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Why is XOR the default way to combine hashes?
...tter than and and or, but that doesn't say much.
xor is symmetric, so the order of the elements is lost. So "bad" will hash combine the same as "dab".
xor maps pairwise identical values to zero, and you should avoid mapping "common" values to zero:
So (a,a) gets mapped to 0, and (b,b) also gets ...
How to read json file into java with simple JSON library
... = new String(Files.readAllBytes(Paths.get(fileName)), StandardCharsets.UTF_8);
JSONObject obj = new JSONObject(text);
JSONArray arr = obj.getJSONArray("employees");
for(int i = 0; i < arr.length(); i++){
String name = arr.getJSONObject(i).get...
What is the difference between user and kernel modes in operating systems?
...e the state and returns to user mode.
http://en.wikibooks.org/wiki/Windows_Programming/User_Mode_vs_Kernel_Mode
http://tldp.org/HOWTO/KernelAnalysis-HOWTO-3.html
http://en.wikipedia.org/wiki/Direct_memory_access
http://en.wikipedia.org/wiki/Interrupt_request
...
How to swap keys and values in a hash
...>[:c, :b]}
h.inverse.inverse
=> {:a=>1, :c=>2, :b=>2} # order might not be preserved
h.inverse.inverse == h
=> true # true-ish because order might change
whereas the built-in invert method is just broken:
h.invert
=> {1=>:a, 2=>:c} # FAIL
...
Can a Windows batch file determine its own file name?
... gives "c:\tmp\foo.bat". Note the pieces are always assembled in canonical order, so if you get cute and try %~xnpd0, you still get "c:\tmp\foo.bat"
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When creating a service with sc.exe how to pass in context parameters?
...my repositories".
So in summary
space after each sc parameter: binpath=_, displayname=_ and depend=_
each sc parameter that contains spaces must be enclosed in quotes
all additional quotes inside the binpath are escaped with backslashes: \"
all backslashes inside the binpath are not escaped
...
Does a view exist in ASP.NET MVC?
...nswered May 8 '13 at 23:35
Simon_WeaverSimon_Weaver
113k7272 gold badges545545 silver badges596596 bronze badges
...
The simplest way to resize an UIImage?
... = UIGraphicsImageRenderer(size: newSize)
let image = renderer.image { _ in
self.draw(in: CGRect.init(origin: CGPoint.zero, size: newSize))
}
return image.withRenderingMode(self.renderingMode)
}
And here's the Objective-C version:
@implementation UIImage (ResizeCategory)
- (U...
Can't get Gulp to run: cannot find module 'gulp-util'
...t this problem try reinstalling your project's local packages:
rm -rf node_modules/
npm install
OUTDATED ANSWER
You also need to install gulp-util:
npm install gulp-util --save-dev
From gulp docs- getting started (3.5):
Install gulp and gulp-util in your project devDependencies
...
Open a new tab in gnome-terminal using command line [closed]
...
#!/bin/sh
WID=$(xprop -root | grep "_NET_ACTIVE_WINDOW(WINDOW)"| awk '{print $5}')
xdotool windowfocus $WID
xdotool key ctrl+shift+t
wmctrl -i -a $WID
This will auto determine the corresponding terminal and opens the tab accordingly.
...