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bash HISTSIZE vs. HISTFILESIZE?
...tappend is not enabled, commands 41 to 50 are saved to your HISTFILE which now has the 10 commands it held at the beginning plus the 10 newly written commands.
Your HISTFILE is truncated to contain HISTFILESIZE=10 lines.
You now have 10 commands in your history - the last 10 that you just typed in ...
What is the correct way to start a mongod service on linux / OS X?
... been able to run it, work with it, do simple DB read / write type stuff. Now I'm trying to set up my Mac to run mongod as a service.
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Calculate relative time in C#
... 24 * HOUR;
const int MONTH = 30 * DAY;
var ts = new TimeSpan(DateTime.UtcNow.Ticks - yourDate.Ticks);
double delta = Math.Abs(ts.TotalSeconds);
if (delta < 1 * MINUTE)
return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";
if (delta < 2 * MINUTE)
return "a minute ago"...
Convert ArrayList to String[] array [duplicate]
... To provide an explanation as to what is going on here, the JVM doesn't know how to blindly downcast Object[] (the result of toArray()) to String[]. To let it know what your desired object type is, you can pass a typed array into toArray(). The typed array can be of any size (new String[1] is vali...
How to change XAMPP apache server port?
...e Configuration of Control Panel
Restart the Apache Server
It should work now.
4.1. Web browser configuration
If this configuration isn't hiding port number in URL it's because your web browser is not configured for. See : Tools ► Options ► General ► Connection Settings... will allow you t...
Rails: FATAL - Peer authentication failed for user (PG::Error)
...s=# create database "dcaclab_development" owner "guy_on_stackoverflow";
Now update your database.yml file after you've confirmed creating the database, user, password and set these privileges. Don't forget host: localhost.
...
Simpler way to put PDB breakpoints in Python code?
... whatever other languages you use.
2019 Update (Python 3.7+)
Python 3.7+ now has the builtin breakpoint() which can replace the previous import pdb; pdb.set_trace() in vim. It still works the same.
share
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Visual Studio Copy Project
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This is incredibly useful, how did I not know about this before? Thanks!
– Aldarrion
Jan 8 '18 at 17:23
5
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Easily measure elapsed time
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std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
std::cout << "Time difference = " << std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count() << ...
subtle differences between JavaScript and Lua [closed]
...me more differences:
Lua has native support for coroutines.
UPDATE: JS now contains the yield keyword inside generators, giving it support for coroutines.
Lua doesn't convert between types for any comparison operators. In JS, only === and !== don't type juggle.
Lua has an exponentiation operato...