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How to perform .Max() on a property of all objects in a collection and return the object with maximu
...er which finds the maximum value on every iteration (making it O(n^2))
The ordering solution is O(n log n)
Taking the Max value and then finding the first element with that value is O(n), but iterates over the sequence twice. Where possible, you should use LINQ in a single-pass fashion.
It's a lot s...
Regex: Remove lines containing “help”, etc
...gex, I want to delete all lines containing "help" including keyboard_help, etc.
6 Answers
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Does Swift have access modifiers?
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We all know that anything is hackable. We just need some order whats why we need access modifiers
– canbax
Feb 21 '18 at 7:43
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How to reverse a singly linked list using only two pointers?
...st use a doubly linked list if you think you are going to need the reverse order.
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How to get primary key column in Oracle?
...ND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position;
Make sure that 'TABLE_NAME' is in upper case since Oracle stores table names in upper case.
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Java 8 Distinct by property
...ream().filter(distinctByKey(Person::getName))
Note that if the stream is ordered and is run in parallel, this will preserve an arbitrary element from among the duplicates, instead of the first one, as distinct() does.
(This is essentially the same as my answer to this question: Java Lambda Stream...
How to return result of a SELECT inside a function in PostgreSQL?
...pe = 'ALPHABETIC'
LIMIT _max_tokens
) t
GROUP BY t.txt
ORDER BY cnt DESC; -- potential ambiguity
END
$func$ LANGUAGE plpgsql;
Call:
SELECT * FROM word_frequency(123);
Explanation:
It is much more practical to explicitly define the return type than sim...
How to force R to use a specified factor level as reference in a regression?
...level() command is a shorthand method to your question. What it does is reorder the factor so that whatever is the ref level is first. Therefore, reordering your factor levels will also have the same effect but gives you more control. Perhaps you wanted to have levels 3,4,0,1,2. In that case...
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SQL Server add auto increment primary key to existing table
... I would like to start counting at 1000. I suspect I can use ALTER TABLE ORDER ALTER COLUMN ORDERNO RESTART WITH 1 but I didn't want to try it without checking with an expert :) Ref. pic.dhe.ibm.com/infocenter/iseries/v7r1m0/…
– user1477388
Mar 8 '13 at 1...
How to normalize an array in NumPy?
...iving optimal performance.
import numpy as np
def normalized(a, axis=-1, order=2):
l2 = np.atleast_1d(np.linalg.norm(a, order, axis))
l2[l2==0] = 1
return a / np.expand_dims(l2, axis)
A = np.random.randn(3,3,3)
print(normalized(A,0))
print(normalized(A,1))
print(normalized(A,2))
prin...