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  • primitives of a programming language

    - by Tim
    Hi, Which do the concepts control flow, data type, statement, expression and operation belong to? Syntax or semantics? What is the relation between control flow, data type, statement, expression, operation, function, ...? How a program is built from these primitives level by level? I would like to understand these primitive concepts and their relations in order to figure out what aspects of a new language should one learn. Thanks and regards!

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  • What's the different between these 2 mysql queries? one using left join

    - by Lyon
    Hi, I see people using LEFT JOIN in their mysql queries to fetch data from two tables. But I normally do it without left join. Is there any differences besides the syntax, e.g. performance? Here's my normal query style: SELECT * FROM table1 as tbl1, table2 as tbl2 WHERE tbl1.id=tbl2.table_id as compared to SELECT * FROM table1 as tbl1 LEFT JOIN table2 as tbl2 on tbl1.id=tbl2.id Personally I prefer the first style...hmm..

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  • Dynamic SQL to query an Adventureworks table

    - by salvationishere
    I am trying to see a list of tables from Adventureworks DB from "Person" schema in Sql Server 2008. I developed teh following SP, but after running it as follows it gives me error "Incorrect syntax near ')'". Do you know how I can revise this SP or exec statement? CREATE PROCEDURE [getTableNames] @SchemaName VARCHAR(50) AS BEGIN SET NOCOUNT ON; SET @SchemaName = 'PERSON' DECLARE @cmd AS VARCHAR(max) SET @SchemaName = RTRIM(@SchemaName) SET @cmd = N'SELECT TABLE_NAME ' + 'FROM information_schema.Tables ' + 'WHERE TABLE_TYPE = ''BASE TABLE'' AND TABLE_SCHEMA = @SchemaName' END exec sp_executesql getTableNames, N'@SchemaName NVARCHAR(50), @SchemaName'

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  • Which's the best way to protect primary key on ASP.NET MVC?

    - by Junior Mayhé
    I'm creating a ASP.NET MVC website and I was wandering which techniques do you guys use to protect primary key on these mvc urls. Actually ASP.NET MVC generates this syntax for its urls: /Controller/Action/Id Last week I was trying to encrypt it using SHA-1 Encryption, but this encrypter generates some special symbols like + (plus), / (slash), and other annoying chars which difficult the decryption. Perhaps creating a custom encryption should solve the problem. But I wanna here from you guys, do you have some ideas to protect mvc urls?

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  • #warning in Visual Studio

    - by paleozogt
    In gcc I can do compile-time warnings like this: #if !defined(_SOME_FEATURE_) #warning _SOME_FEATURE_ not defined-- be careful! #endif But in Visual Studio this doesn't work. Is there an alternative syntax for #warning?

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  • Do any parsers exist for the Oracle DML table_reference?

    - by JavaRocky
    I wish to find out what tables references are used in a DML. I prefer to use an oracle package as it can be self contained in the database. But other suggestions welcome. Open source very welcome. Here is the link to the syntax diagram of the table_reference definition: http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_10002.htm#i2126863 Do any parsers exist?

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  • How do I make nested options for plugins in jQuery

    - by Oscar Godson
    I know how to do plugins, but how do I do nested options like: var defaults = { spacing:10, shorten_to:50, from_start:0, from_end:2, classes: { test:'testing' } }; i know that isn't right, i just dont know how to write the proper syntax when I want to do something like this: $('#breadcrumbs').breadcrumbs({classes{test:'new_example'},spacing:12}) other suggestions are welcome, im in need of the ability to custom class names and there are 7, so rather than making something like test_class, example_class, etc id like it cleaner and neater like the example above.

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  • sqllite - sql question 101

    - by qstar
    Hi, I would do something like this* select * from cars_table where body not equal to null. select * from cars_table where values not equal to null And id = "3" I know the syntax for 'not equal' is <, but i get an empty results. For the second part, I want to get a result set where it only returns the columns that have a value. So, if the value is null, then don't include that column. Thanks

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  • hibernate sybase db power function

    - by Vipin Thomas
    We are trying to use sybase function power to do mathematical calculation for one of the DB columns. The hibernate is generating power function as pow(?, xyzo0_.AmtScale) whereas sybase supports power function as Syntax POWER( numeric-expression-1, numeric-expression-2 ) We have tried modifying the hibernate.dialect. Have tried org.hibernate.dialect.SybaseASE15Dialect org.hibernate.dialect.Sybase11Dialect org.hibernate.dialect.SybaseAnywhereDialect but all dialects generate the power function as pow(?, xyzo0_.AmtScale). Is this hibernate issue or are we missing something?

