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C# Sort and OrderBy comparison
...0ms
In this scenario it looks like OrderBy performs better.
UPDATE2:
And using random names:
List<Person> persons = new List<Person>();
for (int i = 0; i < 100000; i++)
{
persons.Add(new Person("P" + i.ToString(), RandomString(5, true)));
}
Where:
private static Random r...
How to calculate the difference between two dates using PHP?
...s answer below
You can use strtotime() to convert two dates to unix time and then calculate the number of seconds between them. From this it's rather easy to calculate different time periods.
$date1 = "2007-03-24";
$date2 = "2009-06-26";
$diff = abs(strtotime($date2) - strtotime($date1));
$year...
Python matplotlib multiple bars
...lotlib, when I tried to call the bar function multiple times, they overlap and as seen the below figure the highest value red can be seen only.
How can I plot the multiple bars with dates on the x-axes?
...
What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
6 Answers
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Data structure for loaded dice?
...e. for a fixed set of probabilities) so that I can efficiently simulate a random roll of the die.
4 Answers
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Which SQL query is faster? Filter on Join criteria or Where clause?
...
Performance-wise, they are the same (and produce the same plans)
Logically, you should make the operation that still has sense if you replace INNER JOIN with a LEFT JOIN.
In your very case this will look like this:
SELECT *
FROM TableA a
LEFT JOIN
...
How to make link look like a button?
...ide a tag won't work? :( I'm using Firefox 27. I also tried a.button {...} and it doesn't work either.
– just_a_girl
Feb 26 '14 at 0:51
4
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Why do we need fibers
...<Enumerator: 1:upto(10)>
These Enumerators are Enumerable objects, and their each methods yield the elements which would have been yielded by the original iterator method, had it been called with a block. In the example I just gave, the Enumerator returned by reverse_each has a each method w...
Python: Tuples/dictionaries as keys, select, sort
...ferent colors, e.g., 24 blue bananas, 12 green apples, 0 blue strawberries and so on.
I'd like to organize them in a data structure in Python that allows for easy selection and sorting. My idea was to put them into a dictionary with tuples as keys, e.g.,
...
Using sed and grep/egrep to search and replace
...
Use this command:
egrep -lRZ "\.jpg|\.png|\.gif" . \
| xargs -0 -l sed -i -e 's/\.jpg\|\.gif\|\.png/.bmp/g'
egrep: find matching lines using extended regular expressions
-l: only list matching filenames
-R: search recursively th...