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Build vs new in Rails 3
...rm.client.new is creating a new Client object from the clients collection, and so it can automatically set the firm_id to some_firm.id, whereas the docs are calling Client.new which has no knowledge of any Firm's id at all, so it needs the firm_id passed to it.
The only difference between some_firm...
how to set “camera position” for 3d plots using python/matplotlib?
I'm learning how to use mplot3d to produce nice plots of 3d data and I'm pretty happy so far. What I am trying to do at the moment is a little animation of a rotating surface. For that purpose, I need to set a camera position for the 3D projection. I guess this must be possible since a surface can b...
Call by name vs call by value in Scala, clarification needed
As I understand it, in Scala, a function may be called either
16 Answers
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First-time database design: am I overengineering? [closed]
I'm a first year CS student and I work part time for my dad's small business. I don't have any experience in real world application development. I have written scripts in Python, some coursework in C, but nothing like this.
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What is the fastest way to compute sin and cos together?
I would like to compute both the sine and co-sine of a value together (for example to create a rotation matrix). Of course I could compute them separately one after another like a = cos(x); b = sin(x); , but I wonder if there is a faster way when needing both values.
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Identifying and removing null characters in UNIX
...nulls
If you are wondering if input redirection in the middle of the command arguments works, it does. Most shells will recognize and deal with I/O redirection (<, >, …) anywhere in the command line, actually.
shar...
Fast and Lean PDF Viewer for iPhone / iPad / iOS - tips and hints?
...ively the same approach except :
I cache the generated image on the disk and always generate two to three images in advance in a separate thread.
I don't overlay with a UIImage but instead draw the image in the layer when zooming is 1. Those tiles will be released automatically when memory warnin...
How to test an SQL Update statement before running it?
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In addition to using a transaction as Imad has said (which should be mandatory anyway) you can also do a sanity check which rows are affected by running a select using the same WHERE clause as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
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Force DOM redraw/refresh on Chrome/Mac
...e DOM inspector is often enough to get it to realize the error of its ways and redraw correctly, so it's provably the case that the markup is good. This happens frequently (and predictably) enough in a project I'm working on that I've put code in place to force a redraw in certain circumstances.
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How to delete a module in Android Studio
Is there a way to delete a module within Android Studio?
When I right click on a module I can't find an option for deletion, is it elsewhere?
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