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curl POST format for CURLOPT_POSTFIELDS
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edited Mar 7 '11 at 20:40
answered Mar 7 '11 at 20:35
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Google Gson - deserialize list object? (generic type)
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edited Mar 20 '18 at 12:20
Daniel Pryden
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Maximum on http header values?
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325
No, HTTP does not define any limit. However most web servers do limit size of headers they acce...
What are the pros and cons of the SVN plugins for Eclipse, Subclipse and Subversive? [closed]
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32 Answers
32
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How to extend an existing JavaScript array with another array, without creating a new array
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Arsen Khachaturyan
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answered Sep 3 '09 at 15:27
DzinXDzinX
43....
jQuery object equality
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225
Since jQuery 1.6, you can use .is. Below is the answer from over a year ago...
var a = $('#fo...
How do I check if a variable exists in a list in BASH
...ho 'no'
or create a function:
contains() {
[[ $1 =~ (^|[[:space:]])$2($|[[:space:]]) ]] && exit(0) || exit(1)
}
to use it:
contains aList anItem
echo $? # 0： match, 1: failed
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How to get an object's properties in JavaScript / jQuery?
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142
You can look up an object's keys and values by either invoking JavaScript's native for in loop:
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Remove duplicated rows using dplyr
...tion for this purpose.
Original answer below:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_num...
MySQL, update multiple tables with one query
..., we increase the number of books in a particular order with Order.ID = 1002 in Orders table then we also need to reduce that the total number of books available in our stock by the same number in Books table.
UPDATE Books, Orders
SET Orders.Quantity = Orders.Quantity + 2,
Books.InStock = Books....