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What is the difference between pluck and collect in Rails?
...asting memory and time. Because it will retrieve all the columns from user table in the database, allocates the memory for each attributes (including the attributes which you will never use)
NOTE: pluck does not return ActiveRecord_Relation of the user
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django models selecting single field
I have a table/models called Employees and I would like to get all rows of a single field as a queryset.
5 Answers
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When to use PNG or JPG in iPhone development?
...ded to use PNG's for any images that appear as part of the interface (in a table view, labels, etc).
As for displaying a full screen image such as a photograph you may still reap benefits with PNG's since they are non-lossy and the visual quality should be better than a JPG not to mention resource...
String representation of an Enum
...reating custom attributes and attaching them to your enums or using lookup tables to marry an enum value with a friendly string and best of all it's self managing and can be used on any Pascal Case string which is infinitely more reusable. Of course, it doesn't allow you to have a different friendly...
Is it possible to “decompile” a Windows .exe? Or at least view the Assembly?
... binary, then you can read the binary too, either manually with an op-code table in your hand (ick) or through a disassembler.
Disassemblers have some new tricks and all, but it's important to understand that a disassembler is ultimately a search and replace mechanism. Which is why any EULA which f...
How do I parse command line arguments in Java?
...tains a very similar list! What we need text is to turn these lists into a table, listing features and points of interest, so us poor users can make an informed choice.
– Tom Anderson
Feb 24 '12 at 13:23
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What's the best way to make a d3.js visualisation layout responsive?
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In the case that you are using a d3 wrapper like plottable.js, be aware that the easiest solution might be adding an event listener and then calling a redraw function (redraw in plottable.js). In the case of plottable.js this will work excellently (this approach is poorly docum...
Why can tuples contain mutable items?
If a tuple is immutable then why can it contain mutable items?
8 Answers
8
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Capture key press (or keydown) event on DIV element
...n't like it - the div focus border, set outline: none in the CSS.
See the table of keycodes for more keyCode possibilities.
All of the code assuming you use jQuery.
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Align inline-block DIVs to top of container element
...: beige;
vertical-align: top;
}
Vertical align affects inline or table-cell box's, and there are a large nubmer of different values for this property. Please see https://developer.mozilla.org/en-US/docs/Web/CSS/vertical-align for more details.
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