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Need a simple explanation of the inject method
...alues in the array, or 10.
Here's another simple example to create a hash from an array of objects, keyed by their string representation:
[1,"a",Object.new,:hi].inject({}) do |hash, item|
hash[item.to_s] = item
hash
end
In this case, we are defaulting our accumulator to an empty hash, then p...
Why both no-cache and no-store should be used in HTTP response?
...ore such responses as part of their normal operation
But this is omitted from the newer RFC 7234 HTTP spec in potentially an attempt to make no-store stronger, see:
http://tools.ietf.org/html/rfc7234#section-5.2.1.5
share...
Zero-based month numbering [closed]
...
The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 and would always be up to the...
How to write DataFrame to postgres table?
...
Starting from pandas 0.14 (released end of May 2014), postgresql is supported. The sql module now uses sqlalchemy to support different database flavors. You can pass a sqlalchemy engine for a postgresql database (see docs). E.g.:
fro...
Get querystring from URL using jQuery [duplicate]
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From: http://jquery-howto.blogspot.com/2009/09/get-url-parameters-values-with-jquery.html
This is what you need :)
The following code will return a JavaScript Object containing the URL parameters:
// Read a page's GET URL ...
Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...
Nate C was close, but not quite.
From the docs:
You can evaluate a QuerySet in the following ways:
Iteration. A QuerySet is iterable, and it executes its database query the first time you iterate over it. For example, this will print the headline...
Remove an item from a dictionary when its key is unknown
What is the best way to remove an item from a dictionary by value, i.e. when the item's key is unknown? Here's a simple approach:
...
When to use PNG or JPG in iPhone development?
... extra CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding algor...
A generic error occurred in GDI+, JPEG Image to MemoryStream
... new MemoryStream())
{
dst.Save(m, format);
var img = Image.FromStream(m);
//TEST
img.Save("C:\\test.jpg");
var bytes = PhotoEditor.ConvertImageToByteArray(img);
return img;
}
It appears that the memory stream that the object was created on has to be ...
Xcode Simulator: how to remove older unneeded devices?
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Did you tried to just delete the 4.3 SDK from within the Xcode Package?
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs
please also delete the corresponding .dmg file in
~/Library/Caches/com.apple.dt.Xcode/Downl...