Suppose I have some output from a command (such as ls -1):
a
b
c
d
e
...
I want to apply a command (say echo) to each one, in turn. E.g.
echo a
echo b
echo c
echo d
echo e
...
What's the easiest way to do that in bash?
Hi there,
The following always preselects the last option, but i like the first option to be preselected?
<select name="filter">
<option value="" selected>Make a choice</option>
<option value="1">1</option>
<option value="3">3</option>
<option value="7">7</option>
<option value="">all</option>
</select>
even with the first selected??
Can this be done??
Hi!
I want to add some style to head tag in html page using javascript.
var h = document.getElementsByTagName('head').item(0);
h.innerHTML += '<style>a{font-size:100px;}</style>';
But when I run this code in IE8 I see this error message:
Could not set the innerHTML property. Invalid target element for this operation.
Any ideas?
I notice my query doesn't behave correctly if one of the like variables is empty:
SELECT name
FROM employee
WHERE name LIKE '%a%'
AND color LIKE '%A%'
AND city LIKE '%b%'
AND country LIKE '%B%'
AND sport LIKE '%c%'
AND hobby LIKE '%C%'
Now when a and A are not empty it works but when a, A and c are not empty the c part is not excuted so it seems?
How can I fix this?
I need to save thousand of records in a database. I am using CastleProject ActiveRecord. The cycle which stores that amount of objects works too long.
Is it possible to run saving in a batch using ActiveRecord? What is recommended way to improve performance?
I've deployed a SSIS package to my SQL server.
I can run the package fine by connecting to Integration Services in SSMS and right clicking on it and choosing "Run Package"
However, if I schedule the package, it fails.
It tells me to check the logs for information on why, but there is nothing in there...
Any ideas?
(this is my first SSIS package by the way)
I have an analysis that can be parallelized over a different number of processes. It is expected that things will be both IO and CPU intensive (very high throughput short-read DNA alignment if anyone is curious.)
The system running this is a 48 core linux server.
The question is how to determine the optimum number of processes such that total throughput is maximized. At some point the processes will presumably become IO bound such that adding more processes will be of no benefit and possibly detrimental.
Can I tell from standard system monitoring tools when that point has been reached?
Would the output of top (or maybe a different tool) enable me to distinguish between a IO bound and CPU bound process? I am suspicious that a process blocked on IO might still show 100% CPU utilization.
I'm using the latest CKeditor with jQuery adapter.
I have successfully got it to work, and display.
However, as I am completely new to CKeditor, how do I pass in config variables using the jQuery method?
This is what I've got
$( '#input-content' ).ckeditor('', {
toolbar: 'basic'
});
I think from what I've read, the first argument is meant to be a callback, and the 2nd the config. But doing this has not changed the editor at all.
How do I use these config properties etc using the jQuery adapter?
Thanks
Assume I have method
void SomeMethod(Action callback)
This method does some work in background thread and then invokes callback. The question is - how to block current thread until callback is called ?
There is an example
bool finished = false;
SomeMethod(delegate{
finished = true;
});
while(!finished)
Thread.Sleep();
But I'm sure there should be better way
I had VS 11 beta and the following code was working without problem:
let rec fac x y =
if (x = y) then y
elif (x % y = 0I) then fac (x / y) y
else fac x / (y + 1I);;
Now I installed VS 2012 RC and I get the following error:
The type 'System.Numerics.BigInteger -> System.Numerics.BigInteger' is not compatible with the type 'System.Numerics.BigInteger'
Is code not correct or F# interactive? It's F# 3.0.
friends, I have to trouble you as I couldn't find a solution after trying for a long time.
I have 3 columns of data. x, y, and the stress value (S) at every point (x, y). I want to generate a 2D color plot displaying continuous color change with the magnitude of the stress (S). The stress values increase from -3*10^4 Pa to 4*10^4 Pa. I only have hundreds of data sets for an area, but I want to see the stress magnitude (read from the color) at every location (x, y). What Matlab command should I use?
Thank you very much!
I want to make a 2D color plot showing stress magnitude (S) at very loctaion (x, y) based on continuous color change using limited
i have a server application with a richtextbox as the console text basically. The problem is, i have start, restart and stop buttons - But my restart button doesn't work.
