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Restrict varchar() column to specific values?
...pression that is not
based on data in another column. For
example, the range of values for a
salary column can be limited by
creating a CHECK constraint that
allows for only data that ranges from
$15,000 through $100,000. This
prevents salaries from being entered
beyond the regular s...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
... import *
import random
sequence = [random.randint(0, 99999999) for i in xrange(1000000)]
sorter = Popen('sort1mb.exe', stdin=PIPE, stdout=PIPE)
for value in sequence:
sorter.stdin.write('%08d\n' % value)
sorter.stdin.close()
result = [int(line) for line in sorter.stdout]
print('OK!' if resul...
How do I convert an integer to binary in JavaScript?
... what
JS uses as its not sure how many bits are in your number range. There are
some suggestions https://stackoverflow.com/questions/10936600/javascript-decimal-to-binary-64-bit
*/
return (~dec).toString(2);
}
}
I had some help from here
...
What is the purpose of the single underscore “_” variable in Python?
...1, 2, 3)
>>> x
1
>>> y
3
Ignore the index
for _ in range(10):
do_something()
share
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Python: using a recursive algorithm as a generator
...en(string) == 1:
yield prefix + string
else:
for i in xrange(len(string)):
for perm in getPermutations(string[:i] + string[i+1:], prefix+string[i]):
yield perm
Or without an accumulator:
def getPermutations(string):
if len(string) == 1:
...
inserting characters at the start and end of a string
...d position:
>>> s = "0123456789"
>>> s[2]
'2'
Calling range with start and end position:
>>> s[4:6]
'45'
Calling part of a string before that position:
>>> s[:6]
'012345'
Calling part of a string after that position:
>>> s[4:]
'456789'
Inserti...
How to copy commits from one branch to another?
...cal order that the commits appear in Branch A.
cherry-pick does support a range of commits, but if you have merge commits in that range, it gets really complicated
git checkout B
git cherry-pick SHA-COMMIT-X
git cherry-pick SHA-COMMIT-Y
git cherry-pick SHA-COMMIT-Z
Example of workflow :
We ca...
Why no generics in Go?
...be used thusly:
func Sum(type T Addable)(l []T) (total T) {
for _, e := range l {
total += e
}
return total
}
This is a proposal at this stage.
Your filter(predicate, list) function could be implemented with a type parameter like this:
func Filter(type T)(f func(T) bool, l []T) (res...
How to get line count of a large file cheaply in Python?
...very line is counting as 1. >>> [ 1 for line in range(10) ] [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] >>> sum( 1 for line in range(10) ) 10 >>>
– James
Dec 13 '13 at 5:22
...
Should I index a bit field in SQL Server?
...n, SQL's index contains a set of rows for each index value. If you have a range of 1 to 10, then you would have 10 index pointers. Depending on how many rows there are this can be paged differently. If your query looks for the index matching "1" and then where Name contains "Fred" (assuming the N...