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ActiveRecord: List columns in table from console
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This will list the column_names from a table
Model.column_names
e.g. User.column_names
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How to generate and validate a software license key?
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Caveat: you can't prevent users from pirating, but only make it easier for honest users to do the right thing.
Assuming you don't want to do a special build for each user, then:
Generate yourself a secret key for the product
Take the user's name
Concaten...
Deleting all pending tasks in celery / rabbitmq
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From the docs:
$ celery -A proj purge
or
from proj.celery import app
app.control.purge()
(EDIT: Updated with current method.)
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How to Deserialize XML document
...of the ReadToEnd() call and adding of a root node. But better use the code from erymski which solves the question (parse the given xml)
– Flamefire
Oct 24 '14 at 23:06
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How to refresh app upon shaking the device?
...ensorManager mSensorManager;
private float mAccel; // acceleration apart from gravity
private float mAccelCurrent; // current acceleration including gravity
private float mAccelLast; // last acceleration including gravity
private final SensorEventListener mSensorListener = new SensorEventLi...
AngularJS - placeholder for empty result from filter
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Taken from this official document that's how they do it:
ng-repeat="friend in friends | filter:q as results"
Then use the results as an array
<li class="animate-repeat" ng-if="results.length == 0">
<strong>No resu...
How to convert numbers between hexadecimal and decimal
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To convert from decimal to hex do...
string hexValue = decValue.ToString("X");
To convert from hex to decimal do either...
int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
or
int decValue = Conve...
How do I make and use a Queue in Objective-C?
...ay (QueueAdditions)
// Queues are first-in-first-out, so we remove objects from the head
- (id) dequeue {
// if ([self count] == 0) return nil; // to avoid raising exception (Quinn)
id headObject = [self objectAtIndex:0];
if (headObject != nil) {
[[headObject retain] autorelease]...
Bootstrap Modal immediately disappearing
.... Depending on the platform you are using, the modal code could be loaded from a number a sources. Some of the common ones are:
bootstrap.js (the full BootStrap JS suite)
bootstrap.min.js (same as above, just minified)
bootstrap-modal.js (the standalone plugin)
a dependency loader, e.g., require...
Why do Lua arrays(tables) start at 1 instead of 0?
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Lua is descended from Sol, a language designed for petroleum engineers with no formal training in computer programming. People not trained in computing think it is damned weird to start counting at zero. By adopting 1-based array and string...