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  • Is Programming Right for me?

    - by L1th1um
    I'm interested in programming, but it seems to me that I can't get into it. Every time I've tried to learn a language and stuff by looking through tutorials or books I'd never get past the part where I use the syntax to make something. And by interest, I mean that I read stack overflow a lot, coding horror, and stuff but the actual coding part is hard for me to get into. Did anybody start this way? How did you get past this block?

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  • Is there an alias for the local machine name in the Windows 7 login screen?

    - by Mikael
    We have many computers connected to a AD. The computers names is auto generated. When I want to log in using a local account, I have to figure out what the computer's name is, and log in using the following syntax: [COMPUTER_NAME]\local_account Now I'm wondering if there is an alias that I can use instead? So instead of logging in using NB-aw35sdds\local_account, I can use something like localhost\local_account.

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  • working on lists in python

    - by owca
    I'm trying to make a small modification to django lfs project, that will allow me to deactivate products with no stocks. Unfortunatelly I'm just beginning to learn python, so I have big trouble with its syntax. That's what I'm trying to do. I'm using method 'has_variants' which returns true if product has any. Then I'm building a list from variants for this product. Next for every product in this list (I've called it 'set') I check it's stock and set bool variable 'inactive' to true if product has no stocks and to false if there are any. Finally if 'inactive' is false I'm setting self.active to 0. Code fails in line with: set[] = s How to correct it ? def deactivate(self): """If there are no stocks, deactivate the product. Used in last step of checkout. """ if self.has_variants(): for s in self.variants.filter(active=True): set[] = s for var in set: if var.get_stock_amount() == 0: inactive = True else: inactive = False else: if self.get_stock_amount() == 0: inactive = True if inactive: self.active = False return 0 error log : Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "/home/purplecow/rails/purpledev/site-packages/django/core/management/__i nit__.py", line 362, in execute_manager utility.execute() File "/home/purplecow/rails/purpledev/site-packages/django/core/management/__i nit__.py", line 303, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/home/purplecow/rails/purpledev/site-packages/django/core/management/bas e.py", line 195, in run_from_argv self.execute(*args, **options.__dict__) File "/home/purplecow/rails/purpledev/site-packages/django/core/management/bas e.py", line 213, in execute translation.activate('en-us') File "/home/purplecow/rails/purpledev/site-packages/django/utils/translation/_ _init__.py", line 73, in activate return real_activate(language) File "/home/purplecow/rails/purpledev/site-packages/django/utils/translation/_ _init__.py", line 43, in delayed_loader return g['real_%s' % caller](*args, **kwargs) File "/home/purplecow/rails/purpledev/site-packages/django/utils/translation/t rans_real.py", line 205, in activate _active[currentThread()] = translation(language) File "/home/purplecow/rails/purpledev/site-packages/django/utils/translation/t rans_real.py", line 194, in translation default_translation = _fetch(settings.LANGUAGE_CODE) File "/home/purplecow/rails/purpledev/site-packages/django/utils/translation/t rans_real.py", line 180, in _fetch app = import_module(appname) File "/home/purplecow/rails/purpledev/site-packages/django/utils/importlib.py" , line 35, in import_module __import__(name) File "/home/purplecow/rails/purpledev/lfs/caching/__init__.py", line 1, in <mo dule> from listeners import * File "/home/purplecow/rails/purpledev/lfs/caching/listeners.py", line 10, in < module> from lfs.cart.models import Cart File "/home/purplecow/rails/purpledev/lfs/cart/models.py", line 8, in <module> from lfs.catalog.models import Product File "/home/purplecow/rails/purpledev/lfs/catalog/__init__.py", line 1, in <mo dule> from listeners import * File "/home/purplecow/rails/purpledev/lfs/catalog/listeners.py", line 5, in <m odule> from lfs.catalog.models import PropertyGroup File "/home/purplecow/rails/purpledev/lfs/catalog/models.py", line 589 set[] = s ^ SyntaxError: invalid syntax

