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How do RVM and rbenv actually work?
... practical difference between RVM and rbenv is when the version of Ruby is selected.
rbenv:
rbenv adds a shim to the start of your path, a command with the same name as Ruby. When you type ruby at a command line the shim is run instead (because it is also called "ruby" and comes first in the path)...
How can I output UTF-8 from Perl?
...ore or less in utf8, will be output as latin1 by default. This way scripts from a pre-unicode era still work the same, even with a unicode-aware perl.
– mirod
Mar 10 '09 at 10:00
3...
Appropriate hashbang for Node.js scripts
...Packet Radio Node program), then you can use this "two-line shebang" taken from Unix & Linux Stack Exchange:
#!/bin/sh
':' //; exec "$(command -v nodejs || command -v node)" "$0" "$@"
console.log('Hello world!');
but do you really need to do this when almost nobody else in the Node world is?...
Is there a predefined enumeration for Month in the .NET library?
...es = DateTimeFormatInfo.CurrentInfo.MonthNames.Take(12).ToList();
var monthSelectList = monthNames.Select(
m => new { Id = monthNames.IndexOf(m) + 1, Name = m });
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What is non-blocking or asynchronous I/O in Node.js?
...ther hand, fetch is a non-blocking operation as it does not stall alert(3) from execution.
// Blocking: 1,... 2
alert(1);
var value = localStorage.getItem('foo');
alert(2);
// Non-blocking: 1, 3,... 2
alert(1);
fetch('example.com').then(() => alert(2));
alert(3);
Advantages
One advantage of ...
How to select first parent DIV using jQuery?
...
Use .closest() to traverse up the DOM tree up to the specified selector.
var classes = $(this).parent().closest('div').attr('class').split(' '); // this gets the parent classes.
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XAMPP, Apache - Error: Apache shutdown unexpectedly
...- From the XAMPP Control Panel, under Apache, click the Config button, and select the Apache (httpd.conf).
Inside the httpd.conf file, somehow I found a line that says:
Listen 80
And change the 80 into any number / port you want. In my scenario I’m using port 8080.
Listen 8080
Still from th...
Why can't I use an alias in a DELETE statement?
... I was mainly just curious, because I normally use aliases when using SELECT and other such statements, so I instinctively did what I'm used to and was wondering why it didn't work properly.
– Ricardo Altamirano
Jun 12 '12 at 21:38
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What should every developer know about databases? [closed]
...fluence that choice;
The concept of coverage (why you shouldn't just write SELECT *);
The difference between a clustered and non-clustered index;
Why more/bigger indexes are not necessarily better;
Why you should try to avoid wrapping filter columns in functions.
Designers should also be aware of ...
How to determine whether code is running in DEBUG / RELEASE build?
...processor Macros' for debug to ensure that DEBUG is being set - do this by selecting the project and clicking on the build settings tab. Search for DEBUG and look to see if indeed DEBUG is being set.
Pay attention though. You may see DEBUG changed to another variable name such as DEBUG_MODE.
th...