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Permission denied on accessing host directory in Docker
...ion inside the container. The important script for this is fix-perms in my base image scripts, which can be found at: https://github.com/sudo-bmitch/docker-base
The important bit from the fix-perms script is:
# update the uid
if [ -n "$opt_u" ]; then
OLD_UID=$(getent passwd "${opt_u}" | cut -f3 ...
Javascript: Extend a Function
... javascript extension.
First let us extend javascript function.
function Base(props) {
const _props = props
this.getProps = () => _props
// We can make method private by not binding it to this object.
// Hence it is not exposed when we return this.
const privateMethod = ()...
What's an elegant way to conditionally add a class to an HTML element in a view?
I occasionally have to add a class to an html element based on a condition. The problem is I can't figure out a clean way of doing it. Here's an example of the stuff I've tried:
...
Plain Old CLR Object vs Data Transfer Object
...what happens a little. In the case of a web service, a proxy is generated based on the exposed state of an object. This means a DTO is created separate from the POCO that just happens to have the same public state as the POCO. It may seem subtle, but it's important. The reason is that even if the...
Get a list of distinct values in List
... Distinct won't work here because for this operator every object is unique based on the hashcode of the object. You need some similar to this - github.com/morelinq/MoreLINQ/blob/master/MoreLinq/DistinctBy.cs
– Bose_geek
Jun 28 at 10:25
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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
...raries. Instead, you can use late binding either in the form of convention-based assembly-scanning (preferred) or XML configuration.
When you do that, however, you must remember to copy the assemblies to the application's bin folder, because that no longer happens automatically. Personally, I rarel...
How to document Ruby code?
... is easy to read the code comments, and it allows you to easily create web-based documentation for your project.
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Difference between natural join and inner join
...t specify the joining columns in a natural join; the join is strictly name-based. See also Wikipedia.)
(There's a cheat in the inner join output; the a. and b. parts would not be in the column names; you'd just have column1, column2, column1, column3 as the headings.)
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Devise - How do I forbid certain users from signing in?
...
Then add the code below to the User model:
class User < ActiveRecord::Base
#this method is called by devise to check for "active" state of the model
def active_for_authentication?
#remember to call the super
#then put our own check to determine "active" state using
#our own "is...
How to check if a given directory exists in Ruby
... write a script which automatically checks out or updates a Subversion URL based on whether a specified directory exists or not.
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