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Rails 4 multiple image or file upload using carrierwave
...ass="field">
<%= f.label :title %><br>
<%= f.text_field :title %>
</div>
<%= f.fields_for :post_attachments do |p| %>
<div class="field">
<%= p.label :avatar %><br>
<%= p.file_field :avatar, :multiple => tru...
Print all day-dates between two dates [duplicate]
For example:
5 Answers
5
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How does variable assignment work in JavaScript?
So I was playing around the other day just to see exactly how mass assignment works in JavaScript.
7 Answers
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Limit labels number on Chart.js line chart
...
Try adding the options.scales.xAxes.ticks.maxTicksLimit option:
xAxes: [{
type: 'time',
ticks: {
autoSkip: true,
maxTicksLimit: 20
}
}]
share
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Java: how to initialize String[]?
...emory storage for the String elements before you can start setting the index.
If you only declare the array (as you did) there is no memory allocated for the String elements, but only a reference handle to errorSoon, and will throw an error when you try to initialize a variable at any index.
As a ...
What's the difference between “Request Payload” vs “Form Data” as seen in Chrome dev tools Network t
...ation/json
{ "foo" : "bar", "name" : "John" }
If you submit this per AJAX the browser simply shows you what it is submitting as payload body. That’s all it can do because it has no idea where the data is coming from.
If you submit a HTML-Form with method="POST" and Content-Type: application/x-...
Big O, how do you calculate/approximate it?
...
I'll do my best to explain it here on simple terms, but be warned that this topic takes my students a couple of months to finally grasp. You can find more information on the Chapter 2 of the Data Structures and Algorithms in Java book.
There ...
SQL Logic Operator Precedence: And and Or
...nd b
is not the same as
Where a1 Or a2 And b,
because that would be Executed as
Where a1 Or (a2 And b)
and what you want, to make them the same, is the following (using parentheses to override rules of precedence):
Where (a1 Or a2) And b
Here's an example to illustrate:
Declare @x tin...
Difference between staticmethod and classmethod
...
Maybe a bit of example code will help: Notice the difference in the call signatures of foo, class_foo and static_foo:
class A(object):
def foo(self, x):
print "executing foo(%s, %s)" % (self, x)
@classmethod
def class_f...
Difference between Pragma and Cache-Control headers?
...m caching the response is a confusing note for readers. It can also have max-age which doesn't prevent caching. It just sets an expiration date for it...
– Honey
Oct 23 '18 at 17:47
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