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What would cause an algorithm to have O(log n) complexity?
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Also note that this is the most concise way to denote the number in this range. Any reduction will lead to information loss, as a missing digit can be mapped to 10 other numbers. For example: 12* can be mapped to 120, 121, 122, …, 129.
2. How do you search for a number in (0, N - 1)?
Taking N ...
Output to the same line overwriting previous output?
...lf):
self.text = ''
def moveup(self, lines):
for _ in range(lines):
sys.stdout.write("\x1b[A")
def reprint(self, text):
# Clear previous text by overwritig non-spaces with spaces
self.moveup(self.text.count("\n"))
sys.stdout.write(re.sub(...
Why doesn't list have safe “get” method like dictionary?
...cept IndexError:
return default
def _test():
l = safelist(range(10))
print l.get(20, "oops")
if __name__ == "__main__":
_test()
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In Python, how do I create a string of n characters in one line of code?
...ii_lowercase
n = 10
string_val = "".join(choice(ascii_lowercase) for i in range(n))
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range() for floats
Is there a range() equivalent for floats in Python?
21 Answers
21
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Adding values to a C# array
... try to access it's non existent indexes to set values, you'll get an OutOfRangeException as soon as you run the code. Arrays need to be initialized with the size you are going to use, they reserve all the space at the beginning, witch makes them very fast, but not possible for them to be resized.
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Selecting the last value of a column
...iveSheet().getMaxRows();
var values = SpreadsheetApp.getActiveSheet().getRange(column + "1:" + column + lastRow).getValues();
for (; values[lastRow - 1] == "" && lastRow > 0; lastRow--) {}
return values[lastRow - 1];
}
Usage:
=lastValue("G")
EDIT:
In response to the comment a...
Memoization in Haskell?
...dex and nats in terms of index' and nats'.
index' t n is defined over the range [1..]. (Recall that index t is defined over the range [0..].) It works searches the tree by treating n as a string of bits, and reading through the bits in reverse. If the bit is 1, it takes the right-hand branch. I...
Read file from line 2 or skip header row
...ns the comma-delimited
strings on each line as a list"""
for _ in range(numberheaderlines):
yield map(str.strip, filehandle.readline().strip().split(','))
with open('coordinates.txt', 'r') as rh:
# Single header line
#print next(__readheader(rh))
# Multiple header line...
Math - mapping numbers
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Divide to get the ratio between the sizes of the two ranges, then subtract the starting value of your inital range, multiply by the ratio and add the starting value of your second range. In other words,
R = (20 - 10) / (6 - 2)
y = (x - 2) * R + 10
This evenly spreads the num...