Is there any difference in speed/memory usage for these two equivalent expressions:
Regex.IsMatch(Message, "1000")
Vs
Message.Contains("1000")
Any situations where one is better than other ?
What's the cleanest way of filtering a Python string through an external program? In particular, how do you write the following function?
def filter_through(s, ext_cmd):
# Filters string s through ext_cmd, and returns the result.
# Example usage:
# filter a multiline string through tac to reverse the order.
filter_through("one\ntwo\nthree\n", "tac")
# => returns "three\ntwo\none\n"
Note: the example is only that - I realize there are much better ways of reversing lines in python.
I was going through some previous posts on CONNECT BY usage. What I need to find is that what to do if I want to get all the parents (i.e, up to root) and just one child for a node, say 4.
It seems Like I will have to use union of the following two:-
SELECT *
FROM hierarchy
START WITH id = 4
CONNECT BY id = PRIOR parent
union
SELECT *
FROM hierarchy
WHERE LEVEL =<2
START WITH
id = 4
CONNECT BY
parent = PRIOR id
Is there a better way to do this, some workaround that is more optimized?
Does anybody know a clean PHP-based solution that can backup remote web sites using FTP?
Must haves:
Recursive FTP backups
Possible to run through a cron job
Easy to configure (easy adding of multiple sites)
Local storage of backup files is sufficient
Would be nice:
Backed up sites are stored as zip files
A nice interface to manage things
Provides notification when backup has succeeded or failed
Does incremental backups
Does MySQL Database backups
I need this to be PHP (or Perl) based because it's going to be used on shared hosting packages that do not allow usage of the standard GNU/Linux tools available.
Hello, is it good, that every PHP class implements a Singleton pattern? I think, it will be less memory usage because of it. Is it right opinion? Thanks!
I'm new to T-SQL command MERGE so I found a place in my SQL logic where I can use it and want to test it but can't figure out how exatcly should I use it:
IF (EXISTS (SELECT 1 FROM commissions_history WHERE request = @requestID))
UPDATE commissions_history
SET amount = @amount
WHERE request = @requestID
ELSE
INSERT INTO commissions_history (amount) VALUES @amount)
Plase suggest the proper usage. Thanks!
What is the best way to insert an image programatically into the RichTextBox control in C# Winforms? If the method is using Clipboard then what is the optimized way to keep the Clipboard original data (i.e. the data state before placing my image on the Clipboard) available to be replaced after my temporary usage of Clipboard for inseting my image in Rich Text Box Control.
I've downloaded the "dbd-mysql-0.4.4.zip" and linked it to my project. While I try to run a demo code from NetBeans the very first line
require "dbi"
gives me an error. Is there a different way to do it?
I also tried
jruby setup.rb config --with=dbi,dbd_mysql
from the command prompt and it gave me the following error:
config: unknown option --with=dbi,dbd_mysql
Try 'ruby setup.rb --help' for detailed usage.
Any suggestions please?
I have a bitmap and I want to scale it up to fill an ImageView and overlay the unscaled version of the bitmap on top.
Which would be cheaper (in terms of memory and processor usage)?
Using two ImageViews, one for each version of the bitmap
Using a canvas and drawing on the singular bitmap, using one ImageView
I saw this question about ImageView vs Canvas, but it doesn't address memory/processor concerns. My intuition says two ImageViews may use more RAM, while using a canvas would use more processing power while the drawing occurs.
Why would someone use WHERE 1=1 AND <conditions> in a SQL clause (Either SQL obtained through concatenated strings, either view definition)
I've seen somewhere that this would be used to protect against SQL Injection, but it seems very weird.
If there is injection WHERE 1 = 1 AND injected OR 1=1 would have the same result as injected OR 1=1.
Later edit: What about the usage in a view definition?
Need a simple a way of rounding off an Image. I need the corners to be transparent. This link shows how to do it via command line:
http://www.imagemagick.org/Usage/thumbnails/#rounded
What I need is the corresponding RMagick\Ruby code... Thanks!
