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What are the “standard unambiguous date” formats for string-to-date conversion in R?
...-'NA' element,
and give an error if neither works.
as.Date("01 Jan 2000") yields an error because the format isn't one of the two listed above. as.Date("01/01/2000") yields an incorrect answer because the date isn't in one of the two formats listed above.
I take "standard unambiguou...
How to get the tag HTML with JavaScript / jQuery?
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313
The simplest way to get the html element natively is:
document.documentElement
Here's the re...
libxml/tree.h no such file or directory
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214
Follow the directions here, under "Setting up your project file."
Setting up your project f...
Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
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edited Jul 7 '11 at 21:58
sarnold
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How does a Java HashMap handle different objects with the same hash code?
...
14 Answers
14
Active
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How do you remove a Cookie in a Java Servlet
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139
The MaxAge of -1 signals that you want the cookie to persist for the duration of the session. ...
What does JVM flag CMSClassUnloadingEnabled actually do?
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219
Update This answer is relevant for Java 5-7, Java 8 has this fixed: https://blogs.oracle.com/po...
What is the proper way to format a multi-line dict in Python?
...ces beyond the indentations. As always, be consistent.
mydict = {
"key1": 1,
"key2": 2,
"key3": 3,
}
mylist = [
(1, 'hello'),
(2, 'world'),
]
nested = {
a: [
(1, 'a'),
(2, 'b'),
],
b: [
(3, 'c'),
(4, 'd'),
],
}
Similarly, here'...