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Why is 1/1/1970 the “epoch time”?
...clock on the hardware of
the early Unix systems. The value 60
Hz still appears in some software
interfaces as a result. The epoch also
differed from the current value. The
first edition Unix Programmer's Manual
dated November 3, 1971 defines the
Unix time as "the time since 00:00:00,
...
What is Prism for WPF?
...soft Patterns and Practices Team official guidance for building "composite applications" in WPF and Silverlight.
Its intended to provide guidance on the best practices for building large scale applications which are flexible in terms of development and maintainability.
This includes guidance on de...
How do I get ASP.NET Web API to return JSON instead of XML using Chrome?
...
I just add the following in App_Start / WebApiConfig.cs class in my MVC Web API project.
config.Formatters.JsonFormatter.SupportedMediaTypes
.Add(new MediaTypeHeaderValue("text/html") );
That makes sure you get JSON on most queries, but you can g...
What happens if you don't commit a transaction to a database (say, SQL Server)?
...ion, it's still "running" and potentially holding locks.
If your client (application or user) closes the connection to the database before committing, any still running transactions will be rolled back and terminated.
shar...
Eclipse error: 'Failed to create the Java Virtual Machine'
...VirtualMachines/jdk1.8.0_172.jdk/Contents/Home/bin/java" below "--launcher.appendVmargs" in eclipse.ini.
– clark yu
Mar 30 at 2:58
...
No secret option provided to Rack::Session::Cookie warning?
...e/session/abstract_store.rb
module Compatibility
def initialize(app, options = {})
options[:key] ||= '_session_id'
#fixed warning - SECURITY WARNING: No secret option provided to Rack::Session::Cookie.
options[:secret] ||= Rails.application.config.s...
Tell Ruby Program to Wait some amount of time
...e can be an integer or float.
Also, if you're writing this within a Rails app, or have included the ActiveSupport library in your project, you can construct longer intervals using the following convenience syntax:
sleep(4.minutes)
# or, even longer...
sleep(2.hours); sleep(3.days) # etc., etc.
# o...
Enable 'xp_cmdshell' SQL Server
...the previous values, you can read them from sys.configurations first, then apply them in reverse order at the end. We can also avoid unnecessary reconfigure calls:
declare @prevAdvancedOptions int
declare @prevXpCmdshell int
select @prevAdvancedOptions = cast(value_in_use as int) from sys.configu...
BeautifulSoup Grab Visible Webpage Text
...
The approved answer from @jbochi does not work for me. The str() function call raises an exception because it cannot encode the non-ascii characters in the BeautifulSoup element. Here is a more succinct way to filter the exampl...
How to install Xcode Command Line Tools
...o longer available through Xcode. Instead they must be downloaded from the Apple Developer Tools site: https://developer.apple.com/downloads/index.action. This requires signing in with a developer account.
Or via terminal (from the release docs): The Command Line Developer Tools package can be inst...