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Mongodb Explain for Aggregation framework
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Optimizing pipelines
In general, you can optimize aggregation pipelines by:
Starting a pipeline with a $match stage to restrict processing to relevant documents.
Ensuring the initial $match / $sort stages are supported by an efficient index.
Filtering data early using $match, $limit , and $skip...
Using CSS :before and :after pseudo-elements with inline CSS?
...ts and pseudo-classes in this aspect is that properties that are inherited by default will be inherited by :before and :after from the generating element, whereas pseudo-class styles just don't apply at all. In your case, for example, if you place text-align: justify in an inline style attribute for...
ASP.NET MVC partial views: input name prefixes
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You can extend Html helper class by this :
using System.Web.Mvc.Html
public static MvcHtmlString PartialFor<TModel, TProperty>(this HtmlHelper<TModel> helper, System.Linq.Expressions.Expression<Func<TModel, TProperty>> expression,...
How to get existing fragments when using FragmentPagerAdapter
.... I have implemented FragmentPagerAdapter just as same as it is provided by the Android sample project Support4Demos .
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Javascript : natural sort of alphanumerical strings
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This is now possible in modern browsers using localeCompare. By passing the numeric: true option, it will smartly recognize numbers. You can do case-insensitive using sensitivity: 'base'. Tested in Chrome, Firefox, and IE11.
Here's an example. It returns 1, meaning 10 goes after 2:
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How does the “this” keyword work?
...s set to the global object, window (§10.4.1.1).
2. Entering eval code
…by a direct call to eval()
ThisBinding is left unchanged; it is the same value as the ThisBinding of the calling execution context (§10.4.2 (2)(a)).
…if not by a direct call to eval()
ThisBinding is set to the global obje...
delete_all vs destroy_all?
... / destroy_all: The associated objects are destroyed alongside this object by calling their destroy method
delete / delete_all: All associated objects are destroyed immediately without calling their :destroy method
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Unique Key constraints for multiple columns in Entity Framework
... @JJS - I got it to work where one of the properties was a foreign key.. by any chance is your key a varchar or nvarchar? There is a limit to the length of which can be used as a unique key.. stackoverflow.com/questions/2863993/…
– Dave Lawrence
Dec 14 '15 ...
Best practice for embedding arbitrary JSON in the DOM?
...er for the purpose of making it safe to embed. PHP's json_encode does this by default.
– Timo Tijhof
Feb 26 '15 at 13:06
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CSS Pseudo-classes with inline styles
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Another point for inline styles is lowering render times by using a virtual DOM. A CSS will need to scan the entire document for changes and applying its styles. This is eliminated by inline styles.
– Frederik Krautwald
May 22 '15 at 22:04
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