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• Python style: if statements vs. boolean evaluation

  - by mkscrg

  One of the ideas of Python's design philosophy is "There should be one ... obvious way to do it." (PEP 20), but that can't always be true. I'm specifically referring to (simple) if statements versus boolean evaluation. Consider the following: if words: self.words = words else: self.words = {} versus self.words = words or {} With such a simple situation, which is preferable, stylistically speaking? With more complicated situations one would choose the if statement for readability, right?

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• Refactoring nested foreach statement

  - by dotnetdev

  Hi, I have a method with a nested foreach collection (iterate a set of objects and then look inside each object). I saw in a book a good pattern to make this much more elegant but cannot remember/find the code example. How else could I make this more tidy? The code is just a typical nested foreach statement so I have not provided a code sample. Thanks

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• Return Statement in JS Constructors

  - by Tony

  What is the effect of a return statement in the body of JavaScript function when it's used as a constructor for a new object(with 'new' keyword)?

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• yield returns within lock statement

  - by DayOne

  Hi eveybody, if i have a yield return in a lock statement does the lock get taken out on each yield (5 times in the example below) or only once for all the items in the list? Thanks private List<string> _data = new List<string>(){"1","2","3","4","5"}; private object _locker =new object(); public IEnumerable<string> GetData() { lock (_locker) { foreach (string s in _data) { yield return s; } } }

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• Is this sql where statement correct?

  - by Priyaa Muthuraman

  I have 10 rows for today's date but my select statement based on date dosen't seem to work.... SELECT Id,WirelessId,RegNo,DriverName1,MobileNo1,DriverName2,MobileNo1 from DailySchedule where IsDeleted=0 and CreatedDate='2010-05-28' Any suggestion...

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• Translate LINQ to sql statement

  - by zielu1

  Hi, I want to translate LINQ expression tree to SQL statement and I don't want to write my own code for this. Example: var query = from c in Customers where c.Country == "UK" && c.City == "London" select c); To SELECT ... FROM Customers AS c WHERE c.Country = "UK" AND c.City = "London" I know DataContext.Log, but I want to use: query.ToSqlStatementString() Thanks

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• SQL - Stored Procedure with Select Statement using IN (@Variable_CommaDelimitedListOfIDS)

  - by GigaPr

  Hi I am creating a stored procedure to which i want to pass as variable a comma delimited list of Ids I want to use the Ids into a select statement something like Create Procedure up_TEST @Ids VARCHAR(MAX) AS SELECT * FROM ATable a WHERE a.Id IN(@Ids) Obviously i get the error that @Ids is a varchar and not an INT but how can i convert the comma delimited list I am using SQL Server 2008 Thanks

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• How to skip a statement in Eclipse during debugging

  - by frankfwl

  Is it possible to skip a statement in Eclipse while debugging? Suppose the process stopped at breakpoint and I want to skip the breakpoint line ( or maybe a few lines below), can I do it? On the debug tab, it only has "Step into", "Step over" and "Step return" buttons. I did google around but couldn't find anything, hopefully I can find an answer here.

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• What's the error in my MySQL statement?

  - by Jim

  The following SQL statement has a syntax error according to phpMyAdmin, but I can't spot what it is. Any ideas? CREATE TABLE allocations( `student_uid` INT unsigned NOT NULL DEFAULT 0, `active` INT unsigned NOT NULL DEFAULT 1, `name` VARCHAR( 255 ) NOT NULL DEFAULT '', `internal_id` VARCHAR( 255 ) DEFAULT '', `tutor_uid` INT NOT NULL DEFAULT 0, `allocater_uid` INT unsigned NOT NULL DEFAULT 0, `time_created` INT NOT NULL DEFAULT 0, `remote_time` FLOAT NOT NULL DEFAULT 0, `next_lesson` VARCHAR NOT NULL DEFAULT -1, PRIMARY KEY ( student_uid ) );

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• Can IF be used to start a MySQL query?

  - by Littledot

  Hi there, I have a query that looks like this: mysql_query("IF EXISTS(SELECT * FROM predict WHERE uid=$i AND bid=$j) THEN UPDATE predict SET predict_tfidf=$predict_tfidf WHERE uid=$i AND bid=$j ELSE INSERT INTO predict (uid, bid, predict_tfidf) VALUES('$i','$j','$predict_tfidf') END IF")or die(mysql_error()); But it dies and mysql tells me to check the syntax near IF EXISTS(....) Can we not use an IF statement to start a mysql query? Thank you in advance.

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• Detect months with 31 days

  - by daddycardona

  Is there an analogous form of the following code: if(month == 4,6,9,11) { do something; } Or must it be: if(month == 4 || month == 6 etc...) { do something; } I am trying to write an if statement that checks if this month has more than 31 days.

