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• Why would someone use WHERE 1=1 AND <conditions> in a SQL clause?

  - by Bogdan Maxim

  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?

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• echo "-e" doesn't print anything

  - by wheleph

  I'm using GNU bash, version 3.00.15(1)-release (x86_64-redhat-linux-gnu). And this command: echo "-e" doesn't print anything. I guess this is because "-e" is one of a valid options of echo command because echo "-n" and echo "-E" (the other two options) also produce empty strings. The question is how to escape the sequence "-e" for echo to get the natural output ("-e").

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• Do Java annotations add notation or functionality?

  - by cafe

  Are Java annotations used for adding functionality to Java code besides just adding documentation about what's going on in the code? What's the most advanced/complex functionality you could add to your code through an annotation?

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• fastest way to upload an xls file into a database

  - by shmichael

  I have an xls file with ~60 sheets of data. I would like to move them into a database (postgres) such that each sheet's data is stored in a different table. What is the fastest way of creating these tables? I don't care about naming or proper typing of columns. The columns could all be strings for that matter. I don't want to run 60 different csv uploads.

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• String split operations in C# .

  - by Indigo Praveen

  Hi All, I have a string say string s ="C:\\Data" , I have an array which contains some strings containg "C:\Data" in the beginning i.e. string[] arr = new {"C:\\Data\abc.xml","C:\\Data\Test\hello.cs"};. I have to remove the string "C:\Data" from each entry and have to combine it with another string say string fixed = "D:\\Data". What is the best way to do it, please help as I am a new programmer in C#.

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• Javascript plugins design pattern like jQuery

  - by Marco Demaio

  Could someone write down a very simple basic example in javascript to conceptualize (and hopefully make me understand) how the jQuery plugin design pattern is done and how it works? I'm not interested in how creating plugin for jQuery (so no jQuery code here at all). I'm interested in a simple explanation (maybe with a bit of Javascript code) to explain how it is done the plugin concept. Plz do not reply me to go and read jQuery code, I tried, but I it's too complex, otherwise I would have not post a question here.

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• Extracting a URL from within a string

  - by JK

  My app receives numerous text strings which may or may not contain a URL anywhere within the string. What would be the best method to extract a URL from within a string? Thank you.

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• C# Dictionary<> and mutable keys

  - by Pierreten

  I was told that one of the many reasons strings were made immutable in the C# spec was to avoid the issue of HashTables having keys changed when references to the string keys altered their content. The Dictionary< type allows reference types to be used as a key. How does the dictionary avoid the issue of altered keys that lead to "misplaced" values? Is there a memberwise clone made of an object when used as a key?

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• Remove trailing letters at the end of string

  - by wang

  I have some strings like below: ffffffffcfdeee^dddcdeffffffffdddcecffffc^cbcb^cb`cdaba`eeeeeefeba[NNZZcccYccaccBBBBBBBBBBBBBBBBBBBBBB eedeedffcc^bb^bccccbadddba^cc^e`eeedddda`deca_^^\```a```^b^`I^aa^bb^`_b\a^b```Y_\`b^`aba`cM[SS\ZY^BBB Each string MAY (or may not) end with a stretch of trailing "B" of varied length. I'm just wondering if we can simply use bash code to remove the "B" stretch? thx

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• What does this `_time_independent_equlas` mean?

  - by Satoru.Logic

  In the tornado.web module there is a function called _time_independent_equals: def _time_independent_equals(a, b): if len(a) != len(b): return False result = 0 for x, y in zip(a, b): result |= ord(x) ^ ord(y) return result == 0 It is used to compare secure cookie signatures, and thus the name. But regarding the implementation of this function, is it just a complex way to say a==b?

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• Array of function pointers in Java

  - by Waltzy

  I have read this question and I'm still not sure whether it is possible to keep pointers to methods in an array in Java, if anyone knows if this is possible or not it would be a real help. I'm trying to find an elegant solution of keeping a list of Strings and associated functions without writing a mess of hundreds of 'if's. Cheers edit- 'functions' changed to 'methods', seems to bug people.

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• Storing SMTP credentials for a VB.Net application

  - by Jonesy

  Hi folk, I've been storing SQL connection strings in web.conf which is fine but now I need to store SMTP credentials somewhere protected. web.conf seems like the likeliest place since its protected but how can they be stored? -- Jonesy

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• Clarification needed about Python CSV file format parsing

  - by HH

  Format is like: CHINA;2002-06-25 00:00:00.000;5,60 CHINA;2002-06-26 00:00:00.000;5,32 CHINA;2002-06-27 00:00:00.000;5,31 and I try to use Python's CSV tools to parse it but cannot understand the paragraph, source: And while the module doesn’t directly support parsing strings, it can easily be done: import csv for row in csv.reader(['one,two,three']): print row Could someone clarify the line ['one,two,three']? How would you use it with format A;B;C?