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  • PHP vs Phpmyadmin

    - by user330306
    Hi there, I've got this code which i execute on phpmyadmin which works 100% Create Temporary Table Searches ( id int, dt datetime); Create Temporary Table Searches1 ( id int, dt datetime, count int); insert into Searches(id, dt) select a.id, now() from tblSavedSearches a; insert into Searches1(id, dt, count) select b.savedSearchesId, (select c.dt from tblSavedSearchesDetails c where b.savedSearchesId = c.savedSearchesId order by c.dt desc limit 1) as 'dt', count(b.savedSearchesId) as 'cnt' from tblSavedSearchesDetails b group by b.savedSearchesId; insert into tblSavedSearchResults(savedSearchId,DtSearched,isEnabled) select id,now(),0 from Searches where not id in (select savedSearchId from tblSavedSearchResults); update tblSavedSearchResults inner join Searches1 on tblSavedSearchResults.savedSearchId = Searches1.id Set tblSavedSearchResults.DtSearched = Searches1.dt, tblSavedSearchResults.isEnabled = 1; However when i put the same code in php as below it generates an error $dba = DbConnect::CreateDbaInstance(); $query = ""; $query.="Create Temporary Table Searches ( id int, dt datetime); "; $query.="Create Temporary Table Searches1 ( id int, dt datetime, count int); "; $query.="insert into Searches(id, dt) select a.id, now() from tblSavedSearches a; "; $query.="insert into Searches1(id, dt, count) "; $query.="select "; $query.=" b.savedSearchesId, "; $query.=" (select c.dt from tblSavedSearchesDetails c where b.savedSearchesId = c.savedSearchesId order by c.dt desc limit 1) as 'dt', "; $query.=" count(b.savedSearchesId) as 'cnt' "; $query.="from tblSavedSearchesDetails b "; $query.="group by b.savedSearchesId; "; $query.="insert into tblSavedSearchResults(savedSearchId,DtSearched,isEnabled) "; $query.="select id,now(),0 from Searches where not id in (select savedSearchId from tblSavedSearchResults); "; $query.="update tblSavedSearchResults "; $query.="inner join Searches1 on tblSavedSearchResults.savedSearchId = Searches1.id "; $query.="Set tblSavedSearchResults.DtSearched = Searches1.dt, tblSavedSearchResults.isEnabled = 1; "; $dba->DbQuery($query) or die(mysql_error()); I get the following error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Create Temporary Table Searches1 ( id int, dt datetime, count int) insert into S' at line 1 Please if someone could assist me with this ... Thanks

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  • java.bigDecimal divide in ruby environment

    - by Eyal
    I right script in Ruby that include java classes require 'java' include_class 'java.math.BigDecimal' include_class 'java.math.RoundingMode' during the script I need to divide 2 java.bigDecimal one = BigDecimal.new("1") number1 = BigDecimal.new("3") number1 = one.divide(number1,RoundingMode.new(HALF_EVEN)) since I don't have intellisense in this IDE I'm not sure the syntax is right and the runtime error is: uninitialized constant::HALF_EVEN do I combine java object in the ruby scrpit in the right way? how should I divide two java.bigDecimal object in ruby env?

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  • Most complicated C code to read

    - by cprogrammer
    ITT: Post a program that doesn't do anything, but breaks all syntax highlighting. ??=include<stdio.h> // lol????/ why does this compile???????/ haha :> int main()<%int lol<:0x1UL??);printf("%.""0s",(0[lol]??'=*lol,&lol<:(unsigned)"hi"??)));??>

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  • grep + add time out after some time if not find the relevant match

    - by yael
    Dear friends I use the following command syntax to search params in my script grep -qsRw -m1 "any_param" /dir/..../ Some times the search take avery long time The question is how to add time out to grep command For example after 20 seconds grep will break out If it not illegal to add time out to grep , how it will possible on other way? THX Yael

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