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• Rails: ruby script/generate model, where are the docs?

  - by yar

  I am running ruby script/generate scaffold or ruby script/generate model and I know the basic syntax, like ruby script/generate scaffold Dude name:string face:boolean but I do not know things like: should names of variables have underscores or be camelCased? what kind of variable types are acceptable? Where can I find such information? THANKS! P.S. The answers to my two questions would help for now, too :)

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• What's wrong with this UPDATE FROM using a case statement?

  - by Blankman

  update p set p.storePrice = CASE WHEN p.costPrice BETWEEN 0.00 AND 1.00 THEN p.costPrice * 1.0 CASE WHEN p.costPrice BETWEEN 0.00 AND 1.00 THEN p.costPrice * 1.0 ELSE p.msrpPrice END FROM product p WHERE p.type = 1 The error says: Msg 156, Level 15, State 1, Line 9 Incorrect syntax near the keyword 'CASE'. I can't seem to see any issue with the sql?

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• Fixing Combinatorica redefinition of Element

  - by Yaroslav Bulatov

  My code relies on version of Element which works like MemberQ, but when I load Combinatorica, Element gets redefined to work like Part. What is the easiest way to fix this conflict? Specifically, what is the syntax to remove Combinatorica's definition from DownValues? Here's what I get for DownValues[Element] {HoldPattern[ Combinatorica`Private`a_List \[Element] \ {Combinatorica`Private`index___}] :> Combinatorica`Private`a[[Combinatorica`Private`index]], HoldPattern[Private`x_ \[Element] Private`list_List] :> MemberQ[Private`list, Private`x]}

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• Is there a pure HTML5 emacs mode?

  - by Marcelo Santos

  Question http://stackoverflow.com/questions/1082474/authoring-html5-in-emacs talks about nxml-mode but, from what I read, that can only be used for XHTML5, I want to use emacs with HTML5 (no XML syntax). Is there any mode with auto-indentation, tag/attribute completion, etc.?

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• python print end=' '

  - by Hath

  i have this python script where i need to run 'gdal_retile.py' but i get this an exception on this line: if Verbose: print(Building internam Index for %d tile(s) ..." % len(inputTiles), end=' ') the end='' is invalid syntax just curious as to why.. and what the author probably meant to do. I'm new to python if you haven't already guessed.

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• apex button to call a page in another application

  - by jaykio77

  I have a workspace with which I have 5 applications based on same schema. Now I want to have a main page from where I could call main pages of all these applications. I used this syntax to call home page in another application but to no avail f?p=4000:4150:&APP_SESSION. Where 4000:4150 are the values for the application and the page I want to display. Please let me know where am I making mistake.

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• in jQuery, why are we using this ({ })

  - by uzay95

  I wonder that, why are we using ({ }) ? Is it delegate ? What does it mean to use this syntax ? What are we wrapping with it ? For ex: $.ajaxSetup ({ // <-- THIS error: fError, compelete: fComp, success: fSucc }); // <-- AND THIS

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• test remote file if directory

  - by soField

  HOSTNAME=$1 #missing files will be created by chk_dir for i in `cat filesordirectorieslist_of_remoteserver` do isdir=remsh $HOSTNAME "if [ -d $i ]; then echo dir; else echo file; fi" if [ $isdir -eq "dir" ] then remsh $HOSTNAME "ls -d $i | cpio -o" | cpio -id else remsh $HOSTNAME "ls | cpio -o" | cpio -id fi done i need simple solution for checking remote file is directory or file ? thanks

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• lua - how to call function from above it in code (prior to it being defined)?

  - by Greg

  what is the syntax (i.e. code example) in Lua so you can call a function prior to it being defined? i.e. how do you kind of create the function, but then add it's implementation further down in code. So roughly like this: define function name (doX) here somehow (i.e. subject of this question) call doX here (further down in the code) doX implemention here (i.e. all functions down at the bottom of the file)

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• XCode: Function argument indentation

  - by user343317

  I was unable to find any solution of my specific issue. I'm using Xcode 3.2. I'd like to indent the next line of function argument just one step in from the previous line: somevariable = pow( a, b); However, Xcode's syntax-aware indenting insists on converting the above into: somevariable = pow( a, b); Where the arguments are aligned with opening parenthesis of the function. How can I make indenting be configured to match my preference?

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• What is wrong with this javascript?

  - by bala3569

  i use this javascript syntax for validating a checkbox... alert(document.getElementById("ctl00_ContentPlaceHolder1_Chkreg").checked); if (document.getElementById("ctl00_ContentPlaceHolder1_Chkreg").checked == false) { document.getElementById("ctl00_ContentPlaceHolder1_ErrorMsg").innerHTML = "please select the checkbox"; document.getElementById("ctl00_ContentPlaceHolder1_Chkreg").focus(); return false; } My alert showed me false but my if loop is not working... Any suggestion...

