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How do I find a default constraint using INFORMATION_SCHEMA?
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As I understand it, default value constraints aren't part of the ISO standard, so they don't appear in INFORMATION_SCHEMA. INFORMATION_SCHEMA seems like the best choice for this kind of task because it is cross-platform, but if the informati...
Android, canvas: How do I clear (delete contents of) a canvas (= bitmaps), living in a surfaceView?
In order to make a simple game, I used a template that draws a canvas with bitmaps like this:
18 Answers
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Can I obtain method parameter name using Java reflection?
...ter type is possible, using method.getParameterTypes()
For the sake of writing autocomplete functionality for an editor (as you stated in one of the comments) there are a few options:
use arg0, arg1, arg2 etc.
use intParam, stringParam, objectTypeParam, etc.
use a combination of the above - the ...
Should I use s and s inside my s?
The title pretty much explains it.
8 Answers
8
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Vim clear last search highlighting
...noh
Or turn off highlighting completely:
set nohlsearch
Or, to toggle it:
set hlsearch!
nnoremap <F3> :set hlsearch!<CR>
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How to deep watch an array in angularjs?
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edited May 29 '18 at 9:55
Ivar
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Finding duplicate values in a SQL table
It's easy to find duplicates with one field:
33 Answers
33
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Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
...rmation:
for blink browsers slice() is the fastest method, concat() is a bit slower, and while loop is 2.4x slower.
for other browsers while loop is the fastest method, since those browsers don't have internal optimizations for slice and concat.
This remains true in Jul 2016.
Below are simple sc...
Why am I getting error for apple-touch-icon-precomposed.png
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I guess apple devices make those requests if the device owner adds the site to it. This is the equivalent of the favicon. To resolve, add 2 100×100 png files, save it as apple-touch-icon-precomposed.png and apple-touch-icon.png and upload it to the root directory of the server. After that, the e...
How to randomize (or permute) a dataframe rowwise and columnwise?
... replace=FALSE (the default) to sample(...) ensures that sampling is done without replacement which accomplishes a row wise shuffle.
Shuffle column-wise:
> df3 <- df1[,sample(ncol(df1))]
> df3
c a b
1 0 1 1
2 0 1 0
3 0 0 1
4 0 0 0
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