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  • Should I write more SQL to be more efficient, or less SQL to be less buggy?

    - by RenderIn
    I've been writing a lot of one-off SQL queries to return exactly what a certain page needs and no more. I could reuse existing queries and issue a number of SQL requests linear to the number of records on the page. As an example, I have a query to return People and a query to return Job Details for a person. To return a list of people with their job details I could query once for people and then once for each person to retrieve their job details. I've found that in most cases that solution returns things in a reasonable amount of time, but I don't know how well it will scale in my environment. Instead I've been writing queries to join people + job details, or people + salary history, etc. I'm looking at my models and I see how I could shave off maybe 30% of my code if I were to re-use existing queries. This is a big temptation. Is it a bad thing to go for reuse over efficiency in general or does it all come down to the specific situation? Should I first do it the easy way and then optimize later, or is it best to get the code knocked out while everything is fresh in my mind? Thoughts, experiences?

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  • Gathering buslogic SCSI hardware and virtual machine operating system

    - by Julian
    I'm trying to use Powershell to get SCSI hardware from several virtual servers and get the operating system of each specific server. I've managed to get the specific SCSI hardware that I want to find with my code, however I'm unable to figure out how to properly get the operating system of each of the servers. Also, I'm trying to send all the data that I find into a csv log file, however I'm unsure of how you can make a powershell script create multiple columns. Here is my code (almost works but something's wrong): $log = "C:\Users\me\Documents\Scripts\ScsiLog.csv" Get-VM | Foreach-Object { $vm = $_ Get-ScsiController -VM $vm | Where-Object { $_.Type -eq "VirtualBusLogic" } | Foreach-Object { get-VMGuest -VM $vm } | Foreach-Object{ Write-output $vm.Guest.VmName >> $log } } I don't receive any errors when I run this code however whenever I run it I'm only getting the name of the servers and not the OS. Also I'm not sure what I need to do to make the OS appear in a different column from the name of the server in the csv log that I'm creating. What do I need to change in my code to get the OS version of each virtual machine and output it in a different column in my csv log file? EDIT: Here's a more in depth look at things I've tried that have all failed: Get-VM | Foreach-Object { $vm = $_ $svm = Get-ScsiController -VM $vm | Where-Object { $_.Type -eq "VirtualBusLogic" } Foreach-Object {get-VMGuest -VM $svm } | Foreach-Object{Write-output $svm >> $log} } #Get-VM | Foreach-Object { # $vm = $_ # Get-ScsiController -VM $vm | Where-Object { $_.Type -eq "VirtualBusLogic"} #| write-host $vm # | Foreach-Object { # # #get-VMGuest -VM $_ | # #write-host $vm # #get-VMGuest -VM $vm } | Foreach-Object{ # #write-output $vm.VmName >> $log # #write-output $vm.guest.VmName, get-VmGuest -VM $vm >> $log NO GOOD # # Write-host $vm.Guest.VmName #+ get-vmGuest -vm $VM >> $log # # # } # } I'm not sure why get-VmGuest fails though. I'm getting the scsi hardware, filtering the hardware to only get buslogic, and then wanting to get the operating system of just the filtered VMs. I don't see where my code fails though.

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  • How to read information from .3gp and .mp4 using ffmpeg-php?

    - by Neltharian
    I have a bit of a problem with ffmpeg-php. I'm trying to get some information from video files and it works pretty fine with file formats like .avi, .mpg or .flv but when I try to use .3gp or .mp4 in: $movie = new ffmpeg_movie('path/to/file/test.3gp'); I get error like this : ffmpeg_movie::__construct() []: ISO: File Type Major Brand: 3gp5 or ffmpeg_movie::__construct() []: ISO: File Type Major Brand: mp42 I installed ffmpeg-php on WAMP using instructions found here: http://stackoverflow.com/questions/1172916/how-to-install-ffmpeg-in-wampserver-2-0-windows-xp I need those information to send them to ffmpeg using exec(). Anyone could help me with this?

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  • What languages should a microISV use to write commercial software?

    - by Wal
    I've been writing software in Java for many years now, but it was always for internal applications that would be deployed to a server. I'd like to get into writing desktop applications now but I don't know where to start. I've written a few Java/Swing applications but again they were for internal use. My understanding is that Java and other semi-compiled and interpreted languages are too easy to reverse engineer, making them unsuitable for commercial software. I am aware that there are compilers for Java and some other interpreted language, but I've also heard that they are pricey and/or unreliable. Assuming I start a microISV and wish to develop and sell applications to a broad audience, what's my best bet? I would prefer something that can be written close to once, and compiled for different operating systems but I am not opposed to .NET and a Windows-only audience if other languages would compromise the experience (installation ease & user experience) in Windows. My only issue there is that I don't have a large starting budget and paying out the wazoo for the required development tools is not really in the cards.