Hi:
Is there any alternative to non-ISO gcc specific extension __attribute__ on 64-bit kernels ?
Three types that i've noticed are: function attributes, type attributes and variable attributes.
eg.
i'd like to avoid using __attribute__((__packed__)) for structures passed over the network, even though some gcc based code do use it.
Any suggestions or pointers on how to entirely avoid __attribute__ usage in C systems/kernel code ?
thanks
Saifi.
I am trying to show a .tif image in matlab and I use these two line of codes
a = imread('C:\Users\sepideh\Desktop\21_15.tif');
imshow(a)
that encounters this warning
Warning: Image is too big to fit on screen; displaying at 3%
In imuitools\private\initSize at 73
In imshow at 262
what is the cause of this warning and what can I do to fix that?
the main trouble is it sometimes doesn't show the image and of course even if it shows the image CPU usage gets high that I can't zoom properly
Is loading only the needed classes directly a good way of reducing the overall memory usage of a Java application?
For example:
import java.awt.Graphics;
vs
import java.awt.*;
Hello to all, I'm doing a html text feature extractor in C++; the program need to be REALLY fast: i need to extract a this features in ms per html page and the memory usage needs to be good and finally unicode encoding well be nice.
I know how difficult is to have all of this things, but i want a parser close to these things at least.
Somebody have a suggestion?
hi,
I wanted to have function which will accept as
foo(...)
{
}
usage of this would be
foo(1,2,3);
foo(1)
foo(1,2,3,4,5,5,6);
va_list can be used but again for that I have to pass foo(int count, ...), as this at run time i dont know how many argument i have.
any pointer would be appreciated
Thanks
Hi,
Can someone explain to me the usage of Integer, Boolean etc in place of their primitive types in JAVA?
I can't seem to grasp the advantages their are providing. They seem to create unnecessary problems of handling null values.
Thanks!
In API documentation, and sometimes even used in discussions here on Stack Overflow, I sometimes see the pound (#) character used instead of the dot (.) as the separator between the class name and the method name. For example:
Settings#maxPageSize
I'm wondering what this usage means, and where it comes from?
I'm looking for a JVM profiler (preferably open source) so I can look at the heap and cpu usage of my personal website.
I've used Lambda Probe, and I like it because it provides a web interface for my remote Unix computer that has no display. I was wondering what else is available
Thanks,
Is there a way to include examples for multiple languages (C# and Visual Basic, for example) in XML documentation?
I'm using SandCastle to build MSDN-style documentation and would like to include usage examples for a few .NET languages.
when i made https enabled in secure url and front end secure url usage to yes in magento the checkout page becomes not found. Should i need to do anything more? where i have to place my ssl certificates.
please help me in this
When placing message calls (arrows from one active lifeline to another) in a system sequence diagram in Visio, I noticed that there is a property called "system sequence." Anyone know what the intended usage of this field is?
I am searching a free diff tool with support of native syntax and markup for XAML, but failed to find one. I like Altova's DiffDog but it's paid. CodeCompare is an useful tool. It has some worth with its integration into VisualStudio and usage of native editors. It's a perfect solution for XML! However, it does not support XAML editors. Who can recommend a diff tool for XAML?
Hi, I made an android application with googlemap api, and draw some 16x16 png (about 200 count) on overlay. When I move or zoom on/in mapview, "out of memory" error occurs very often.
I also used the googlemap appication in my htc itself. Seams that it uses about 14+MB memmory, and never happens "out of memory".
How to save memmory usage in a googlemap api, or how to enlarge android api memmory limit.
Thanks a lot!
I have a QML Flickable with 3 QML image elements that cycle through 8 image files. My problem is for each new image it loads into memory it does not release the the unused image. This is causing memory usage to become double what is necessary at times.
I would like to know if there is some function I can use to force it to unload all the unused images? If it makes a difference, this is mainly for Symbian.