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What are the “standard unambiguous date” formats for string-to-date conversion in R?
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This is documented behavior. From ?as.Date:
format: A character string. If not specified, it will try
'"%Y-%m-%d"' then '"%Y/%m/%d"' on the first non-'NA' element,
and give an error if neither works.
as.Date("01 Jan 2000") ...
Change directory command in Docker?
...n run a script, or a more complex parameter to the RUN. Here is an example from a Dockerfile I've downloaded to look at previously:
RUN cd /opt && unzip treeio.zip && mv treeio-master treeio && \
rm -f treeio.zip && cd treeio && pip install -r requirement...
What is the optimal Jewish toenail cutting algorithm?
...[i+1]
if abs(a-b) == 1:
return False
return True
from itertools import ifilter, permutations
validseqs = ifilter(isValid, permutations([1,2,3,4,5]))
for i in validseqs:
print i
(1, 3, 5, 2, 4)
(1, 4, 2, 5, 3)
(2, 4, 1, 3, 5)
(2, 4, 1, 5, 3)
(2, 5, 3, 1, 4)
(3, 1, 4, 2,...
How to delete all Annotations on a MKMapView
... However the previous line of code will remove all map annotations "PINS" from
the map, including the user location pin "Blue Pin". To remove all map
annotations and keep the user location pin on the map, there are two
possible ways to do that
Example 1, retain the user location annotati...
How can I submit a form using JavaScript?
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will this submit form values from an input tag?
– simanacci
Jun 3 '16 at 8:26
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Why use @PostConstruct?
... container decides to store the bean on the disk store and then restore it from there.
– Bozho
Mar 20 '13 at 9:57
14
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How can I list the contents of a directory in Python?
...list a directory now usually involves the iterdir method on Path objects:
from pathlib import Path
print(*Path("/home/username/www/").iterdir(), sep="\n")
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How to simulate a touch event in Android?
...swipe_monkey.py
#
# Imports the monkeyrunner modules used by this program
from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice
# Connects to the current device
device = MonkeyRunner.waitForConnection()
# A swipe left from (x1, y) to (x2, y) in 2 steps
y = 400
x1 = 100
x2 = 300
start = ...
Signed versus Unsigned Integers
...ooking at an 8-bit number:
unsigned values 0 to 255
signed values range from -128 to 127
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Java String array: is there a size of method?
I come from a php background and in php, there is an array_size() function which tells you how many elements in the array are used.
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