1. Type character
Sometimes it is necessary to directly add the type character to specify the type clearly. The commonly used type characters are listed below< /p> Type Character Short S
Month: October 2021
Ruby variable initialization
There is an execution path in the code below, where “bar” is not set before the test. Is it safe in Ruby? Will “bar” be initialized by default?
if foo
bar = true
end
if bar
puts “true”< br
.NET – strongly convert a reflection .getValue () object to generic DBSET
I am using EF 4.3.1 in VS 2010 (.Net 4.0) to load a large number of reference tables from the database in order to bind them to controls in a WinForms application. < /p> When the form loads, I get
How to solve System.TypeInitializationException is unprocessed in VB.NET?
I created a vb.net console application when I run the source code and it works fine. But when I run the executable file, it throws a message like “System. TypeInitializationException unhandled” exa
[VB.NET TIPS] start and termination
When executing a VB.NET application, the CLR will translate IL into x86 instructions and look for a method named Main.
And execute the program from this method. The Main method is also called the
VB.NET – ODP.NET ORA-12154 A TNS error occurs only as a service run
I am writing a service in VB.NET, using ODP.NET to continuously log data to Oracle DB
The application was originally designed as a basic Written in a Windows Forms application, but when I por
How to create a file in Ruby
I am trying to create a new file, but things don’t seem to work as I expected. Here is what I tried:
File.new “out.txt”
File.open “out.txt”
File.new “out.txt”,”w”
File.open “out .txt”,”
Ruby – What does various parameter prefixes mean when declaring methods?
When declaring a method, what do the various prefixes of the parameters mean?
sh(*cmd, &block) What does the * before cmd mean?
What & what does it mean before the block
def foo(*
VB.NET image mask is smooth along the edge
Hey all I want to make my image look beautiful and smooth (anti-aliasing) by using a mask, in order to make a circular image, as shown below: The original image looks like this:
The mask of
Ruby-on-rails – Ruby On Rails Script Console
I could not run ./script/console before because my script console file contains #! /usr/bin/env ruby19, so it used to throw an error. After clicking and trying out, I used #! /usr/bin/env rubyR