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What happens to C# Dictionary lookup if the key does not exist?
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Should I use string.isEmpty() or “”.equals(string)?
...f "".equals(s) is you don't need the null check (equals will check its argument and return false if it's null), which you seem to not care about. If you're not worried about s being null (or are otherwise checking for it), I would definitely use s.isEmpty(); it shows exactly what you're checking, y...
Do interfaces inherit from Object class in java
... with classes) for that matter.(*)
If no then how we are able to call the method of object class on interface instance
An interface implicitly declared one method for each public method in Object. Thus the equals method is implicitly declared as a member in an interface (unless it already inherits...
Edit line thickness of CSS 'underline' attribute
...y: inline; (but it would no longer be block of any kind then, could help somebody though)
– jave.web
Feb 15 at 14:15
Y...
No route matches [GET] /assets
I have a Rails app that I'm trying to test in the production environment. I ran RAILS_ENV=production rake assets:precompile which generated all of my assets in /public/assets. The problem is that when I start my app w/ RAILS_ENV=production rails s thin I get:
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How do I convert dates in a Pandas data frame to a 'date' data type?
I have a Pandas data frame, one of the column contains date strings in the format YYYY-MM-DD
10 Answers
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How can I find all of the distinct file extensions in a folder hierarchy?
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just for reference: if you want to exclude some directories from searching (e.g. .svn), use find . -type f -path '*/.svn*' -prune -o -print | perl -ne 'print $1 if m/\.([^.\/]+)$/' | sort -u source
– Dennis Golomazov
Nov 22 '12 at ...
Example using Hyperlink in WPF
...nction that programmatically opens a web-browser with the address as a parameter.
<TextBlock>
<Hyperlink NavigateUri="http://www.google.com" RequestNavigate="Hyperlink_RequestNavigate">
Click here
</Hyperlink>
</TextBlock>
In the code-behind you wo...
Logic to test that 3 of 4 are True
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I suggest writing the code in a manner that indicates what you mean. If you want 3 values to be true, it seems natural to me that the value 3 appears somewhere.
For instance, in C++:
if ((int)a + (int)b + (int)c + (int)d == 3)
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This is well defined in C++: the standard (§4.7/...
How to remove duplicate values from a multi-dimensional array in PHP
How can I remove duplicate values from a multi-dimensional array in PHP?
19 Answers
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