object-type

Determine type of a variable in Tcl

由 时光总嘲笑我的痴心妄想 提交于 2019-12-30 02:11:39
问题 I'm looking for a way to find the type of a variable in Tcl. For example if I have the variable $a and I want to know whether it is an integer. I have been using the following so far: if {[string is boolean $a]} { #do something } and this seems to work great for the following types: alnum, alpha, ascii, boolean, control, digit, double, false, graph, integer, lower, print, punct, space, true, upper, wordchar, xdigit However it is not capable to tell me if my variable might be an array, a list

How can I extend FB's built-in open graph action type, watch?

由 那年仲夏 提交于 2019-12-14 03:17:16
问题 I want to use open graph to "watch real time sports matches." Built-in watch action-type seems to support only TV-show, movie, and video and doesn't support game match. Could anyone tell me how to extend built-in watch action-type? And if possible, please show me how to extend built-in object-types? Built-in game match object type requires sores and players. But you can not know the box scores untile the game ending, actually. 回答1: Open Graph doesn't support extending actions today -- instead

Is it possible to specify the object type allowed in a Dictionary?

由 左心房为你撑大大i 提交于 2019-12-13 23:31:36
问题 In Swift 3.x is it possible to specify the object type allowed in a Dictionary? It would be great if at declaration time we could pass a set of object types allowed. 回答1: You can achieve this via a custom protocol that is implemented only by the types you want to allow within the dictionary: protocol AllowedDictionaryValue: {} extension String: AllowedDictionaryValue {} extension Int: AllowedDictionaryValue {} extension MyClass: AllowedDictionaryValue {} extension MyEnum:

Error: property 'data' not found on object of type 'id'

由 ☆樱花仙子☆ 提交于 2019-12-11 19:42:03
问题 I get this error in the method titleFieldValueChanged which is called when the user changes the value of the text field to update the data model. In DetailViewController.m: - (IBAction)titleFieldTextChanged:(id)sender { self.detailItem.data.title = self.titleField.text; } I know I have to write this in bracket notation, correct? But I can't figure out how to do that. 回答1: The bracket notation would look something like: [[[self detailItem] data] setTitle:[[self titleField] text]]; The actual

How to check if object is of type “matplotlib.collections.PolyCollection”

由 折月煮酒 提交于 2019-12-11 05:15:32
问题 For a specific task ( Link ) i want to check if an object is a : matplotlib.collections.PolyCollection or a: matplotlib.lines.Line2D object. I tired it like this: if isinstance(handle, matplotlib.collections.PolyCollection): but this did not work. If would want to test if two variables h and handles are of the same type how would i check them both to bei either matplotlib.collections.PolyCollection or matplotlib.lines.Line2D objects? Edit1 Here is the code in question wich adapts the solution

What is the definition of Incomplete Type and Object Type in C?

由 烈酒焚心 提交于 2019-12-10 17:28:49
问题 What is the definition of Incomplete Type and Object Type in C? Also, could you provide some examples of each? ANSI C99 mentions both type categories in various places, though I've found it difficult to understand what each of them means exactly (there is no paragraph/sentence explicitly defining what they are). 回答1: Let's go to the online C standard (draft n1256): 6.2.5 Types 1 The meaning of a value stored in an object or returned by a function is determined by the type of the expression

How to include object type in Json for asmx web service using Gson

由 我怕爱的太早我们不能终老 提交于 2019-12-10 02:02:23
问题 How do we preserve the object type in json string when sending data to asmx web service in .net 2.0? for example: class A{ string name; } class B : A { string address; } and the web method: [WebMethod] public void PushJson(A obj){ B b = (B) obj; } Now in above example scenario, lets say, i send {"obj":{"name":"waqas","address":"sweden"}} then how can i force my json string to act as type of class B, so that it can be accepted by web method as an object of class A and further parsed back into

Setting default value in Oracle Object Type Constructor Function

由 和自甴很熟 提交于 2019-12-08 07:16:38
问题 I want to set default values in Oracle object type, but it requires all attributes needs to be passed in constructor function for that. Is there anyway, so that I can pass only required attributes in constructor function for which default value is required. Please see the following details SQL> CREATE TYPE TYPE_SUB AS OBJECT( 2 COL1 NUMBER, 3 COL2 VARCHAR2(100) 4 ) 5 NOT FINAL 6 / Type created. SQL> CREATE OR REPLACE TYPE TYPE_MAIN 2 UNDER TYPE_SUB 3 ( 4 COL3 varchar2(10), 5 COL4 VARCHAR2(10)

How to include object type in Json for asmx web service using Gson

由 倖福魔咒の 提交于 2019-12-05 00:26:41
How do we preserve the object type in json string when sending data to asmx web service in .net 2.0? for example: class A{ string name; } class B : A { string address; } and the web method: [WebMethod] public void PushJson(A obj){ B b = (B) obj; } Now in above example scenario, lets say, i send {"obj":{"name":"waqas","address":"sweden"}} then how can i force my json string to act as type of class B, so that it can be accepted by web method as an object of class A and further parsed back into object of class B? in short, how to preserve polymorphism in json? I've noticed that the compiler

Determining type of object with id in FB Graph API

由 这一生的挚爱 提交于 2019-12-04 07:59:40
问题 Is there a way to determine what kind of object is represented by the given ID https://graph.facebook.com/ID . When I'm requesting this in Graph API Explorer tool, in the response there is a field named type , that could contain user , page , album , photo and so on. But when I'm requesting the same from browser or via SDK, in response there is no such field, but everything else is the same. And I have to guess what kind of object I have relying on other fields: for example if there is a
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