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  • How do I read the cache of Chrome and Firefox programmatically on the Mac?

    - by John Gallagher
    Background I want to access the cache of Chrome and Firefox in my Cocoa application. I need to get the HTML for pages accessed recently. Safari is a piece of cake - all this information is available in SQLite data stores, but not so in Chrome and Firefox. The Problem For Firefox, the cache is in /Library/Caches/Firefox/Profiles/xxx.default/Cache with filenames _CACHE_001_ _CACHE_002_ _CACHE_003_ and _CACHE_MAP_ For Chrome, the cache is in /Library/Caches/Google/Chrome/Default/Cache with filenames data_0 data_1 data_2 and data_3 What I've tried The only article I can find that sheds any light on what format these caches are in is here. It recommends a Cache Viewer tool, but doesn't explain how one might do this programmatically. Questions Is there any way of reconstructing this data using command line tools or the Cocoa framework? Or is it much too low level? Is there another way of getting at the HTML of recent web pages that I don't know about?

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  • How can I save and read to XML the new C++ style matrix objects in OpenCV?

    - by neuviemeporte
    The old, C style cvMat matrices could be passed to the cvSave() function for easy writing to an XML file. The new C++ style cv::Mat and cv::Mat_ matrices are not accepted by this function. The OpenCV reference has a section on XML persistence, but the three classes (FileStorage, FileNode and FileNodeIterator) lack any description or example and I can't figure out how to use them from the interface. Thanks.

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  • Are there cross-platform tools to write XSS attacks directly to the database?

    - by Joachim Sauer
    I've recently found this blog entry on a tool that writes XSS attacks directly to the database. It looks like a terribly good way to scan an application for weaknesses in my applications. I've tried to run it on Mono, since my development platform is Linux. Unfortunately it crashes with a System.ArgumentNullException deep inside Microsoft.Practices.EnterpriseLibrary and I seem to be unable to find sufficient information about the software (it seems to be a single-shot project, with no homepage and no further development). Is anyone aware of a similar tool? Preferably it should be: cross-platform (Java, Python, .NET/Mono, even cross-platform C is ok) open source (I really like being able to audit my security tools) able to talk to a wide range of DB products (the big ones are most important: MySQL, Oracle, SQL Server, ...)

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  • Is There a More Efficient Way to Write Nested While Loops?

    - by Ryan
    The code below shows nested while loops, but it's not the very efficient. Suppose I wanted to extend the code to include 100 nested while loops. Is there a better way to accomplish this task? <?php $count = 1; $num = 1; $options=3; while ( $num <=$options ) { echo "(".$num . ") "; $num1 = 1; $options1=3; while ( $num1 <=$options1 ) { echo "*".$num1 . "* "; $num2 = 1; $options2=3; while ( $num2 <=$options2 ) { echo "@".$num2 . "@ "; $num3 = 1; $options3=3; while ( $num3 <=$options3 ) { echo $num3 . " "; $num3++; $count++; } echo "<br />"; $num2++; } echo "<br />"; $num1++; } echo "<br />"; $num++; } echo $count; ?>

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  • Python unittest (using SQLAlchemy) does not write/update database?

    - by Jerry
    Hi, I am puzzled at why my Python unittest runs perfectly fine without actually updating the database. I can even see the SQL statements from SQLAlchemy and step through the newly created user object's email -- ...INFO sqlalchemy.engine.base.Engine.0x...954c INSERT INTO users (user_id, user_name, email, ...) VALUES (%(user_id)s, %(user_name)s, %(email)s, ...) ...INFO sqlalchemy.engine.base.Engine.0x...954c {'user_id': u'4cfdafe3f46544e1b4ad0c7fccdbe24a', 'email': u'[email protected]', ...} > .../tests/unit_tests/test_signup.py(127)test_signup_success() -> user = user_q.filter_by(user_name='test').first() (Pdb) n ...INFO sqlalchemy.engine.base.Engine.0x...954c SELECT users.user_id AS users_user_id, ... FROM users WHERE users.user_name = %(user_name_1)s LIMIT 1 OFFSET 0 ...INFO sqlalchemy.engine.base.Engine.0x...954c {'user_name_1': 'test'} > .../tests/unit_tests/test_signup.py(128)test_signup_success() -> self.assertTrue(isinstance(user, model.User)) (Pdb) user <pweb.models.User object at 0x9c95b0c> (Pdb) user.email u'[email protected]' Yet at the same time when I login to the test database, I do not see the new record there. Is it some feature from Python/unittest/SQLAlchemy/Pyramid/PostgreSQL that I'm totally unaware of? Thanks. Jerry

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  • How should I write this string-prefix check so that it's idiomatic Python?