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• VB.Net calling New without assigning value

  - by dcp

  In C# I can do this: new SomeObjectType("abc", 10); In other words, I can call new without assigning the created instance to any variable. However, in VB.Net it seems I cannot do the same thing. New SomeObjectType("abc", 10) ' syntax error Is there a way to do this in VB.Net?

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• Can I update an Android provider.Settings.System value?

  - by Mr_Ed

  I can read settings like this, for example: final String mytest = System.getString(this.getContentResolver(), System.AIRPLANE_MODE_ON); ...but can't seem to write to settings using putString, no matter what I've tried. Maybe it is the scope of this.getContentResolver()??? I'm a newbie, so who knows, maybe it can't be done, or it's just syntax? Currently the code is in the onCreate of an Activity class. Any insight is much appreciated.

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• Am I supposed to store hashes for passwords?

  - by Doug

  User System and Passwords: I was looking through MD5 stuff, and I am wondering what is the normal/good practice for passwords. Right now, I think people super encrypt the passwords and store the hashes. If so, how does password checking work? I just have the input password go through the encryption process again and then check the hash with the stored one, correct? This question may contradict the above, but should my salt ever be a randomly generated value?

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• Database model for storing expressions and their occurrence in text

  - by lisak

  Hey, I'm doing a statistical research application. I need to store words according to 2 initial letters which is 676 combinations and each word has its number of occurrences (minimal, maximal, average) in text. I'm not sure how the model/schema should look like. There will be a lot of checking whether the keyword was already persisted. I appreciate your suggestions. Edit: I'll be using either mysql or postgresql + spring templates

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• How do I use multiple precisions in printf()?

  - by Tommy

  Looking at the information under the heading "Precision can be omitted or be any of:". The example: printf("%.*s", 3, "abcdef"); works, outputting:abc (truncating the rest of the string.) Now, I would like to have a string with multiple parameters formatted (truncated): printf("%.*s, %.*s", 3, 3, "abcdef", "xyz123"); but the program crashes. What is the correct syntax? Thank You.

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• Insert or update when product is present using mysql

  - by Aryan

  main_product table productid outward shopid 333 2 44//present 343 4 44//present 353 5 44//present 363 1 44//present 373 2 44//not present min_product table productid outward shopid 333 1 44 343 1 44 353 1 44 363 1 44 SELECT DISTINCT (A.productid),A.outward, B.productid,B.outward FROM main_product A INNER JOIN min_product B on B.productid=A.product_id where A.shopid='44' and B.shopid='44' my question how can i INSERT OR UPDATE in one query using mysql by checking if it is present or not if present update else insert something like this? INSERT INTO mytable (key, value) VALUES ($newkey, $newvalue) ON DUPLICATE KEY UPDATE SET value = $newvalue

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• How does pattern matching work behind the scenes in F#?

  - by kryptic

  Hello Everyone, I am completely new to F# (and functional programming in general) but I see pattern matching used everywhere in sample code. I am wondering for example how pattern matching actually works? For example, I imagine it working the same as a for loop in other languages and checking for matches on each item in a collection. This is probably far from correct, how does it actually work behind the scenes?

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• Alphanumeric and more

  - by Luke

  So I am designing a registration page and checking the username is alphanumeric. "^([0-9a-z])+$" I use that to do so. Is there any way I can get that to include underscores (_), dash (-), and spaces? Thanks

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• Python: How can I subclass a class I'm nesting in?

  - by singpolyma

  I am trying to do the following in a bit of python code: class Parent: class Child(Parent): pass And it does not work. Is there any python syntax I can use to achieve the same result? Thanks.

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• What are the standard practices for throwing Javascript Exceptions?

  - by T.R.

  w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception handling in Javascript? Are there built-in exception types (like NullPointerException)? (if so, what are they, what kind of inheritance do they use, and are they preferred over other options?)

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• I'm looking for a textbook based introduction to the php 5.3.2? Any suggestions?

  - by prgrmnGuru

  By textbook based i mean the author asks the reader questions/mini projects after every section/chapter of the book. And the book includes background info on php 5, like what kind of language, its use, syntax/semantix/structure etc. Any suggestions?

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• What is the easiest, most concise way to make selected attributes in an instance be readonly?

  - by Kevin Little

  In Python, I want to make selected instance attributes of a class be readonly to code outside of the class. I want there to be no way outside code can alter the attribute, except indirectly by invoking methods on the instance. I want the syntax to be concise. What is the best way? (I give my current best answer below...)

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• Teamcity - Build Number - Pass into ant script

  - by J G

  I want to pass the build number from Teamcity into an ant script as a parameter. Does anyone know the exact syntax for doing this?

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• $Id tag in comment headers

  - by Bernhard

  When I read source from open source projects I often find a comment line with "$Id" at the header of the file, f. ex.: // $Id: addappwindowa.c 30792 2009-03-07 22:40:04Z neil $ Is there an "offical" syntax for this lines? (What does "30792" means? ) Are there editors that auto-generate these "$Id"s? Are there any tools that use this information?

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