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Html helper for
Is there a HTMLHelper for file upload? Specifically, I am looking for a replace of
8 Answers
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How to get process ID of background process?
...mmand from $! rather than the tail command if that's what you were looking for. You will need to use jobs or ps or the likes in this instance.
– John Rix
Oct 14 '14 at 13:52
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When to use enumerateObjectsUsingBlock vs. for
...er pattern you want to use and comes more naturally in the context.
While for(... in ...) is quite convenient and syntactically brief, enumerateObjectsUsingBlock: has a number of features that may or may not prove interesting:
enumerateObjectsUsingBlock: will be as fast or faster than fast enumer...
Warning: Null value is eliminated by an aggregate or other SET operation in Aqua Data Studio
...
You would mostly be using COUNT to summarize over a UID. Therefore
COUNT([uid]) will produce the warning:
Warning: Null value is eliminated by an aggregate or other SET operation.
whilst being used with a left join, where the counted object does not exist.
Using COUNT(*) in this...
Create objective-c class instance by name?
...o create a variable, then the compiler will verify that the class exists.
For example, in your .h:
@property Class NameOfClass;
and then in your .m:
id object = [[NameOfClass alloc] init];
If you mistyped the class name or if it doesn't exist, you'll get an error at compile time. Also I think...
SQL keys, MUL vs PRI vs UNI
...ue index. You can issue
show create table <table>;
To see more information about the table structure.
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What's the best way to set a single pixel in an HTML5 canvas?
The HTML5 Canvas has no method for explicitly setting a single pixel.
14 Answers
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If REST applications are supposed to be stateless, how do you manage sessions?
...ia, REST itself is defined to be Representational State Transfer . I therefore don't understand all this stateless gobbledeygook that everyone keeps spewing.
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git: fatal: Could not read from remote repository
...ystem as part of your remote's URL. Put the username, followed by an @, before the remote hostname.
git remote set-url website abc@***.com:path/to/repo
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Delete all data in SQL Server database
...from all tables of my database? Can I do it with one SQL command or I need for one SQL command per one table?
10 Answers
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