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Replacing column values in a pandas DataFrame
... something like this:
w['female'] = w['female'].map({'female': 1, 'male': 0})
(Here I convert the values to numbers instead of strings containing numbers. You can convert them to "1" and "0", if you really want, but I'm not sure why you'd want that.)
The reason your code doesn't work is because...
Float vs Decimal in ActiveRecord
...a Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
That's why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.100000000000000005551115123125782702...
swift case falling through
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370
Yes. You can do so as follows:
var testVal = "hello"
var result = 0
switch testVal {
case "one...
Why doesn't c++ have &&= or ||= for booleans?
... is then equivalent to static_cast<int>(b) & 2, which results in 0, which is then converted back into a bool. So it’s true that the existence of an operator &&= would improve type safety.
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Font Awesome not working, icons showing as squares
...;v=3.2.1')
– Braulio
Sep 16 '13 at 10:29
1
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How to convert a string to integer in C?
...ns in C99. For example you could say:
uintmax_t num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from atoi:
The call atoi(str) shall be equivalent to:
(int) strtol(str, (char **)NULL, 10)
except that the han...
Set time to 00:00:00
...oblem resetting hours in Java. For a given date I want to set the hours to 00:00:00.
12 Answers
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Finding the max value of an attribute in an array of objects
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808
To find the maximum y value of the objects in array:
Math.max.apply(Math, array.map(function(o...
Use jQuery to get the file input's selected filename without the path
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edited Jun 16 '11 at 0:37
answered Jun 16 '11 at 0:21
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Check if a string contains one of 10 characters
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edited Sep 7 '09 at 20:44
answered Sep 7 '09 at 19:54
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