Heres my code for the restart button:
consoletxt("RESTART", "Restarting Server...");
statuslabel1.Text = "Restarting";
statuslabel1.ForeColor = Color.Orange;
statuslabel2.Text = "Restarting";
statuslabel2.ForeColor = Color.Orange;
command("stop");
//The performclick just starts the server
startbtn.PerformClick();
statuslabel1.Text = "Online";
statuslabel1.ForeColor = Color.DarkGreen;
statuslabel2.Text = "Online";
statuslabel2.ForeColor = Color.DarkGreen;
consoletxt("RESTART", "Restart completed, server online!");
However, the output is this:
2012-04-01 11:32:12 [RESTART] Restarting Server...
2012-04-01 11:32:12 [RESTART] Restart completed, server online!
2012-04-01 11:32:12 [INFO] CONSOLE: Stopping the server..
2012-04-01 11:32:12 [INFO] Stopping server
So, it says that the restart has finished in the text - but it hasn't - all it has done is stop the server.
Please can sombody explain to me how to do this properly?
Thanks!
This is really a few questions in one, I'm wondering what the performance cost is for these things, as I haven't really been following a best practice of any sort for these. The answers may also be useful to other readers, if somebody knows these.
(1) If I need the core data managed object context, is it bad to use
#import "myAppDelegate.h"
//farther down in the code:
NSManagedObjectContext *context = [(myAppDelegate.h*)[[UIApplication sharedApplication] delegate] managedObjectContext];
as opposed to leaving the warning you get if you don't cast the delegate?
(2) What is the cheapest way to hard-code a string? I have been using
return @"myString";
on occasion in some functions where I need to pass it to a variety of places, is it better to do it this way:
static NSString *str = @"myString";
return str;
(3) How costly is it to subclass an object i wrote vs. making a new one, in general?
(4) When I am using core data and navigating through a hierarchy of some sort, is it necessary to turn things back into faults somehow after I read some info from them? or is this done automatically?
Thanks for any help.
Suppose I have my models set up already.
class books(models.Model):
title = models.CharField...
ISBN = models.Integer...
What if I want to add this column to my table?
user = models.ForeignKey(User, unique=True)
How would I write the raw SQL in my database so that this column works?
I am using the Kohana 3 framework, and am using the native session driver.
For some reason, occasionally the sessions fail to write to their file.
Warning: session_start() [function.session-start]: open(/tmp/sess_*****, O_RDWR) failed: Permission denied (13) in /home/site/public_html/system/classes/kohana/session/native.php on line 27
I am pretty sure Kohana has its own in built error handler, but it is not triggered with this error (i.e. it shows up like a normal PHP error, not the Kohana error).
Anyone that has ever used Kohana will notice this seems to have bypassed Kohana's error handling (perhaps set with set_error_handler()).
Is there anyway to stop this error from appearing without switching from the native session (i.e. file based) driver?
Should I just give good practice the boot and append an @ error suppressor to session_start() in the core code of Kohana? Should I relax the error_reporting()?
Thanks
MYMESSAGE = "<div>Hello</div><p></p>Hello"
send_mail("testing",MYMESSAGE,"[email protected]",['[email protected]'],fail_silently=False)
However, this message doesn't get the HTML mime type when it is sent. In my outlook, I see the code...
Suppose this is my URL route:
(r'^test/?$','hello.life.views.test'),
How do I make it so that people can do .json, .xml, and it would pass a variable to my views.test, so that I know to make json or xml?
How can I select only distinct elements for the XML document using XPATH?I've tried to use the 'distinct-values' function but it didn't work for some reason..
I am building a staff area for a website, which is completely different to the main brochure style site.
I have 2 Kohana systems setup. I realise they can both share the same system and modules folder.
Now, with the second one, I want to make the main template view a view in a different folder.
I tried this in my base controller
$this->template = DOCROOT . '../~new2/application/views/template.php';
But Kohana is looking for it in its own views folder as evident by the error I received. I even put a var_dump(file_exists($this->template)); // true to be sure it was finding the correct file.
Is there a way to add a template file that is not within the views folder, without hacking the core Kohana code (and if I'm lucky not extending and overloading the view class).