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Float vs Decimal in ActiveRecord
... why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.10000000000000000555111512312578270211815834045" # not "0.1"!
whereas if you just do
irb:002:0> (1.0/10).to_s
=> "0.1" # the interprer rounds the number for you
So if you are dealing with small fra...
Maven2: Best practice for Enterprise Project (EAR file)
....
So as an example you might do something like this:
<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0...
libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...zhu@vip.qq.com
# FileName: test_download.cpp
# Version: 1.0
# LastChange: 2010-03-09 14:20:44
# Description:
# History:
============================================*/
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include “...
Where are my postgres *.conf files?
...1h
#checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0
#checkpoint_warning = 30s # 0 disables
# - Archiving -
#archive_mode = off # allows archiving to be done
# (change requires restart)
#archive_command = '' # command to use to archive a lo...
What's the difference between equal?, eql?, ===, and ==?
... example, perform type conversion across ==, but not across eql?, so:
1 == 1.0 #=> true
1.eql? 1.0 #=> false
So you're free to override this for your own uses, or you can override == and use alias :eql? :== so the two methods behave the same way.
equal? — identity comparison
Unlike ...
What is difference between XML Schema and DTD?
... I will write this example both in DTD and in XSD.
DTD
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE university[ // --> university as root element
<!ELEMENT university (student*)> // --> university has * = Multiple students
<!ELEMENT student (name,year)&...
How to generate .NET 4.0 classes from xsd?
...here
XSD => XML => C# classes
Example XSD:
<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="shiporder">
<xs:complexType>
<xs:sequence>
<xs:element name="orderperson" type="xs:...
Web colors in an Android color xml resource file
... the benefit of others, please find w3c and x11 below.
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="white">#FFFFFF</color>
<color name="yellow">#FFFF00</color>
<color name="fuchsia">#FF00FF</color>
<color name="red">#FF00...
Twitter bootstrap dropdown goes outside the screen
...o ul.dropdown-menu should do it
Deprecation Notice: As of Bootstrap v3.1.0, .pull-right on dropdown menus is deprecated. To right-align a menu, use .dropdown-menu-right.
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Random float number generation
... employ a more advanced method.
This will generate a number from 0.0 to 1.0, inclusive.
float r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
This will generate a number from 0.0 to some arbitrary float, X:
float r2 = static_cast <float> (rand()) / (static...