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Android Endless List
...
One solution is to implement an OnScrollListener and make changes (like adding items, etc.) to the ListAdapter at a convenient state in its onScroll method.
The following ListActivity shows a list of integers, starting with 40, adding items when the user scrolls to the end...
What's the nearest substitute for a function pointer in Java?
...gFunction sf) {
int i = sf.func("my string");
// do whatever ...
}
And would be called like so:
ref.takingMethod(new StringFunction() {
public int func(String param) {
// body
}
});
EDIT: In Java 8, you could call it with a lambda expression:
ref.takingMethod(param -> ...
Ruby capitalize every word first letter
...as"
"kirkDouglas"
"KirkDouglas"
#titleize gotchas
Rails's titleize will convert things like dashes and underscores into spaces and can produce other unexpected results, especially with case-sensitive situations as pointed out by @JamesMcMahon:
"hEy lOok".titleize #=> "H Ey Lo Ok"
because it...
“Diff” an image using ImageMagick
... approach, particularly when comparing images which are mostly grayscale:
convert '(' file1.png -flatten -grayscale Rec709Luminance ')' \
'(' file2.png -flatten -grayscale Rec709Luminance ')' \
'(' -clone 0-1 -compose darken -composite ')' \
-channel RGB -combine diff.png
...
IndentationError: unindent does not match any outer indentation level
...t Sublime Text to use tabs for indentation:
View --> Indentation --> Convert Indentation to Tabs
Uncheck the Indent Using Spaces option as well in the same sub-menu above.
This will immediately resolve this issue.
sha...
using lodash .groupBy. how to add your own keys for grouped output?
...rt groupBy from "lodash/fp/groupBy";
const map = require('lodash/fp/map').convert({ 'cap': false });
const result = flow(
groupBy('color'),
map((users, color) => ({color, users})),
tap(console.log)
)(input)
Where input is an array that you want to convert.
...
Javascript parseInt() with leading zeros
...value, the radix is 10 (decimal).
If the first character cannot be converted to a number, parseInt returns NaN.
And from the ECMAScript 3 standard:
When radix is 0 or undefined and the string's number begins with a 0
digit not followed by an x or X, then the implementation may, at it...
How to correctly use the extern keyword in C
...keyword, the function / variable is assumed to be available somewhere else and the resolving is deferred to the linker.
There's a difference between "extern" on functions and on variables: on variables it doesn't instantiate the variable itself, i.e. doesn't allocate any memory. This needs to be do...
Bash syntax error: unexpected end of file
...m on StackOverflow
Open the file in Vim and try
:set fileformat=unix
Convert eh line endings to unix endings and see if that solves the
issue. If editing in Vim, enter the command :set fileformat=unix and
save the file. Several other editors have the ability to convert line
endings, such...
How do I count the number of occurrences of a char in a String?
... Although i will not downvote this, it is (a) requiring 3rd party libs and (b) expensive.
– javadba
Jan 23 '14 at 21:24
...