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Difference between HashSet and HashMap?
... does not allow duplicate values, what is the difference between HashMap and HashSet ?
19 Answers
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How many random elements before MD5 produces collisions?
... quintillion 374 quadrillion 607 trillion 431 billion 768 million 211 thousand 456.
However if you keep all the hashes then the probability is a bit higher thanks to birthday paradox. To have a 50% chance of any hash colliding with any other hash you need 264 hashes. This means that to get a collis...
How can I multiply and divide using only bit shifting and adding?
How can I multiply and divide using only bit shifting and adding?
14 Answers
14
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How do you loop in a Windows batch file?
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FOR %%A IN (list) DO command parameters
list is a list of any elements, separated by either spaces, commas or semicolons.
command can be any internal or external command, batch file or even - in OS/2 and NT - a list of commands
parameters ...
Can I replace groups in Java regex?
I have this code, and I want to know, if I can replace only groups (not all pattern) in Java regex.
Code:
7 Answers
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Skip List vs. Binary Search Tree
...node need to be locked.
Update from Jon Harrops comments
I read Fraser and Harris's latest paper Concurrent programming without locks. Really good stuff if you're interested in lock-free data structures. The paper focuses on Transactional Memory and a theoretical operation multiword-compare-an...
How to get the sizes of the tables of a MySQL database?
...n MB`
FROM information_schema.TABLES
WHERE table_schema = "$DB_NAME"
AND table_name = "$TABLE_NAME";
or this query to list the size of every table in every database, largest first:
SELECT
table_schema as `Database`,
table_name AS `Table`,
round(((data_length + index_length...
Get name of property as a string
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I just tried it with both instance and static properties. So far so good.
– Jim C
May 12 '10 at 16:50
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Django : How can I see a list of urlpatterns?
...r settings like this:
INSTALLED_APPS = (
...
'django_extensions',
...
)
And then, run this command in your terminal
./manage.py show_urls
For more information you can check the documentation.
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Realistic usage of the C99 'restrict' keyword?
I was browsing through some documentation and questions/answers and saw it mentioned. I read a brief description, stating that it would be basically a promise from the programmer that the pointer won't be used to point somewhere else.
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