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What are the options for storing hierarchical data in a relational database? [closed]
...he hierarchy.
The problem up until now has been that the coversion method from an Adjacecy List to Nested Sets has been frightfully slow because most people use the extreme RBAR method known as a "Push Stack" to do the conversion and has been considered to be way to expensive to reach the Nirvana o...
How do I use vi keys in ipython under *nix?
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In case someone's wandering in here recently, IPython 5.0 switched from readline to prompt_toolkit, so an updated answer to this question is to pass an option:
$ ipython --TerminalInteractiveShell.editing_mode=vi
... or to set it globally in the profile configuration (~/.ipython/profile_d...
How to get the URL of the current page in C# [duplicate]
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You may at times need to get different values from URL.
Below example shows different ways of extracting different parts of URL
EXAMPLE: (Sample URL)
http://localhost:60527/WebSite1test/Default2.aspx?QueryString1=1&QueryString2=2
CODE
Response.Write("<br/> " + ...
Lightweight Javascript DB for use in Node.js [closed]
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NeDB seems to be what you are looking for. From the blurb:
Embedded persistent database for Node.js, written in Javascript, with no dependency (except npm modules of course). You can think of it as a SQLite for Node.js projects, which can be used with a simple req...
How to tell if node.js is installed or not
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@user1340052, exec() returns the last line from the output, so you should be fine there. php.net/manual/en/function.exec.php
– Brad
May 7 '12 at 2:37
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Accessing constructor of an anonymous class
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From the Java Language Specification, section 15.9.5.1:
An anonymous class cannot have an
explicitly declared constructor.
Sorry :(
EDIT: As an alternative, you can create some final local variables, and/or include a...
Get list of a class' instance methods
...t class only.
TestClass.instance_methods(false)
would return the methods from your given example (since they are instance methods of TestClass).
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Purpose of returning by const value? [duplicate]
...ve non-const operation on an object, returning by const-value prevents you from accidentally calling this operation on a temporary. Imagine that + returned a non-const value, and you could write:
(a + b).expensive();
In the age of C++11, however, it is strongly advised to return values as non-con...
Best Practice to Organize Javascript Library & CSS Folder Structure [closed]
... grouping of your files you must start by separating general-purpose files from application-specific resources. appcropolis-project resources vendors my-index.html This simple separation makes navigating through your files a lot easier. Once you place libraries and general-purpose files inside...
What are bitwise operators?
...hen dealing with different sizes of data. For example, reading an integer from four bytes:
int val = (A << 24) | (B << 16) | (C << 8) | D;
Assuming that A is the most-significant byte and D the least. It would end up as:
A = 01000000
B = 00000101
C = 00101011
D = 11100011
val...