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• Best way to use If() statement in My-Sql Query

  - by PHP-Prabhu

  Can any one please let me know the best way to use IF statement in mysql query to show if the "email" field is NULL then it should show as "no email"... Postcode Telephone Email ---------------------------------------------------------- BS20 0QN 1275373088 no email BS20 0QN 1275373088 no email PO9 4HG 023 92474208 [email protected] SO43 7DS 07801 715200 [email protected] ----------------------------------------------------------

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• MySQL select/where statement

  - by expo101

  I have a webapplication linked to a mysql database with the following fields: field 1:trip_id field 2:trip_destination field 3:trip_description field 4:trip_duration In the webapplication I have a listbox based on the following: ListBox value =1: trip duration 1 - 5 days ListBox value =2: trip duration 6 - 10 days Listbox value =3: trip duration 11 -20 days ListBox value =4: trip duration over 20 days How do I put this in the sql select statement?

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• Need help understanding several MATLAB statement

  - by user198729

  All are from this post. What does these statement mean: error(nargchk(5, 6, nargin)); plot(p(:,1), p(:,2), '.-'), axis equal And what's this kinda syntax which I haven't quite often seen: if nargin<6, steps = 36; end

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• New help with SQL Server select statement

  - by gio_333m

  I need help with select statement in SQL Server / T-SQL My table looks like this: Id (int) QuestionId (int) GenreId (int) I want to select random N rows from this table so that maximum number of same GenreId in the result set is less than X for all GenreId-s except one. For that one GenreId, I need row count with that GenreId to be equal to Y.

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• syntax error in a mysql statement

  - by knowledge

  what is the error in the following mysql statement : mysql> SELECT columnName FROM tableName WHERE columnName LIKE '%' + @variableName + '%';

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• Summarize Data with SQL statement

  - by bugbug

  I have CMS table that contain CMS_STARTTIME and CMS_STOPTIME (attachment). I want to create report to summarize exist data by using Date, Time and Year as Parameter (attachment). I don't know how to create sql statement to meet this requirement. I'm using MySQL and MS-SQL. Does one can help? Thank you very much.

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• Confusing If Statement?

  - by NetSide

  I always use If statement (In C#) as (1. Alternative); if (IsSuccessed == true) { // } I know that there is no need to write "== true" as (2. Alternative)); if (IsSuccessed) { // } But, I use it because it is more readable and cause no performance issue. Of course, this is my choice and I know many software developers prefer first alternative. What is the best usage, and Why?

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• Signs that a SQL statement is dangerous

  - by Matt

  Hi, I want to develop a function in PHP that checks how dangerous a SQL statement is. When i say dangerous i mean, certain symbols, characters or strings that are used to get data from a database that the user shouldnt see. For example: SELECT * FROM users WHERE userId = '1' can be injected in several ways. Although i clean the params, i also want to monitor how safe the query is to run. Thanks in advance

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• Auto complete a statement in eclipse

  - by fastcodejava

  Is there a way to auto complete a statement in eclipse? If I type if (condition) it should, after pressing some key, become if (condition) { // putting cursor here }

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• When do we make a call to use between Synchronised statement and Synchronised Block

  - by Cricandcric.com

  Can any one please share their experience on "When do we make a call to use between Synchronised statement and Synchronised Block" Any Performance Issues?

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• javascript if statement

  - by mike

  Hi, In javascript, how can I test 2 "sets" of conditions in one if statement? example: if ((a == 'someValue' && b == 'someValue') || (c == 'someValue' && d == 'someValue')) { // do something } Thanks!

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• check if a value is NULL or Less than 0 in one TSQL statement

  - by Name.IsNullOrEmpty

  ISNULL(SUM(MyTable.Total), 0) AS Total how can i modify the above statement to also check if Total is less than 0 (zero), such that if Total is NULL or less than 0 (negative), i assign 0 to Total

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• MySQLi - Should every statement be prepared?

  - by Kerry

  I know its supposed to improve performance and clean strings, but lets say there are no variables? Might just be a SELECT COUNT( `column` ) AS count FROM `table` Should that be prepared? Is there any case that a SELECT statement should not be prepared?

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• neww help with MSSQL select statement

  - by gio_333m

  Hello, I need help with select statement in MSSQL. My table looks like this: Id (int) QuestionId (int) GenreId (int) I want to select random N rows from this table so that maximum number of same GenreId in the result set is less than X for all GenreId-s except one. For that one GenreId, I need row count with that GenreId to be equal to Y. Thanks in advance

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