrollViewer inside something that lets its content grow as much as needed, for example a StackPanel, scrolling will not work. What's the parent container? Try setting a fixed height on either the ScrollViewer or the parent, does that help?
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Calling startActivity() from outside of an Activity?
... yes this works. but if you want to start multiple instances of the same Activity this does not work. Since the FLAG_ACTIVITY_NEW_TASK will resume the same existing Activity
– Ovidiu Latcu
Sep 30 '11 at 13:16
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What does a \ (backslash) do in PHP (5.3+)?
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\ (backslash) is the namespace separator in PHP 5.3.
A \ before the beginning of a function represents the Global Namespace.
Putting it there will ensure that the function called is from the global namespace, even if there is a function by the ...
jQuery .live() vs .on() method for adding a click event after loading dynamic html
I am using jQuery v.1.7.1 where the .live() method is apparently deprecated.
7 Answers
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Group by multiple columns in dplyr, using string vector input
...nce this question was posted, dplyr added scoped versions of group_by (documentation here). This lets you use the same functions you would use with select, like so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LET...