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How to do associative array/hashing in JavaScript
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var dictionary = {};
JavaScript allows you to add properties to objects by using the following syntax:
Object.yourProperty = value;
An alternate syntax for the same is:
Object["yourProperty"] = value;
If you can, also create key-to-value object maps with the following syntax:
var point = { x:3...
MySQL: Large VARCHAR vs. TEXT?
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TEXT and BLOB may by stored off the table with the table just having a pointer to the location of the actual storage. Where it is stored depends on lots of things like data size, columns size, row_format, and MySQL version.
VARCHAR is stored ...
How to change the background color of a UIButton while it's highlighted?
...called only when you tap the button, but not during the initial layout! So by default there is no colour until you touch the button. So to make it work you also need to explicitly call isHighlighted = false somewhere in the beginning (on inititialization for instance).
– Dmitri...
AttributeError: 'module' object has no attribute 'tests'
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Use:
./manage.py shell
followed by
import myapp.tests
to find the nature of the import error.
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Separation of business logic and data access in django
... latter is where you can find the business logic and entities as perceived by your end user, the former is where you actually store your data.
Furthermore, I've interpreted the 3rd part of your question as: how to notice failure to keep these models separate.
These are two very different concepts an...
Adding minutes to date time in PHP
... the form of P{y}Y{m1}M{d}DT{h}H{m2}M{s}S where the {*} parts are replaced by a number value indicating how long the duration is.
For example, P1Y2DT5S means 1 year, 2 days, and 5 seconds.
In the example above, we are providing PT5M (or 5 minutes) to the DateInterval constructor.
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The project cannot be built until the build path errors are resolved.
.../adding extra JARs as stated in other answers. Did not close Eclipse (ADT) by force, so the workspace was fine. Turns out a simple Eclipse restart did the trick.
– cassi.lup
Feb 28 '14 at 6:24
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
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Note: For future reference, the plotmatrix() function has been replaced by the ggpairs() function from the GGally package as @naught101 suggests in another response below to this question.
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A weighted version of random.choice
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By my testing, this is an order of magnitude slower than random.choices for individual calls. If you need a lot of random results, it's really important to pick them all at once by adjusting number_of_items_to_pick. If you do...
Displaying the build date
...estamp from the PE header embedded in the executable file -- some C# code (by Joe Spivey) for that from the comments to Jeff's article:
public static DateTime GetLinkerTime(this Assembly assembly, TimeZoneInfo target = null)
{
var filePath = assembly.Location;
const int c_PeHeaderOffset = 6...