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Why do we check up to the square root of a prime number to determine if it is prime?
To test whether a number is prime or not, why do we have to test whether it is divisible only up to the square root of that number?
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Is there a (repeat-last-command) in Emacs?
Frequently, I've dug into apropos and docs looking for something like the following only to give up to get back to the task at hand:
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The first day of the current month in php using date_modify as DateTime object
I can get the Monday of this week with:
11 Answers
11
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How can I convert comma separated string into a List
This doesn't work cause the split method returns a string[]
11 Answers
11
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How to find the last day of the month from date?
How can I get the last day of the month in PHP?
28 Answers
28
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How to have an automatic timestamp in SQLite?
I have an SQLite database, version 3 and I am using C# to create an application that uses this database.
7 Answers
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Increase heap size in Java
I am working on a Windows 2003 server (64-bit) with 8 GB RAM. How can I increase the heap memory maximum? I am using the -Xmx1500m flag to increase the heap size to 1500 Mb. Can I increase the heap memory to 75% of physical memory (6 GB Heap)?
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Adding minutes to date time in PHP
I'm really stuck with adding X minutes to a datetime, after doing lots of google'ing and PHP manual reading, I don't seem to be getting anywhere.
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Git add and commit in one command
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You can use git aliases, e.g.
git config --global alias.add-commit '!git add -A && git commit'
and use it with
git add-commit -m 'My commit message'
EDIT: Reverted back to ticks ('), as otherwise it will fail for shell expansion on Linux. On Windows, one should use double-quo...
How do I convert seconds to hours, minutes and seconds?
I have a function that returns information in seconds, but I need to store that information in hours:minutes:seconds.
12 An...