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Can someone explain in simple terms to me what a directed acyclic graph is?
...Hence B depends on A or in better terms A has an edge directed to B. So in order to reach Node B you have to visit Node A. It will soon be clear that after adding all the subjects with its pre-requisites into a graph, it will turn out to be a Directed Acyclic Graph.
If there was a cycle then yo...
Memcached vs. Redis? [closed]
... can happen if you serialize stale data).
Lists (commands)
Redis lists are ordered collections of strings. They are optimized for inserting, reading, or removing values from the top or bottom (aka: left or right) of the list.
Redis provides many commands for leveraging lists, including commands to p...
combinations between two lists?
...-length tuples, all possible
| orderings, no repeated elements
-----------------------------------------+----------------------------------------
combinations(p, r) | r-length tuples, in sorted order, no
...
Reload .profile in bash shell script (in unix)?
...A COMMON MISTAKE AND CAUSES A LOT OF DEVELOPERS TO LOSE A LOT OF TIME.
In order for your changes applied in your script to have effect for the global environment the script has to be run with
.myscript.sh
command.
In order to make sure that you script is not runned in a subshel you can use thi...
test a file upload using rspec - rails
...args to the helper, rather than args for the post itself. E.g., I had post order_documents_path @order, document: file instead of post order_documents_path(@order), document: file.
– soupdog
Mar 16 '16 at 0:50
...
How to enable mod_rewrite for Apache 2.2
...
In order to use mod_rewrite you can type the following command in the terminal:
sudo a2enmod rewrite
Restart apache2 after
sudo /etc/init.d/apache2 restart
or
sudo service apache2 restart
or as per new unified System Co...
Redirect From Action Filter Attribute
...
@Akbari have you tried setting the Order property of the attributes? Also FilterScope wil impact execution order.
– CRice
Dec 3 '17 at 23:37
...
simple explanation PHP OOP vs Procedural?
...unctions you have ever written in your entire life, listed in alphabetical order by function name
For example: you could have multiple PHP files with functions that are chunked together by subject matter [e.g., functions for doing basic string manipulation, functions for processing arrays, functions...
How to pass an array within a query string?
...)
See comments for examples in node.js, Wordpress, ASP.net
Maintaining order:
One more thing to consider is that if you need to maintain the order of your items (i.e. array as an ordered list), you really only have one option, which is passing a delimited list of values, and explicitly convertin...
Build tree array from flat array in javascript
...son file that I have to handle with javascript to make it hierarchical, in order to later build a tree.
Every entry of the json has :
id : a unique id,
parentId : the id of the parent node (which is 0 if the node is a root of the tree)
level : the level of depth in the tree
...