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Convert data.frame column to a vector?
I have a dataframe such as:
11 Answers
11
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Remove insignificant trailing zeros from a number?
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If you convert it to a string it will not display any trailing zeros, which aren't stored in the variable in the first place since it was created as a Number, not a String.
var n = 1.245000
var noZeroes = n.toString() // "1.245"
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PostgreSQL return result set as JSON array?
...ion describes how to generate a JSON array of objects, with each row being converted to a single object. The result looks like this:
[{"a":1,"b":"value1"},{"a":2,"b":"value2"},{"a":3,"b":"value3"}]
9.3 and up
The json_agg function produces this result out of the box. It automatically figures out...
The maximum recursion 100 has been exhausted before statement completion
...select DateValue + 1 from DateList
where DateValue + 1 < convert(VARCHAR(15),@EntDt,101)
)
select count(*) as DayCnt from (
select DateValue,DATENAME(WEEKDAY, DateValue ) as WEEKDAY from DateList
where DATENAME(WEEKDAY, DateValue ) not IN ( 'Saturday','Sunday' ) ...
Convert UTC to local time in Rails 3
I'm having trouble converting a UTC Time or TimeWithZone to local time in Rails 3.
6 Answers
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Python list subtraction operation
... @BarnabasSzabolcs: That won't save a thing, because it will convert y to a set before every check (which is similar cost to original work). You'd need to either do yset = set(y) outside the listcomp, then test if item not in yset, or as an egregious hack, do [item for yset in [set(y)]...
How do I convert a Ruby class name to a underscore-delimited symbol?
... Should be FooBar.to_s.underscore.to_sym, since I'm trying to convert a class (which is a constant) into a symbol, which I can then feed to Factory Girl. :)
– Josh Glover
Apr 11 '11 at 14:31
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
...ykey = '.ykey', yvalue = '.yvalue',
na.rm = FALSE, convert = FALSE, factor_key = FALSE) {
vars <- quos(...)
xkey <- enquo(xkey)
xvalue <- enquo(xvalue)
ykey <- enquo(ykey)
yvalue <- enquo(yvalue)
data %>% {
cbind(gather(., key = !!xkey, valu...
What is “2's Complement”?
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Awesome .Added extra parts of converting bits to negative integer.
– Suraj Jain
Aug 22 '16 at 22:35
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How to convert an address into a Google Maps Link (NOT MAP)
...Google maps links.
See a demo here.
$(document).ready(function () {
//Convert address tags to google map links - Michael Jasper 2012
$('address').each(function () {
var link = "<a href='http://maps.google.com/maps?q=" + encodeURIComponent( $(this).text() ) + "' target='_blank'>" ...