keyword

问题 I need a list of Oracle Database 10g and SQL Server 2008 reserved key words. My application performs DDL statements, thus I need to validate the entered table-, column names, etc. against the reserved words. I know that I can copy and paste the words from the websites: Oracle 10g and SQL Server 2008 But I would prefer a SQL command so that the keywords can be loaded dynamically. For oracle there exists the command: SELECT KEYWORD FROM V$RESERVED_WORDS ORDER BY KEYWORD ASC ; It's just strange

问题 I've been told that if I'm coding in ANSI-C to declare in the order that the variables will be used, assert that pointers are not null and that indices are within bounds, and to initialize just before usage of the variable. If I declare a const can I initialize it after a block of assertions and code ? In Java final initializations must occur at declaration, yet is it consistent through ANSI-C implementations that I can initialize a const once but not necessarily at the time of declaration ?

问题 Most people will probably say this is a bad idea. I want to use the content of a string as the name of a variable. I want to accomplish the dreaded: s = 'x' x = 1 where the variable name x comes (somehow?) from the string s . To answer the "why?", say I have a global default value for x that I want the option of overriding in a function. But: x = 0 def f(**kw): print x f(x=1) prints 0 not 1 . If I could use the strings in kw.keys() to reassign x (or any other globally set variables) then I'd

问题 I am trying to get the search keyword from a referrer url. Currently, I am using the following code for Google urls. But sometimes it is not working... $query_get = "(q|p)"; $referrer = "http://www.google.com/search?hl=en&q=learn+php+2&client=firefox"; preg_match('/[?&]'.$query_get.'=(.*?)[&]/',$referrer,$search_keyword); Is there another/clean/working way to do this? Thank you, Prasad 回答1: If you're using PHP5 take a look at http://php.net/parse_url and http://php.net/parse_str Example: //

问题 I have several applications in App Store and I wish to get further advanced analytics for how they are doing. I'm already listed to some sites that do analytics for Number of Downloads and for Online Ranking (they check every hour where was each app ranked in each country). I want to have the following: Landing - I want to check how people got to my application's App Store / iTunes page; from commercial banners, reviews (I want to see that it came from a specific web page), from inner banners

问题 This is just for curiosity Why does this code work: Html.TextBoxFor(x => x.Age, new { @Value = "0"}) and this doesn't: Html.TextBoxFor(x => x.Age, new { @value = "0"}) Note the uppercase 'V' in @Value I know value is a keyword, but so is readonly and it works. It's not necessary to use @Readonly (with uppercase 'R'). Does anybody have a clue? 回答1: I'm not 100% sure but, that could be value is a keyword in properties, readonly isn't. Look at properties from MSDN. 回答2: InputExtensions

问题 Today I learnt about the is keyword in Python and tried the following: >>> x=2+2 >>> y=4 >>> x is y True I started off trying is with integers because I knew the answer would be False -- so I found the result very surprising! To give some context, my background is C++ and C# where there is a distinction between value types and object types. In Python, as I now realize, everything is a reference type. It seems the reason that x is y is True is the same as explained in this question, How is the

问题 I wasn't aware of this, but apparently the and and or keywords aren't operators. They don't appear in the list of python operators. Just out of sheer curiosity, why is this? And if they aren't operators, what exactly are they? 回答1: Because they're control flow constructs. Specifically: if the left argument to and evaluates to False, the right argument doesn't get evaluated at all if the left argument to or evaluates to True, the right argument doesn't get evaluated at all Thus, it is not

问题 I'm working on a block of code that will return the nth prime to the user. I'm getting "unexpected keyword_end" syntax errors for lines 19 and 22. I put comments in the code so you can find the locations of the errors easily. def nthPrime(n) number = 3 primeNumber = 1 i = 0 primes = [2] #Iterates the number until we've found the desired number of primes. while primeNumber < n #Iterates through the prime numbers already found to locate prime factors. while i < primes.length #Returns TRUE if a

问题 I'm trying to come up with the fastest way to make search suggestions. At first I thought a Levenstein UDF function combined with a mysql table would do the job. But using levenshtein, mysql would have to go over every row in the table (tons of words) which would make the query really slow. Now I recently installed and started to use Sphinx (http://sphinxsearch.com/) for fulltext searching mainly because of its performance and tight mysql integration with SphinxSE. So I asked myself if I can