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How to start two threads at “exactly” the same time
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To start the threads at exactly the same time (at least as good as possible), you can use a CyclicBarrier:
// We want to start just 2 threads at the same time, but let's control that
// timing from the main thread. That's why we have 3 "parties" instead of 2.
final CyclicB...
Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha
...tter: You can use the [A-Z]+ regular expression. If the string contains at least one upper case letter, this regular expression will yield true.
One special character: You can use either the \W which will match any character which is not a letter or a number or else, you can use something like so [!...
Does SQLAlchemy have an equivalent of Django's get_or_create?
...ass the session as argument, it might be better to avoid the commit (or at least use only a flush instead). This leaves session control to the caller of this method and won't risk issuing a premature commit. Also, using one_or_none() instead of first() might be slightly safer.
–...
Cookies on localhost with explicit domain
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By design, domain names must have at least two dots; otherwise the browser will consider them invalid. (See reference on http://curl.haxx.se/rfc/cookie_spec.html)
When working on localhost, the cookie domain must be omitted entirely. Just setting it to "" or N...
INSERT IF NOT EXISTS ELSE UPDATE?
...E SET...
and if you are doing INSERT INTO SELECT ... your select needs at least WHERE true to solve parser ambiguity about the token ON with the join syntax.
Be warned that INSERT OR REPLACE... will delete the record before inserting a new one if it has to replace, which could be bad if you have f...
Return rows in random order [duplicate]
...D(), 1 and you'll get a list of your quotes orderd by the first column (at least in SQL Server 2005).
– Matt Hamilton
Jul 13 '09 at 5:03
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What do Clustered and Non clustered index actually mean?
...e false statements get repeated as gospel. A clustered indicates that, at least from the perspective of sequential reads, it would be "desirable" to have the rows stored physically on disk in the same order as the index, but that's a far cry from saying that it will cause them to actually be stored...
How to start new activity on button click
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#3 is not "pro." It's the least readable and maintainable option, and it will be refactored into #1 or #2 by the first experienced developer who sees it. (Or they'll use Butterknife, which is option #1 on steroids.)
– Kevin Krumw...
Disable autocomplete via CSS
...emember this text-field and will fail to suggest some values.
This is at least the cross browser safe alternative, but I would recommend to go with the answer from RobertsonM (autocomplete="off").
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Require either of two arguments using argparse
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I think you are searching for something like mutual exclusion (at least for the second part of your question).
This way, only foo or bar will be accepted, not both.
import argparse
parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group(required=True)
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