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Django connection to PostgreSQL: “Peer authentication failed”
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221
I took a peek at the exception, noticed it had to do with my connection settings. Went back to s...
How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
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edited Jan 5 '18 at 6:20
Bhuwan
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answ...
fork() branches more than expected?
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answered Jun 21 '12 at 6:58
wallykwallyk
52.3k1111 gold badges7373 silver badges130130 bronze badges
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Argmax of numpy array returning non-flat indices
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162
You could use numpy.unravel_index() on the result of numpy.argmax():
>>> a = numpy.r...
How to use the “required” attribute with a “radio” input field
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edited May 7 at 10:36
answered Nov 27 '11 at 18:31
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How to delete multiple values from a vector?
I have a vector like: a = c(1:10) and I need to remove multiple values, like: 2, 3, 5
8 Answers
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Nullable type issue with ?: Conditional Operator
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edited Nov 17 '08 at 15:34
answered Nov 17 '08 at 15:21
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Return first match of Ruby regex
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135
You could try variableName[/regular expression/]. This is an example output from irb:
irb(mai...
How to avoid warning when introducing NAs by coercion
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142
Use suppressWarnings():
suppressWarnings(as.numeric(c("1", "2", "X")))
[1] 1 2 NA
This su...