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• .NET IsValidXml Extension Method Performance

  - by tyndall

  I have a legacy application that I inherited that passes a lot of XML around as Strings. I often need the ability to check if a String will be valid XML. What is the fastest and least expensive way to check if a string is valid XML in .NET? I'm working in .NET 3.5 and would most likely use this as an extension method (off of string) in this one project within the solution.

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• Javascript: How to detect if a word is highlighted

  - by fterh

  I'm writing a Firefox addon that is triggered whenever a word is highlighted. However I need a script that detects when a word is highlighted, and I'm stuck. An example would be nytimes.com (when you're reading an article and you highlight a word, the reference icon pops up). However the nytimes.com script is super complex. I'm 16 and not much of a programmer, so that is definitely way out of my league.

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• Fill a array with List data

  - by marionmaiden

  How can I fill a array with the data provided by one List? For example, I have a List with Strings: List l = new ArrayList<String>(); l.add("a"); l.add("b"); l.add("c"); then I want to copy this data into a String array: String[] array = ?

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• How to let CMake to know the library is in some directory?

  - by prosseek

  I have a library in c:\cppunit\lib, and a header files in c:\cppunit\include. I come up with this cmake file to build with the library. How to let CMake to know the library is in c:/cppunit/lib? PROJECT( cppunitest ) INCLUDE_DIRECTORIES( "c:/cppunit/include" ) ??? How to let CMake to know the library is in c:/cppunit/lib SET( cppunitest_SRC main.cpp testset.cpp complex.cpp ) LINK_LIBRARIES(cppunit) ADD_EXECUTABLE( cpptest ${cppunitest_SRC})

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• Programatically importing a file and creating an instance of a class in Python

  - by benofsky

  I have a (python) list of strings which refer to python source files and subsequently classes within those files which I want to import and then create an instance of the classes within the files (everything follows a strict naming convention, making this theoretically possible), in Ruby I would do something like: require "lib/sources/#{source}.rb" s = source.constantize.new How would I do something similar in Python? Thanks, Ben

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• Populate a vector with all multimap values with a given key

  - by John

  Given a multimap<A,B> M what's a neat way to create a vector<B> of all values in M with a specific key. e.g given a multimap how can I get a vector of all strings mapped to the value 123? An answer is easy, looping from lower-upper bound, but is there a neat loop-free method?

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• Authoritative Excel range syntax reference

  - by olefevre

  Sorry if this has been asked before but I can't find it. I am looking for an authoritative description of all valid strings that can be used as a reference, e.g., "A1:C5", "$A:$A", $A2" etc etc. That seems a pretty basic thing yet I've wasted hours trying to locate it. All I can find is a swamp of "helpful" examples but no reference.

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• between C# and Python, which is better at random number generation?

  - by Matt

  Without relying on third party libraries or obscenely complex custom number generating things, which of those two languages makes the most 'random' random numbers? not too important, just a program that simulates dice rolls (I'm still a little new at both languages)

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• Parameter has no value

  - by Simon

  string queryString = "SELECT SUM(skupaj_kalorij)as Skupaj_Kalorij " + "FROM (obroki_save LEFT JOIN users ON obroki_save.ID_uporabnika=users.ID)" + "WHERE users.ID= " + a.ToString() + " AND obroki_save.datum =?"; using (OleDbCommand cmd = new OleDbCommand(queryString,database)) { cmd.Parameters.Add("@datum", OleDbType.Char).Value = DateTime.Now.ToShortDateString(); } Why doesn't the parameter datum get the date value? (the value of at least one complex parameter has not been determined )

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• Does Cocoa’s printf-style formatting not work as expected when using %@ conversion specifier and fie

  - by Nikolai Ruhe

  My understanding of printf-like format strings is that you can prefix any conversion specifier with a minimum field width. This does not seem to work for Cocoa’s %@ specifier. Example: NSLog(@"'%5@'", @"foo"); NSLog(@"'%5s'", [@"foo" UTF8String]); Output: … 'foo' … ' foo' Is this the intended behavior?

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• SEO Friendly URLs where the phrase used may change in Rails

  - by Newy

  Say I have http://www.mysite.com/I-Like-Cheeseburgers and I want that to point to Item with id 3. Sometime later, I change the name of the item, and now its http://www.mysite.com/I-Like-Hamburgers (and perhaps many more times). I want all these URLs to remain pointing to Item 3. Is it efficient to simply keep a table of [strings,item_ids] and do a lookup on this? Is there a better way?

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• String replacment in batch file

  - by Faisal

  We can replace strings in a batch file using the following command set str="jump over the chair" set str=%str:chair=table% These lines work fine and change the string "jump over the chair" to "jump over the table". Now I want to replace the word "chair" in the string with some variable and I don't know how to do it. set word=table set str="jump over the chair" ?? Any ideas?

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