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Rails 4 multiple image or file upload using carrierwave
...ow can I upload multiple images from a file selection window using Rails 4 and CarrierWave? I have a post_controller and post_attachments model. How can I do this?
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HTML5 Email Validation
...your email">
<input type="submit" value="Submit">
</form>
And when the user press submit, it automatically shows an error message like:
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Sorting rows in a data table
...taView that you create from your original DataTable. Apply whatever sorts and/or filters you want on the DataView and then create a new DataTable from the DataView using the DataView.ToTable method:
DataView dv = ft.DefaultView;
dv.Sort = "occr desc";
DataTable sortedDT = dv.ToTable();
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How to prevent gcc optimizing some statements in C?
...ile type qualifier instructs the compiler to be strict about memory stores and loads. One purpose of volatile is to let the compiler know that the memory access has side effects, and therefore must be preserved. In this case, the store has the side effect of causing a page fault, and you want the ...
I want to get the type of a variable at runtime
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So, strictly speaking, the "type of a variable" is always present, and can be passed around as a type parameter. For example:
val x = 5
def f[T](v: T) = v
f(x) // T is Int, the type of x
But depending on what you want to do, that won't help you. For instance, may want not to know what is ...
How do you manually execute SQL commands in Ruby On Rails using NuoDB
I'm trying to manually execute SQL commands so I can access procedures in NuoDB.
4 Answers
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Add & delete view from Layout
...fault to 1 when i get back to this activity again.
– AndroidNewBee
Nov 17 '15 at 12:40
Thanks a Lot for gave this answ...
How to call any method asynchronously in c#
...ibrary in .Net 4. It's much, much nicer than using BeginInvoke/EndInvoke, and gives a clean way to fire-and-forget for async jobs:
using System.Threading.Tasks;
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void Foo(){}
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new Task(Foo).Start();
If you have methods to call that take parameters, you can use a lambda to simplify the call...
How to get last key in an array?
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A solution would be to use a combination of end and key (quoting) :
end() advances array 's internal pointer to the last element, and returns its value.
key() returns the index element of the current array position.
So, a portion of code such as this one should do th...
Skip certain tables with mysqldump
Is there a way to restrict certain tables from the mysqldump command?
10 Answers
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