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The Concept of 'Hold space' and 'Pattern space' in sed
...irst command is not executed; h copies the first line into the hold space.
now the second line replaces whatever was in the pattern space
on the second line, first we execute G, appending the contents of the hold buffer to the pattern buffer, separating it by a newline. The pattern space now contain...
Sorting multiple keys with Unix sort
...
Whoops! Now I have to fix a script because earlier I only saw the first answer above...good thing I haven't depended on the script output yet....
– Wildcard
Nov 5 '15 at 6:22
...
Are PHP functions case sensitive?
... . '.php';
if (file_exists($filename)) {
require($filename);
}
}
Now with this code:
$a = new something(); // works
$b = new SomeThing(); // does not work
$c = new SOMETHING(); // does not work
You may made this work (ie. having effectively case insensitive class names using an autoload...
Eclipse IDE for Java - Full Dark Theme
... When Eclipse 3.0 shipped in 2004 it brought a new look to the workbench. Now, 10 years later, an entirely new Dark Theme is launching.
The theme extends to more than just the Widgets. Syntax highlighting has also been improved to take advantage of the new look.
The What's new page mentions:...
How do I create a slug in Django?
...
utf-8 is now handled correctly by slugify (in django 1.8.5)
– Rick Westera
Nov 20 '15 at 23:53
...
How do I update/upsert a document in Mongoose?
...
Mongoose now supports this natively with findOneAndUpdate (calls MongoDB findAndModify).
The upsert = true option creates the object if it doesn't exist. defaults to false.
var query = {'username': req.user.username};
req.newData.u...
Computed / calculated / virtual / derived columns in PostgreSQL
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The functionality is in development right now: commitfest.postgresql.org/16/1443
– r90t
Jan 23 '18 at 12:42
1
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is there an virtual environment for node.js?
...
Tested and confirmed now. npm install replaced npm bundle as of NPM 1.0, I believe.
– Marnen Laibow-Koser
Feb 11 '12 at 19:01
...
Cast List to List
...uit.Add(new Banana());
// Eek - it's a banana!
Apple apple = apples[0];
Now you can convert a List<Apple> to an IEnumerable<IFruit> in .NET 4 / C# 4 due to covariance, but if you want a List<IFruit> you'd have to create a new list. For example:
// In .NET 4, using the covarianc...
Eclipse says: “Workspace in use or cannot be created, chose a different one.” How do I unlock a work
...
Thanks Boris! Not the right place, but I have to rant now.. Why doesn't Eclipse give an option to delete the .lock file or even hint at its existence? What self-respecting IDE can't have multiple instances running in the same workspace anyway? If deleting the .lock file is the o...