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Plot two graphs in same plot in R
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@uvts_cvs Yes, it preserves the original graph in toto.
– Sam
Sep 23 '12 at 13:02
10
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How can I convert an image into Base64 string using JavaScript?
...we extract 2 or more canvas as a single PNG?
– techie_28
Jul 11 '16 at 11:48
162
Can you please m...
Array initializing in Scala
...ction, you can write
val list = List(1,2,3,4,5)
val arr = Array[Int](list:_*)
println(arr.mkString)
But usually the toArray method is more handy:
val list = List(1,2,3,4,5)
val arr = list.toArray
println(arr.mkString)
s...
Secret copy to clipboard JavaScript function in Chrome and Firefox?
...learConsoleMessages();
}
> copy
function (object)
{
if (injectedScript._type(object) === "node")
object = object.outerHTML;
InjectedScriptHost.copyText(object);
}
While the Firebug source also defines a list of functions:
this.clear = function() // no web page interaction
{
Firebug.Cons...
validation custom message for rails 3
...ant to remove the field title from the message you should use this on your _form.htmk.erb view:
As you can see inside this view:
<ul>
<% @article.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
Replace it by:
<ul>
...
How to convert byte array to Bitmap
...itmap bmp = Bitmap.createBitmap(imageWidth, imageHeight, Bitmap.Config.ARGB_8888);
ByteBuffer buffer = ByteBuffer.wrap(bitmapdata);
bmp.copyPixelsFromBuffer(buffer);
Check https://developer.android.com/reference/android/graphics/Bitmap.Config.html for different color options
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Convert NSNumber to int in Objective-C
...r interfacing with cross-platform libs. And even then something like uint32_t would be better to use.
– Max Seelemann
Jan 11 '15 at 13:06
1
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Why does Python code run faster in a function?
...e names are assigned to indexes. This is possible because you can't dynamically add local variables to a function. Then retrieving a local variable is literally a pointer lookup into the list and a refcount increase on the PyObject which is trivial.
Contrast this to a global lookup (LOAD_GLOBAL), w...
How does interfaces with construct signatures work?
...]; Now, how would I go about creating instances from those? say in a loop: _.each(objs, (x) => makeObj(x)? This will throw an error since x is of type ComesFromString and doesn't have a constructor.
– jmlopez
Aug 20 '16 at 17:40
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Rails hidden field undefined method 'merge' error
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You should do:
<%= f.hidden_field :service, :value => "test" %>
hidden_field expects a hash as a second argument
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