    - by Kevin Stargel
    I have a couple of lists of items: specials = ['apple', 'banana', 'cherry', ...] smoothies = ['banana-apple', 'mocha mango', ...] I want to make a new list, special_smoothies, consisting of elements in smoothies that start with the elements in specials. However, if specials is blank, special_smoothies should be identical to smoothies. What's the most Pythonic way to do this? Is there a way to do this without a separate conditional check on whether specials is blank?

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  • JavaScript method to write to Microsoft Visual Web Developer Debugger?

    - by Josh
    I generally test my web apps with Firefox and use Firebug. I love Firebug. But when I'm testing JavaScript code in IE I use the debugger in Microsoft's Visual Web Developer 2008 Express Edition. I would love to have an equivalent to Firebug's console.log methods which would allow me to log messages to Visual Web Developer. Any way to log messages to the error list/messages list/output pane using JavaScript?

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  • I can't read the value from a radio button.

    - by Corey
    <html> <head> <title>Tip Calculator</title> <script type="text/javascript"><!-- function calculateBill(){ var check = document.getElementById("check").value; /* I try to get the value selected */ var tipPercent = document.getElementById("tipPercent").value; /* But it always returns the value 15 */ var tip = check * (tipPercent / 100) var bill = 1 * check + tip; document.getElementById('bill').innerHTML = bill; } --></script> </head> <body> <h1 style="text-align:center">Tip Calculator</h1> <form id="f1" name="f1"> Average Sevice: 15%<input type="radio" id="tipPercent" name="tipPercent" value="15" /> <br /> Excellent Sevice: 20%<input type="radio" id="tipPercent" name="tipPercent" value="20" /> <br /><br /> <label>Check Amount</label> <input type="text" id="check" size="10" /> <input type="button" onclick="calculateBill()" value="Calculate" /> </form> <br /> Total Bill: <p id="bill"></p> </body> </html>

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  • When to alter a function vs when to just write a new one...?

    - by Andrew Heath
    /is n00b Through the gift of knowledge and expertise encoded here, I am doing my best to avoid n00b mistakes as I learn the basics of programming. I use functions when I (think I) can in PHP, and keep them somewhat sorted in different includes. The n00b problem I'm running into now is situations where perhaps 4/5th of an existing function is relevant to a new need. Maybe there are a slightly different set of inputs, or an additional calculation or two in the series, or output needs a different format/structure... but the core of the function is still applicable. Is there a good rule of thumb regarding when one should bolt-on crap to an original function and when one should (literally) copy & paste most of it into a new function and tweak to fit the situation? On the one hand I feel bad duping code, on the other I feel bad cluttering up an existing function with stuff not always needed...

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  • Howto write a class where a property can be accessed without naming it.

    - by SchlaWiener
    I have a (dump) question regarding VB/C# I often use third party classes where I can access a child object with only specifying the id or key. Example: Instead of writing: DataRow row = GetAPopulatedDataRowSomeWhere(); Object result = row.Items[1]; // DataRow has no Items property Object result = row.Items["colName"]; // Also not possible I use this code to access the members: DataRow row = GetAPopulatedDataRowSomeWhere(); Object result = row[1]; Object result = row["colName"]; Can someone tell me how a class has to look like to support this syntax? My own class has a Dictionary that I want to access this way. MyClass["key"]; // <- that's what I want MyClass.SubItems["key"]; // <- that's how I use it now

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  • How can I use an SSH tunnel for all traffic from a single application, without knowing the ports used?

    - by Matthew Read
    I have an application that opens connections on dozens of ports, and doesn't provide documentation about which ports it uses. I could use Wireshark or something to capture the traffic and export the ports from that, but I think it should be simpler than that. (And I'm not sure I would be able to cover all use cases and ensure the app used every single port it can ever use.) So I'm looking for a way to just say "forward all traffic from this application" (bonus points for all traffic from child processes as well) without needing to worry about specific ports. I'm sure there must be a way, but I couldn't hit on the right keywords while searching Google. How can I do this?

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  • Grails - How to format a value in a textfield into comma style such that it can be easily read?

    - by WaZ
    Hi there, I want to allow users enter numbers in textfield and once the textbox loses focus. The number is formatted with commas. e.g. User enters 100000 textfield looses focus value displayed: 100,000 How can I achieve this in Grails. I have looked at <g:formatNumber number="${myNumber}" format="\\$###,##0" /> But it doesnt solve my problem as the number is from a textfield. thanks Much appreciated.

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