keyword

问题 What is the use of using the iter function in python? Instead of doing: for i in range(8): print i I could also use iter : for iter in range(8): print iter 回答1: First of all: iter() normally is a function. Your code masks the function by using a local variable with the same name. You can do this with any built-in Python object. In other words, you are not using the iter() function here. You are using a for loop variable that happens to use the same name. You could have called it dict and it

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: Sell me on using const correctness I'm eager to know the answer. [to "What is the benefit of const keyword in programming?"] 回答1: const indicates that the value assigned to the variable cannot change. If you try to change the value you should get a compiler error. 回答2: The const keyword can declare a read only variable. Using const parameters to a method tells you the method will not change the parameter. A

问题 Ok so here is the example query: SELECT DISTINCT id, amount FROM tbl_recurring_payment AS t WHERE ADDDATE(t.start_date, INTERVAL (t.period) UPPER(t.unit)) = CURDATE()); The area in question is UPPER(t.unit) where I want that expr to be treated as a mysql keyword (possible values of this column are day, week, month, year). It throws an error since it cant use the expr as a keyword. Is there anything I can do to get this to work or should I just add a check for the unit and hardcode the keyword

问题 Is it possible in Javascript to determine if a certain string is a reserved language keyword such as switch , if , function , etc.? What I would like to do is escaping reserved identifiers in dynamically generated code in a way that doesn't break on browser-specific extensions. The only thought coming to my mind is using eval in a try-catch block and check for a syntax error. Not sure how to do that though. Any ideas? 回答1: One option would be to do: var reservedWord = false; try { eval('var '

问题 I am in the process of transitioning us from an MSAccess backend to a SQL Server back end. Without really considering keywords our plan has an Admin, Order and Address schema.I have always read and been taught that you should never use keywords as schema, function,stored procedure, etc. names and that doing so will really hose you. If I plan to make it standard practice to always explicitely define my schema (E.G. [Admin].CompanyInformation) then is using a keyword an issue? 回答1: Once again,

问题 I've made the same dumb mistake many many times: (defrecord Record [field-name]) (let [field (:feld-name (->Record 1))] ; Whoops! (+ 1 field)) Since I misspelled the field name keyword, this will cause a NPE. The "obvious" solution to this would be to have defrecord emit namespaced keywords instead, since then, especially when working in a different file, the IDE will be able to immediately show what keywords are available as soon as I type ::n/ . I could probably with some creativity create

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I'm writing a small helper utility for obscure software that is used at a local shop. Basically, I would like to know if anyone searches for anything associated with that software and if publishing my work on the Internet would make any sense. I entered the name of the software into Google Trends, but my terms

问题 Does anyone manage to get relevant advertisement from AdMob server when setting keywords or search query ? My application runs on Android and I manage to retrieve ads from the AdMob server. I try several solutions but they do not seem to work. Solution 1: use the methods setKeywords( String keywords ) or setSearchQuery( String searchQuery ) from the AdView class and then, call requestFreshAd() . When a request is currently in progress, a call to requestFreshAd() generate the following message

问题 To this SO question: What is the C# equivalent of friend?, I would personally have answered "internal", just like Ja did among the answers! However, Jon Skeet says that there is no direct equivalence of VB Friend in C#. If Jon Skeet says so, I won't be the one telling otherwise! ;P I'm wondering how can the keyword internal (C#) not be the equivalent of Friend (VBNET) when their respective definitions are: Friend VBNET The Friend (Visual Basic) keyword in the declaration statement specifies

问题 I'm executing the following query but it is giving syntax error. Because the keyword key is registered in SQL SELECT `id` AS key, `country_name` AS value FROM countries I also tried using brackets like this but it's not working: SELECT `id` AS [key], `country_name` AS value FROM countries How to deal with it? 回答1: Use backtick(`) or Single Quote(') to give alias name of column in MySQL. Try this: SELECT `id` AS 'key', `country_name` AS value FROM countries; OR SELECT `id` AS `key`, `country