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Difference between Role and GrantedAuthority in Spring Security
There are concepts and implementations in Spring Security, such as the GrantedAuthority interface to get an authority to authorize/control an access.
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How to output a multiline string in Bash?
How can I output a multipline string in Bash without using multiple echo calls like so:
7 Answers
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Loop through files in a directory using PowerShell
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Give this a try:
Get-ChildItem "C:\Users\gerhardl\Documents\My Received Files" -Filter *.log |
Foreach-Object {
$content = Get-Content $_.FullName
#filter and save content to the original file
$content | Where-Object {$_ -match 'step[49]...
class
...nt self object (which inside a class or module body is the class or module itself). Usually, this is used to define class/module ("static") methods:
class String
class << self
def value_of obj
obj.to_s
end
end
end
String.value_of 42 # => "42"
This can also be written...
Will using 'var' affect performance?
...y I see so many examples use the varkeyword and got the answer that while it is only necessary for anonymous types, that it is used nonetheless to make writing code 'quicker'/easier and 'just because'.
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rgdal package installation
... I have found already a pretty nice example here , but rather how to make it work. In fact, I am unable to load library rgdal :
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Good examples of Not a Functor/Functor/Applicative/Monad?
...ewtype T a = T (a -> Int)
You can make a contravariant functor out of it, but not a (covariant) functor. Try writing fmap and you'll fail. Note that the contravariant functor version is reversed:
fmap :: Functor f => (a -> b) -> f a -> f b
contramap :: Contravariant f ...
How to prevent gcc optimizing some statements in C?
In order to make a page dirty (switching on the dirty bit in the page table entry), I touch the first bytes of the page like this:
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Get Android .apk file VersionName or VersionCode WITHOUT installing apk
...version name of my apk from the AndroidManifest.xml file after downloading it and without installing it.
8 Answers
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Get operating system info
I recently started wondering about sites like http://thismachine.info/ that get the user's operating system info. I have not been able to find out how to do that with PHP, and wanted to try to figure it out.
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