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How to check if object (variable) is defined in R?
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460
You want exists():
R> exists("somethingUnknown")
[1] FALSE
R> somethingUnknown <- 42
R...
What is the most useful script you've written for everyday life? [closed]
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My o key fell off on my laptop; so I wrote a program that replaces two 0 keystrokes within 200 MS of each other as an o, two 0 keystrokes within 700 MS of each other as a 0 and ignore the rest; so I could use my laptop before I get around to replacing the keyboard.
Wow; I didn't know this would...
disable all form elements inside div
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can i use this to set all inputs inside div to value 0?
– jackson5
Jan 4 '12 at 7:59
2
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ArrayIndexOutOfBoundsException when using the ArrayList's iterator
....iterator().next() again and skipped entries.
– user500074
Jul 14 '11 at 22:34
@ larsmans Ah thank you very much. I to...
Last non-empty cell in a column
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edited Sep 27 '19 at 20:40
Marc.2377
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answere...
vertical divider between two columns in bootstrap
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edited Jan 29 '13 at 10:50
answered Jan 29 '13 at 10:18
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Python: Ignore 'Incorrect padding' error when base64 decoding
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80
As said in other responses, there are various ways in which base64 data could be corrupted.
How...
Replacing instances of a character in a string
...slicing to isolate the section of the string to replace in:
line = line[:10].replace(';', ':') + line[10:]
That'll replace all semi-colons in the first 10 characters of the string.
share
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improv...
Mixin vs inheritance
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answered May 13 '09 at 20:42
Will HartungWill Hartung
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Why do we need virtual functions in C++?
... Neuron
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answered Mar 6 '10 at 13:54
M PerryM Perry
28.1k11 gold badg...