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How to count occurrences of a column value efficiently in SQL?
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If you're using Oracle, then a feature called analytics will do the trick. It looks like this:
select id, age, count(*) over (partition by age) from students;
If you aren't using Oracle, then you'll need to join back to the counts:
select a.id, a.age, b.age_c...
Do Git tags only apply to the current branch?
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When calling just git tag <TAGNAME> without any additional parameters, Git will create a new tag from your current HEAD (i.e. the HEAD of your current branch). When adding additional commits into this branch, the branch HEAD...
Best way to create unique token in Rails?
...s might be a late response but in order to avoid using a loop you can also call the method recursively. It looks and feels slightly cleaner to me.
class ModelName < ActiveRecord::Base
before_create :generate_token
protected
def generate_token
self.token = SecureRandom.urlsafe_base64...
How do I unit test web api action method when it returns IHttpActionResult?
...lly the same. The test must know how the controller implemented the return call to test it in this way.
Instead, use the HttpResponseMessage object from the IHttpActionResult returned. This ensures the test can be consistent, even when the controller code may not be:
var testController = new Mixed...
Set Focus on EditText
...d set an OnFocusChangeListener for it. When it has lost focus, a method is called, which checks the value of the EditText with one in the database. If the return-value of the method is true, a toast is shown and the focus should get back on the EditText again. The focus should always get back on the...
What's the easiest way to call a function every 5 seconds in jQuery? [duplicate]
JQuery, how to call a function every 5 seconds.
7 Answers
7
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How to programmatically send a 404 response with Express/Node?
...ion for this on the response object. Just chain it in somewhere before you call send.
res.status(404) // HTTP status 404: NotFound
.send('Not found');
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LINQPad [extension] methods [closed]
...rs to programming questions.
The second purpose of HyperLinq is to dynamically build queries:
// Dynamically build simple expression:
new Hyperlinq (QueryLanguage.Expression, "123 * 234").Dump();
// Dynamically build query:
new Hyperlinq (QueryLanguage.Expression, @"from c in Customers
where c.N...
How to set data attributes in HTML elements
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I am glad it worked. The .data() call is special - not only does it retrieve HTML5 data attributes it also attempts to evaluate/parse the attributes. So with an attribute like data-myval='{"hello":"world"}' when retrieved via .data() will return an Object wh...
How to disable HTML button using JavaScript?
I’ve read that you can disable (make physically unclickable) an HTML button simply by appending disable to its tag, but not as an attribute, as follows:
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