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How to list running screen sessions?
...ntle ~ # ls -laR /var/run/screen/
/var/run/screen/:
total 1
drwxrwxr-x 4 root utmp 96 Mar 1 2005 .
drwxr-xr-x 10 root root 840 Feb 1 03:10 ..
drwx------ 2 josh users 88 Jan 13 11:33 S-josh
drwx------ 2 root root 48 Feb 11 10:50 S-root
/var/run/screen/S-josh:
total 0
drwx------ 2 josh u...
Ruby on Rails: how do I sort with two columns using ActiveRecord?
...
Assuming you're using MySQL,
Model.all(:order => 'DATE(updated_at), price')
Note the distinction from the other answers. The updated_at column will be a full timestamp, so if you want to sort based on the day it was updated, you need to use ...
is there a css hack for safari only NOT chrome?
...13 (early-2020):
/* Safari 7.1+ */
_::-webkit-full-page-media, _:future, :root .safari_only {
color:#0000FF;
background-color:#CCCCCC;
}
To cover more versions, 6.1 and up, at this time you have to use the next pair of css hacks. The one for 6.1-10.0 to go with one that handles 10.1 and up...
How do I change the root directory of an apache server? [closed]
Does anyone know how to change the document root of the Apache server? I basically want localhost to come from /users/spencer/projects directory instead of /var/www .
...
Should I use != or for not equal in T-SQL?
...ages) and <> (ANSI).
Databases that support both != and <>:
MySQL 5.1: != and <>
PostgreSQL 8.3: != and <>
SQLite: != and <>
Oracle 10g: != and <>
Microsoft SQL Server 2000/2005/2008/2012/2016: != and <>
IBM Informix Dynamic Server 10: != and <>
Int...
insert a NOT NULL column to an existing table
...crosoft SQL server. If you want to perform the same operation on Oracle or MySQL you need to use semicolon ; like that:
ALTER TABLE MY_TABLE ADD STAGE INT NULL;
UPDATE MY_TABLE SET <a valid not null values for your column>;
ALTER TABLE MY_TABLE ALTER COLUMN STAGE INT NOT NULL;
...
Javascript objects: get parent [duplicate]
...t the same problem.
I have a structure like this:
var structure = {
"root":{
"name":"Main Level",
nodes:{
"node1":{
"name":"Node 1"
},
"node2":{
"name":"Node 2"
},
"node3":{
...
Python set to list
..., 'pop', 'remove', 'symmetric_difference', 'symmetric_difference_update', 'union', 'update'] (removed __ because of char limit)
– user825286
Jul 26 '11 at 10:48
...
What is the difference between trie and radix trie data structures?
... "smiled", "smiles" and "smiling" using the following static assignments:
root['s']['m']['i']['l']['e']['\0'] = smile_item;
root['s']['m']['i']['l']['e']['d']['\0'] = smiled_item;
root['s']['m']['i']['l']['e']['s']['\0'] = smiles_item;
root['s']['m']['i']['l']['i']['n']['g']['\0'] = smiling_item;
...
/etc/apt/sources.list" E212: Can't open file for writing
...
That happens to me all the time, I open a root file for writing:
Instead of losing all your changes and re-opening with sudo. See this demo of how to save those changes:
One time Setup demo to create a root owned read only file for a lower user:
sudo touch temp.t...