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How to prove that a problem is NP complete?
I have problem with scheduling. I need to prove that the problem is NP complete. What can be the methods to prove it NP complete?
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How can I turn a List of Lists into a List in Java 8?
If I have a List<List<Object>> , how can I turn that into a List<Object> that contains all the objects in the same iteration order by using the features of Java 8?
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Python's most efficient way to choose longest string in list?
I have a list of variable length and am trying to find a way to test if the list item currently being evaluated is the longest string contained in the list. And I am using Python 2.6.1
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Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
...matrix).
– ilomambo
May 1 '13 at 14:05
2
I just tested it without the 5th row and the results see...
How can I start PostgreSQL server on Mac OS X?
...t is the result of pg_ctl -D /usr/local/var/postgres status?
Are there any error messages in the server.log?
Make sure tcp localhost connections are enabled in pg_hba.conf:
# IPv4 local connections:
host all all 127.0.0.1/32 trust
Check the listen_addresses and port in postgresql.conf:
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How to do a JUnit assert on a message in a logger
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How do you stop the test from failing if you log an Error?
– Ghilteras
Dec 13 '18 at 1:41
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Convert one date format into another in PHP
..., an invalid date that doesn't exactly match the format will return: Fatal error: Call to a member function format() on a non-object. Just a heads up!
– Rob W
Apr 11 '14 at 13:48
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How to create cron job using PHP?
... php-max-execution-time to be 0 in order to run this forever. Also if some error occurs in your script, it wont execute again until you restart it manually.
– Hassan Raza
Nov 19 '18 at 12:10
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How to group dataframe rows into list in pandas groupby?
I have a pandas data frame df like:
12 Answers
12
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What's the idiomatic syntax for prepending to a short python list?
list.append() is the obvious choice for adding to the end of a list. Here's a reasonable explanation for the missing list.prepend() . Assuming my list is short and performance concerns are negligible, is
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