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Split column at delimiter in data frame [duplicate]
...'))
cbind(df, read.table(text = as.character(df$FOO), sep = "|"))
ID FOO V1 V2
1 11 a|b a b
2 12 b|c b c
3 13 x|y x y
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Suppress Scientific Notation in Numpy When Creating Array From Nested List
... 19.00
Your options with numpy.set_printoptions or numpy.array2string in v1.3 are pretty clunky and limited (for example no way to suppress scientific notation for large numbers). It looks like this will change with future versions, with numpy.set_printoptions(formatter=..) and numpy.array2string(...
How to detect if a variable is an array
...rn toString.call(obj) === "[object Array]";
}
(snippet taken from jQuery v1.3.2 - slightly adjusted to make sense out of context)
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psycopg2: insert multiple rows with one query
...xtras import execute_values
execute_values(cur,
"INSERT INTO test (id, v1, v2) VALUES %s",
[(1, 2, 3), (4, 5, 6), (7, 8, 9)])
Previous Answer:
To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). Indeed, executem...
Convert pem key to ssh-rsa format
...enssl (man genrsa)
openssl genrsa -out dummy-genrsa.pem 2048
In OpenSSL v1.0.1 genrsa is superseded by genpkey so this is the new way to do it (man genpkey):
openssl genpkey -algorithm RSA -out dummy-genpkey.pem -pkeyopt rsa_keygen_bits:2048
With ssh-keygen
ssh-keygen -t rsa -b 2048 -f dummy-s...
How to place two divs next to each other?
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Having two divs,
<div id="div1">The two divs are</div>
<div id="div2">next to each other.</div>
you could also use the display property:
#div1 {
display: inline-block;
}
#div2 {
display: inline-block;
}
jsFiddle exampl...
jQuery: what is the best way to restrict “number”-only input for textboxes? (allow decimal points)
...o more plugins, jQuery has implemented its own jQuery.isNumeric() added in v1.7.
jQuery.isNumeric( value )
Determines whether its argument is anumber.
Samples results
$.isNumeric( "-10" ); // true
$.isNumeric( 16 ); // true
$.isNumeric( 0xFF ); // true
$.isNumeric( "0xFF" ); // ...
How to open files relative to home directory
... Nope, not available to users below 1.9.3 (apidock.com/ruby/v1_9_2_180/Dir/home/class).
– Ian Vaughan
Apr 24 '13 at 12:52
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Unit testing private methods in C#
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In case anyone was wondering as of MSTest.TestFramework v1.2.1 - the PrivateObject and PrivateType classes are unavailable for projects targeting .NET Core 2.0 - There's a github issue for this: github.com/Microsoft/testfx/issues/366
– shiitake
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AngularJS Multiple ng-app within a page
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V1.6 Deprecated: Use angular.element(callback) instead of angular.element(document).ready(callback)). See AngularJS angular.element API Reference. Also github.com/angular/angular.js/commit/…
– georgea...