option-type

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Optional parameters and option types using F#

Consider the fo开发者_StackOverflow中文版llowing code: type Test () = member o.fn1 (?bo) = 1 member o.fn2 (?bo) = o.fn1 bo[详细]

2023-03-12 21:17 分类：问答
Database design - Optional fields

I\'m about to add a开发者_C百科 field which gives users an optional title. Is it good practise to create an extra table with 1 or more fields with an id to serve as a lookup? Is this considered effici[详细]

2023-02-27 19:20 分类：问答
Required and Optional Arguments Using Boost Library Program Options

I\'m using Boost Program Options Library to parse the command line arguments. I have the following requirements:[详细]

2023-02-18 20:34 分类：问答
Parsing Optional Tags in C#

I\'m tr开发者_开发百科ying to find an easy and slick way to do the following requirement. I have a XML message with this arrangement:[详细]

2023-02-15 11:14 分类：问答
regex c# optional group - should act greedy?

having regex ~like this: blablabla.+?(?:<a href=\"(http://.+?)\" target=\"_开发者_开发知识库blank\">)?[详细]

2023-02-15 08:43 分类：问答
WCF 4: Passing Empty parameters on a GET request

I\'m creating an API which will just use a get request to return some search results from the database, I\'m trying to make it so that optional parameters can be passed (easy with WCF) but also so tha[详细]

2023-02-06 20:35 分类：问答
Regex Optional Matches

I\'m trying to match two types of strings using the preg_match function in PHP which could be the following.[详细]

2023-02-05 21:09 分类：问答
Using Double.NaN in optional parameter on interface

I have come across something confusing or potentially a bug in Visual Studio 2010 when defining an interface in my VB application: When defining an i开发者_如何学编程nterface method with a default par[详细]

2023-02-05 00:09 分类：问答
Optional Scoped injection in Guice

I need to inject a field only if it is available in the current scope, and null otherwise. For example:[详细]

2023-02-04 10:57 分类：问答
Backtracking in scala parser combinators?

It seems like scala\'s parser combinators don\'t backtrack. I have a grammar (see bottom) which can\'t parse the following \"stmt\" correctly:[详细]

2023-02-03 08:42 分类：问答