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Why doesn't Dijkstra's algorithm work for negative weight edges?
... the "closed" nodes is indeed minimal, and thus the node that will next be selected is also minimal.
The idea of it is: If we have a vertex in open such that its cost is minimal - by adding any positive number to any vertex - the minimality will never change.
Without the constraint on positive numb...
CSS: bolding some text without changing its container's size
...e widths to be defined by the width of the menu item. I bold the currently-selected item.
11 Answers
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SQLAlchemy: Creating vs. Reusing a Session
...nging around in that Session, when you access them you'll get a single-row SELECT for each one of them as they each individually refresh their state in terms of the new transaction.
– zzzeek
Sep 27 '15 at 18:16
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Why use argparse rather than optparse?
... defining arguments. (My source recommends: Why Click)
python-inquirer For selection focused tools and based on Inquirer.js (repo)
If you need a more in-depth comparison please read this and you may end up using docopt or click. Thanks to Kyle Purdon!
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What is the most accurate way to retrieve a user's correct IP address in PHP?
...and anonymous proxy servers is just something I'll have to deal with for a select group of individuals.
– Corey Ballou
Oct 28 '09 at 10:04
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...y the System Preferences Java Control Panel doesn't just present a list to select from, rather than have to resort to shell scripts/commands. I suspect this is just for Applets that run in the browser...
– JGFMK
Aug 14 '14 at 17:56
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Are soft deletes a good idea? [duplicate]
... is RIGHT
4) The complexities of soft delete never ever stops at a simple select.
A) Suppose you had a UNIQUE constraint. Now you soft-delete a row but the column with UNIQUE constraint is still there. When you want to add the same data back in, you cannot do that without additional "tricks".
B...
Why do some functions have underscores “__” before and after the function name?
...ml",
title = _("Title"),
data = self.application.db.query("select ... where object_id=%s", self.object_id)
)
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Display open transactions in MySQL
... the current transaction list in InnoDB with the query below if you want.
SELECT * FROM information_schema.innodb_trx\G
From the document:
The INNODB_TRX table contains information about every transaction (excluding read-only transactions) currently executing inside InnoDB, including whether t...
Running a cron every 30 seconds
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superb answer, should be the selected answer
– GuidedHacking
Feb 21 at 16:42
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