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How to round up to the nearest 10 (or 100 or X)?
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If you just want to round up to the nearest power of 10, then just define:
roundUp <- function(x) 10^ceiling(log10(x))
This actually also works when x is a vector:
> roundUp(c(0.0023, 3.99, 10, 1003))
[1] 1e-02 1e+01 1e+01 1e+04
..but if you want to round to a "nice"...
How to open a file for both reading and writing?
...reopening:
with open(filename, "r+") as f:
data = f.read()
f.seek(0)
f.write(output)
f.truncate()
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Read input from console in Ruby?
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230
Are you talking about gets?
puts "Enter A"
a = gets.chomp
puts "Enter B"
b = gets.chomp
c = a.t...
Python: changing value in a tuple
...d to ask, why you want to do this?
But it's possible via:
t = ('275', '54000', '0.0', '5000.0', '0.0')
lst = list(t)
lst[0] = '300'
t = tuple(lst)
But if you're going to need to change things, you probably are better off keeping it as a list
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Round to at most 2 decimal places (only if necessary)
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Use Math.round(num * 100) / 100
Edit: to ensure things like 1.005 round correctly, we use
Math.round((num + Number.EPSILON) * 100) / 100
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Is there a way to access an iteration-counter in Java's for-each loop?
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edited Sep 29 '16 at 20:49
ragerdl
1,7961515 silver badges2626 bronze badges
answered Jan 25 '09 at ...
How to create file execute mode permissions in Git on Windows?
...Temp\TestRepo>git add foo.sh
C:\Temp\TestRepo>git ls-files --stage
100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0 foo.sh
As you note, after adding, the mode is 0644 (ie, not executable). However, we can mark it as executable before committing:
C:\Temp\TestRepo>git update-index...
`if __name__ == '__main__'` equivalent in Ruby
... really a good, clean way of doing this.
EDIT: Found it.
if __FILE__ == $0
foo()
bar()
end
But it's definitely not common.
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Calculating sum of repeated elements in AngularJS ng-repeat
...</td>
In Controller
$scope.getTotal = function(){
var total = 0;
for(var i = 0; i < $scope.cart.products.length; i++){
var product = $scope.cart.products[i];
total += (product.price * product.quantity);
}
return total;
}
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How do I convert a String to an int in Java?
...= Integer.parseInt(myString);
}
catch (NumberFormatException e)
{
foo = 0;
}
(This treatment defaults a malformed number to 0, but you can do something else if you like.)
Alternatively, you can use an Ints method from the Guava library, which in combination with Java 8's Optional, makes for a po...