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Parcelable where/when is describeContents() used?
...ecify CONTENTS_FILE_DESCRIPTOR as return value of describeContents(), i.e. by "special object" (in describeContents()'s description) they really mean: FileDescriptor.
This whole Parcelable functionality looks unfinished (read: has bad design). There is one other strange thing in the docs:
Clas...
Representing and solving a maze given an image
... that final grayscale image is approximately uniform. You can do it simply by controlling sliders in Photoshop in Image -> Adjustments -> Black & White.
Convert image to binary by setting appropriate threshold in Photoshop in Image -> Adjustments -> Threshold.
Make sure threshold is ...
Any equivalent to .= for adding to beginning of string in PHP?
...t something prepended onto it.
You could say the checks are optional, but by having that in there you don't need to worry about passing in a null value by accident.
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Way to go from recursion to iteration
...
Usually, I replace a recursive algorithm by an iterative algorithm by pushing the parameters that would normally be passed to the recursive function onto a stack. In fact, you are replacing the program stack by one of your own.
var stack = [];
stack.push(firstObject...
Node package ( Grunt ) installed but not available
...ossibly sudo npm install -g grunt-cli ).
You can establish that's working by typing grunt --version
Now you can install the current version of Grunt local to your project. So from your project's location...
npm install grunt --save-dev
The save-dev switch isn't strictly necessary but is a good ...
How to best position Swing GUIs?
In another thread I stated that I liked to center my GUIs by doing something like this:
2 Answers
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In Objective-C, what is the equivalent of Java's “instanceof” keyword?
...xact comparisons with:
if ([myObject class] == [MyClass class])
but not by using directly MyClass identifier.
Similarily, you can find if the object is of a subclass of your class with:
if ([myObject isKindOfClass:[AnObject class]])
as suggested by Jon Skeet and zoul.
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Install NPM into home directory with distribution nodejs package (Ubuntu)
...nfigure your PATH and MANPATH to see commands in your $NPM_PACKAGES prefix by adding the following to your .zshrc/.bashrc:
# NPM packages in homedir
NPM_PACKAGES="$HOME/.npm-packages"
# Tell our environment about user-installed node tools
PATH="$NPM_PACKAGES/bin:$PATH"
# Unset manpath so we can inh...
What is the difference between $(command) and `command` in shell programming?
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July 2014: The commit f25f5e6 (by Elia Pinto (devzero2000), April 2014, Git 2.0) adds to the nesting issue:
The backquoted form is the traditional method for command substitution, and is supported by POSIX.
However, all but the simplest uses become c...
Understanding slice notation
... with any of the above:
a[start:stop:step] # start through not past stop, by step
The key point to remember is that the :stop value represents the first value that is not in the selected slice. So, the difference between stop and start is the number of elements selected (if step is 1, the default...