String operations in C++ Builder are mainly performed using a class called AnsiString. The AnsiString class is not derived from TObject. Therefore, it has a high level of independence and flexibility from the application or the control that wants to use it.
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A sub string is a string that is created from, or is included in, another string. C and C Builder allow you to find a sub string in an original string, to get the position of a sub string in a string, etc. With a string, you can create a new string retrieved from the original. StringCollection class is a new addition to the.NET Framework class library that represents a collection of strings. In this article, we will discuss how to take advantages of its methods and properties to manage a collection of strings.
It is simply incredible the level of work and support provided by the VCL to its strings and text-related operations. Almost any possible operation that can be performed on a string is supported. There are so many functions that we will review only those that are most used in this book but all functions that were created in the libraries are highly valuable and can save you a tremendous amount of code writing and headache.
In this article we will see 2 techniques to split a std::string in C and return the result in std::vectorstring i.e. Splitting a std::string using a char as delimiter. Splitting a std::string using an another std::string as delimiter. How to Split a std::string using a char as delimiter. The String.Split method splits a string into an array of strings separated by the split delimeters. The split delimiters can be a character or an array of characters or an array of strings. The code examples in this article discuss various forms of String.Split method and how to split strings using different delimiters in C# and.NET.
Many controls use AnsiString properties. All controls that use a caption (forms, panels, labels, etc) have their Caption property set as an AnsiString value. Many other controls such as the edit box use the AnsiString class as the basis of their text. Based on these two facts, you have already used and implemented AnsiString values. In some other scenarios you will need to declare and possibly initialize a string before using it.
To declare a string, use the AnsiString word followed by a valid C++ name. Here is an example:
Since AnsiString is a class with its own constructor, you can also declare its variable with empty parentheses, which would be calling the class’ constructor. Here is an example:
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I really should make some time to read through all of the articles in there.
Would you please be so kind as to explain how ropes could help make this faster?
For the record, I just learnt about them by you mentioning them, but wikipedia compares them to array-based strings: http://en.wikipedia.org/wiki/Rope_(data_structure)#Comparison_with_monolithic_arrays
From other articles, it seems like ropes only become beneficial when used on large strings, so it seems (like usual) there is no 'one fastest way', it depends on the size of string you're intending to split.
I tried to have a look at the boost::split code:
But I fear I'm not familiar enough with boost / c++ to really grasp why it is (that much) faster.
All the best,