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Adding 'serial' to existing column in Postgres
... those of us who need to have these Sequences created by a non-interactive script, while patching a live-ish DB for instance.
That is, when you don't wanna SELECT the value manually and type it yourself into a subsequent CREATE statement.
In short, you can not do:
CREATE SEQUENCE foo_a_seq
START...
SVG get text element width
I'm working on some ECMAScript/JavaScript for an SVG file and need to get the width and height of a text element so I can resize a rectangle that surrounds it. In HTML I would be able to use the offsetWidth and offsetHeight attributes on the element but it appears that those properties are...
Scroll to the top of the page using JavaScript?
How do I scroll to the top of the page using a JavaScript? It is desirable even if the scrollbar instantly jumps to the top. I'm not looking for a smooth scrolling.
...
Show data on mouseover of circle
...re:
Basically, all you have to do is to download(index.js), include the script:
<script src="index.js"></script>
and then follow the instructions from here (same link as example)
But for your code, it would be something like:
define the method:
var tip = d3.tip()
.attr('class...
bash: mkvirtualenv: command not found
...cks the $PATH to find virtualenvwrapper.sh and outputs the path to it. The script is then read by the shell via 'source'.
If you want this to happen every time you restart your shell, it's probably better to grab the output from the "which" command first, and then put the "source" line in your shel...
setup cron tab to specific time of during weekdays
...ng to setup a cron job on a Ubuntu server. We want the cron job to run the script at certain times of the day and on some specific days of the week. For example, we want to setup a cron job that runs the script with the following sequence:
...
How do I put an already-running process under nohup?
...to merge these two solutions. Here it is:
For my test I made a small bash script called loop.sh, which prints the pid of itself with a minute sleep in an infinite loop.
$./loop.sh
Now get the PID of this process somehow. Usually ps -C loop.sh is good enough, but it is printed in my case.
Now we...
How to Store Historical Data
...f done with audit tables. It's fairly easy to write a tool that generates scripts to create audit log tables and triggers by reading metadata from the system data dictionary. This type of tool can be used to retrofit audit logging onto most systems. You can also use this subsystem for changed dat...
Pseudo-terminal will not be allocated because stdin is not a terminal
I am trying to write a shell script that creates some directories on a remote server and then uses scp to copy files from my local machine onto the remote. Here's what I have so far:
...
Change default global installation directory for node.js modules in Windows?
...ogramData\npm-cache - npm modules will go here
C:\ProgramData\npm - binary scripts for globally installed modules will go here
C:\ProgramData\npm\node_modules - globally installed modules will go here
set the permissions appropriately
administrators: modify
authenticated users: read/execute
Set ...