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In C#, how to check if a TCP port is available?
... use a TcpClient or generally to connect to a socket how can I first check if a certain port is free on my machine?
19 Answ...
How to comment lines in rails html.erb files? [duplicate]
...ingle line use
<%# commented line %>
to comment a whole block use a if false to surrond your code like this
<% if false %>
code to comment
<% end %>
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How to check if a column exists in Pandas
Is there a way to check if a column exists in a Pandas DataFrame?
3 Answers
3
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Android Json and null values
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@SkyKelsey: Why would you say that? Those are different things with different semantics...
– K-ballo
Feb 15 '13 at 21:22
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How to add two strings as if they were numbers? [duplicate]
...escribes the unary plus operator and some of the useful affects it has on different data types. xkr.us/articles/javascript/unary-add
– mrtsherman
Jan 23 '12 at 19:22
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Will ConfigurationManager.AppSettings[“blah”] throw an exception if “blah” doesn't exist?
Will ConfigurationManager.AppSettings["blah"] throw an exception if "blah" doesn't exist in the web/app.config?
6 Answers
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What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
What is the difference among col-lg-* , col-md-* and col-sm-* in Twitter Bootstrap?
11 Answers
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How to prevent buttons from submitting forms
...n is this button has a default behavior of submit, as stated in the W3 specification as seen here:
W3C HTML5 Button
So you need to specify its type explicitly:
<button type="button">Button</button>
in order to override the default submit type. I just want to point out the reason why thi...
What are the Ruby Gotchas a newbie should be warned about? [closed]
... while (not(expression)); in C/C++/...), actually never runs the statement if the expression is already true. This is because statement until expression is actually syntactic sugar over
until expression
statement
end
, the equivalent of which in C/C++ is while (not(expression)) statement; just ...
javascript check for not null
...e snippet, where we retrieve a form value.
Before further processing check if the value is not null..
10 Answers
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