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Most efficient way to store thousand telephone numbers
...very efficient version of trie, that only uses as little as needed for the indexing and only two levels. In practice it would be nice to see if this can beat a trie with more levels, but I think this depends a lot on the distribution of the numbers (In real live phone numbers are not fully random, b...
How to get first character of a string in SQL?
...ver may be able to optimise LEFT better than SUBSTRING when it is using an index.
– thomasrutter
Apr 27 '09 at 5:26
20
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ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
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Check out this link :
http://edelstein.pebbles.cs.cmu.edu/jadeite/main.php?api=java6&state=class&package=java.math&class=MathContext
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find -exec cmd {} + vs | xargs
...his can be a security vulnerability as if there is a filename like "foo -o index.html" then -o will be treated as an option. Try in empty directory: "touch -- foo\ -o\ index.html; find . | xargs cat". You'll get: "cat: invalid option -- 'o'"
– Tometzky
May 28 '...
How to send password securely over HTTP?
...alid complaint, since you can get them for $30 these days. Is your data really not worth 30 bucks to protect?
– caf
Oct 18 '09 at 2:08
3
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Skip the headers when editing a csv file using Python
...ictReader class, which "skips" the header row and uses it to allowed named indexing.
Given "foo.csv" as follows:
FirstColumn,SecondColumn
asdf,1234
qwer,5678
Use DictReader like this:
import csv
with open('foo.csv') as f:
reader = csv.DictReader(f, delimiter=',')
for row in reader:
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Is there a software-engineering methodology for functional programming? [closed]
...
@Thorsten the basic idea is set=table, map=index. The hard part is keeping indexes and tables synced but this problem can be solved with better set types. One simple set type I implemented is the keyed-set which is a set which uses a key function to test for unicity. ...
What is the difference between the Eclipse Package Explorer and the Eclipse Project Explorer?
It seems to me these two views are virtually identical, especially since Galileo. Is this true, or am I missing out on some features of one or the other?
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How do I access the command history from IDLE?
...... it seems like it is designed to see how used to you are spreading your index and middle fingers apart.
– nonopolarity
Jun 28 '10 at 12:32
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How to iterate object in JavaScript? [duplicate]
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for(index in dictionary) {
for(var index in dictionary[]){
// do something
}
}
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