dynamic

问题 I have a MS-Visual Studio 2005 workspace having all c code. This application(exe) allocates memory dynamically from heap using malloc and realloc. I want to calculate the maximum size allocated size allocated on heap using malloc/realloc by this application program when i run particular test case. I do not want to change the code by noting the malloc sizes and accumulating them, because: a) there can be a scenario, that some memory of 1KB is malloc'ed, then freed, and then a memory of 2KB is

问题 Is there any such equivalent of Java String myMethod (MyClass argument) {...} in Python? Thank you, Tomas 回答1: No. (And more stuff to round this up to 15 characters...) 回答2: No, there is not. In fact, checking types is considered "un-Pythonic", because an object of any type that looks enough like the expected type should be treated equally. 回答3: Python 3.x has function annotations where you can declare argument and return types: def myMethod(argument: MyClass) -> str: ... But currently Python

问题 Given the following Haskell code snapshot: class Foo a where bar :: a -> ... quux :: a -> ... ... Where the value of a is determined at runtime - the class dispatches on this value. I'm assuming that the compiler can statically check the types at compile-time, and ensure that no invalid types can dispatch on it. Now if we compare this to a dynamic dispatch in Java: interface Flippable { Flippable flip(); } class Left implements Flippable { Right flip(); } class Right implements Flippable {

问题 I'm wondering if it is possible to return a result set with column names which are stored in a separate table. Is this possible or do I need a stored_procedure with variables. See link for mysql_dump and description of required resultset: http://pastie.org/584865 回答1: You'd have to use a stored procedure that'd generate SQL dynamically and then run it. Column names aren't really first-class data in SQL, so you can't do much anything with them. They are determined at query parse time, before

问题 How we can create a table of contents page dynamically in XSL-FO? 回答1: What I've done in the past is use <fo:page-number-citation> for each entry in the TOC (Table of Contents). I do the table of contents as an <fo:table> . The <fo:page-number-citation> has a ref-id attribute that should contain the id of the location you're referencing. It should generate the PDF page number where that id is located. For example, if you wanted each <chapter> referenced in your TOC, you would use <fo:page

问题 Im using wkhtmltopdf --header-html option, but it seems, that it really works only with html code. Is there any way I can add some PHP and force it to working somehow? I need to display Date and user´s e-mail on every page... Thanks for any advice ;) 回答1: You can feed --header-html almost anything :) Try the following to see my point: wkhtmltopdf.exe --margin-top 30mm --header-html isitchristmas.com google.fi x.pdf So isitchristmas.com could be www.yoursite.com/magical/ponies.php Just to add,

问题 This question already has answers here : In C++ books, array bound must be constant expression, but why the following code works? (2 answers) Closed 3 years ago . For some reason, in the past, I recall not being able to do something like: int arraySize; cin >> arraySize; int array[arraySize]; But recently, I tried this again and its not causing any issues. I could've sworn before this was something that threw an error in my compiler (macOS Sierra, Xcode 8.1). Was anything in the language

问题 I have a collection of expando objects / dynamic as var lst = new List<dynamic>(); dynamic exp1 = new ExpandoObject(); exp1.Name = "ddd"; lst.Add(exp1); dynamic exp2 = new ExpandoObject(); exp2.Name = "aaa"; lst.Add(exp2); When I am doing var query = from t in lst where t.Name == "ddd" select t; But when I am using Dynamic Linq Library var query = lst.AsQueryable().Where("Name==@0", "ddd"); I am getting a parse exception from dynamic linq library. Please help me achieve this. 来源： https:/

问题 Given a consumer which uses a service, how can this consumer select a specific provider dynamically using declarative service ? Example Service.java public interface Service { public void do(); } Provider1.java public class Provider1 implements Service { @Override public void do(){ //a way } } Provider2.java public class Provider2 implements Service { @Override public void do(){ //another way } } Consumer.java public class Consumer { private Service myService; protected void bindService

问题 I heard that Objective-C is influenced by the "message passing mechanism" of SmallTalk. Objective-C, like Smalltalk, can use dynamic typing: an object can be sent a message that is not specified in its interface. This can allow for increased flexibility, as it allows an object to "capture" a message and send the message to a different object that can respond to the message appropriately, or likewise send the message on to another object. And I felt for codes like [anObject someMethod] , the