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indexOf method in an object array?
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How to set breakpoints on future shared libraries with a command flag
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Paste multiple columns together
...c('d', 'e', 'f'),
'd' = c('g', 'h', 'i'))
tidyr::unite_(data, paste(colnames(data)[-1], collapse="_"), colnames(data)[-1])
a b_c_d
1 1 a_d_g
2 2 b_e_h
3 3 c_f_i
Edit: Exclude first column, everything else gets pasted.
# tidyr_0.6.3
unite(data, newCol, -a)
# or by colum...
What's the difference between %s and %d in Python string formatting?
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How to properly reuse connection to Mongodb across NodeJs application and modules
...re( 'mongodb' ).MongoClient;
const url = "mongodb://localhost:27017";
var _db;
module.exports = {
connectToServer: function( callback ) {
MongoClient.connect( url, { useNewUrlParser: true }, function( err, client ) {
_db = client.db('test_db');
return callback( err );
} );...
What does the smiley face “:)” mean in CSS?
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RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
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How to get std::vector pointer to the raw data?
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How to write DataFrame to postgres table?
...se an older version of pandas, here is a patched version of pandas.io.sql: https://gist.github.com/jorisvandenbossche/10841234.
I wrote this a time ago, so cannot fully guarantee that it always works, buth the basis should be there). If you put that file in your working directory and import it, then...
Vim clear last search highlighting
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From http://twitter.com/jonbho/status/2194406821
" Clear highlighting on escape in normal mode
nnoremap <esc> :noh<return><esc>
nnoremap <esc>^[ <esc>^[
The second line is needed for mapping to the...