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In general, we recommend that you call a method that does not rely on defaults, because it makes the intent of the code unambiguous. Invariant Culture)) End Sub Private Function Show Bytes(str As String) As String Dim hex String As String = String. Length - 1) For Each name As String In names Me.stored Names(index) = name index = 1 Next Array. Binary Search(Me.stored Names, name, String Comparer. Ordinal) If this data is persisted and moved across cultures, and sorting is used to present this data to the user, you might consider using String Comparison.This, in turn, makes the code more readable and easier to debug and maintain. Invariant Culture, which operates linguistically for better user output but is unaffected by changes in culture. Parse(String, IFormat Provider), the persisted date and time data is successfully restored, as the following output shows.Most of the methods that do not rely on defaults include a parameter of type String Comparison, which is an enumeration that explicitly specifies rules for string comparison by culture and case. However, we still recommend that you call an overload that explicitly specifies the String Comparison type even if you want to perform an ordinal comparison; this makes it easier to search code for a certain string interpretation. If so, consider using a case-insensitive comparison. The change code is reflected in the lines labeled ' Correct.The following table describes the String Comparison enumeration members. Dim stored Names() As String Public Sub Store Names(names() As String) Dim index As Integer = 0 Re Dim stored Names(names. End Sub Public Function Does Name Exist(name As String) As Boolean Return Array.One criterion involves using the conventions of the current culture when comparing strings. Subtle and not so subtle bugs can emerge when non-linguistic string data is interpreted linguistically, or when string data from a particular culture is interpreted using the conventions of another culture. However, the Turkish ("tr-TR") alphabet includes an "I with a dot" character "İ" (\u0130), which is the capital version of "i". As a result, in culture-sensitive comparisons, strings that contain embedded null characters can be considered equal to strings that do not. Equals: // Current Culture: True // Invariant Culture: True Module Example Public Sub Main() Dim str1 As String = "Aa" Dim str2 As String = "A" New String(Convert. Write Line("Comparing '' () and '' ():", _ str1, Show Bytes(str1), str2, Show Bytes(str2)) Console.
Ordinal, except that it ignores the usual ASCII casing.
If the culture is not set by the user, it defaults to the setting in the Regional Options window in Control Panel. This happens when an application executes on a computer that has a different culture than the computer on which the application was developed, or when the executing thread changes its culture. Threading; public class Example // The example displays the following output: // Sorting using the en-US culture: // able // Æble // ångström // apple // Visual Studio // Windows // // Sorting using the sv-SE culture: // able // Æble // apple // Windows // Visual Studio // ångström Imports System. Threading Module Example Public Sub Main() Dim values() As String = Array. This behavior occurs in the Azerbaijani ("az") culture as well.
You should always use comparisons that are based on the current culture when data is linguistically relevant, and when it reflects culture-sensitive user interaction. This behavior is intentional, but it remains non-obvious to many developers. Note that the words "ångström", "Windows", and "Visual Studio" appear in different positions in the sorted string arrays. Sort(values) Display Array(values) ' Change culture to Swedish (Sweden). Therefore, assumptions made about capitalizing "i" or lowercasing "I" are not valid among all cultures.
This policy can be useful for maintaining one set of string behavior across cultures, but it often provides unexpected results. Invariant Culture makes linguistic decisions that might not be appropriate for strings that have to be interpreted as a set of bytes. Last Index Of(String) method and pass it a string to locate in the current instance, we recommend that you call an overload that explicitly specifies the String Comparison type.
Comparisons with the invariant culture use the Compare Info property returned by the static Culture Info. This behavior is the same on all systems; it translates any characters outside its range into what it believes are equivalent invariant characters.