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Null or default comparison of generic argument in C#
...is respects IEquatable<T> (without boxing) as well as object.Equals, and handles all the Nullable<T> "lifted" nuances. Hence:
if(EqualityComparer<T>.Default.Equals(obj, default(T))) {
return obj;
}
This will match:
null for classes
null (empty) for Nullable<T>
zero/f...
Comma separator for numbers in R?
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This is a very late response, and it may have been true in the past that comma_format didn't handle real numbers but now you can do the following: scales::comma_format(digits = 12)(1000000.789) which results in the following: "1,000,000.789".
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Why cannot cast Integer to String in java?
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Why this is not possible:
Because String and Integer are not in the same Object hierarchy.
Object
/ \
/ \
String Integer
The casting which you are trying, works only if they are in the same hierarchy, e.g.
Object
/
/...
Is it possible to have empty RequestParam values use the defaultValue?
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You could change the @RequestParam type to an Integer and make it not required. This would allow your request to succeed, but it would then be null. You could explicitly set it to your default value in the controller method:
@RequestMapping(value = "/test", method = RequestMeth...
How to run script as another user without password?
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Call visudo and add this:
user1 ALL=(user2) NOPASSWD: /home/user2/bin/test.sh
The command paths must be absolute! Then call sudo -u user2 /home/user2/bin/test.sh from a user1 shell. Done.
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Multiple arguments to function called by pthread_create()?
...way to do this is to define a struct, pass the function a pointer to that, and dereference it for the arguments. However, I am unable to get this to work:
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How can I open a Shell inside a Vim Window?
I can open a shell by using the :shell command in Vim, however I can't edit a file and at the same time use the shell.
10 A...
Getting “Skipping JaCoCo execution due to missing execution data file” upon executing JaCoCo
I'm using Maven 3.0.3, JUnit 4.8.1, and Jacoco 0.6.3.201306030806, and I am trying to create test coverage reports.
16 Answ...
Find size of Git repository
...e (which can get considerable)
reflogs
backups (from filter-branch, e.g.) and various other things (intermediate
state from rebase, bisect etc.)
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How to get 30 days prior to current date?
I have a start calendar input box and an end calendar input box. We want defaults start calendar input box 30 days prior to current date and the end calendar input box to be the current date. Here is my date vars.
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