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difference between scope and namespace of ruby-on-rails 3 routing
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by paths u mean the helper names right? i don't understand the scope's functionality. what does it (:module => "admin") do if nothing change?
– never_had_a_name
Jun 13 '10 at 6:53
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What does the “|” (single pipe) do in JavaScript?
Why does 0.5 | 0 return zero, but any integer (including negative) returns the input integer? What does the single pipe ("|") do?
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How to find the last field using 'cut'
Without using sed or awk , only cut , how do I get the last field when the number of fields are unknown or change with every line?
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Rails 3.1: Engine vs. Mountable App
...pecified as:
# my_engine/config/routes.rb
Rails.application.routes.draw do
# whatever
end
No namespacing of models, controllers, etc. These are immediately
accessible to the parent application.
Mountable Engine
The engine's namespace is isolated by default:
# my_engine/lib/my_engine/...
Html.Partial vs Html.RenderPartial & Html.Action vs Html.RenderAction
...utput of Html.Partial in a variable or return it from a method, one cannot do this with Html.RenderPartial.
The result will be written to the Response stream during execution/evaluation.
This also applies to Html.Action and Html.RenderAction.
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jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
...cope, rather than the default compile scope, in your Maven pom." How can I do that
– dreambigcoder
Mar 24 '13 at 17:33
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Best practices for reducing Garbage Collector activity in Javascript
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A lot of the things you need to do to minimize GC churn go against what is considered idiomatic JS in most other scenarios, so please keep in mind the context when judging the advice I give.
Allocation happens in modern interpreters in several places:
Wh...
Painless way to install a new version of R?
...d the lack of an easy upgrade process for R (probably more relevant on Windows than Linux). Does anyone have a good trick for doing the upgrade, from installing the software to copying all the settings/packages over?
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Calling closure assigned to object property directly
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As of PHP7, you can do
$obj = new StdClass;
$obj->fn = function($arg) { return "Hello $arg"; };
echo ($obj->fn)('World');
or use Closure::call(), though that doesn't work on a StdClass.
Before PHP7, you'd have to implement the magic ...
When to use a View instead of a Table?
...sily.
Views can hide database-specific stuff from you. E.g. if you need to do some checks using Oracles SYS_CONTEXT function or many other things
You can easily manage your GRANTS directly on views, rather than the actual tables. It's easier to manage if you know a certain user may only access a vie...