![]() ![]() Major new features: nullable reference-types, asynchronous streams, indices and ranges, readonly members, using declarations, default interface methods, static local functions, and enhancement of interpolated verbatim strings. Auto-properties' backing fields can now be targeted by attributes. Expression variables in initializers and queries. Unsafe improvements: stackalloc initialization, unpinned indexed fixed buffers, custom fixed statements. New features: enum, delegate and unmanaged generic type constraints. New features: private protected access modifier, Span, aka interior pointer, aka stackonly struct, and everything else. New features: async main, tuple member name inference, default expression, and pattern matching with generics. Major new features: tuples, ref locals and ref return, pattern matching (including pattern-based switch statements), inline out parameter declarations, local functions, binary literals, digit separators, and arbitrary async returns. Features: initializers for automatically implemented properties, using directives to import static members, exception filters, element initializers, await in catch and finally, extension Add methods in collection initializers. Major features: async programming, and caller info attributes. Major new features: late binding ( dynamic), delegate and interface generic variance, more COM support, named arguments, tuple data type and optional parameters ![]() Major new features: lambda expressions, extension methods, expression trees, anonymous types, implicit typing ( var), and query expressions Major new features: generics, anonymous methods, nullable types, and iterator blocks First version to call Dispose on IEnumerators which implemented IDisposable. C# 1.2 (bizarrely enough) released with. ![]() These are the versions of C# known about at the time of this writing: I need to know where it exists in the string. In this case, it isn't enough to just know the exact match exists. RegEx.IsMatch and RegEx.Match are, as far as I can tell, simply boolean searches. So the question is, is there a way to force IndexOf to find only an exact match or is there another way to force that exact whole word match so that I can find the index of that exact match and then perform some useful function with it. The problem is, I don't want SUBTOTAL, but IndexOf finds the first occurrence of the word TOTAL which is in SUBTOTAL which then yields the incorrect value of 34.37. The output of the above code is: // 34.37 String strAmount = Regex.Replace(amount, "", "") Ĭonsole.WriteLine("Press any key to continue.") String amount = str.Substring(indx + "TOTAL".Length, 10) String str = "SUBTOTAL 34.37 TAX TOTAL 37.43" RegEx.Match and RegEx.IsMatch don't seem to get me where I want to be.Ĭonsider the following scenario: namespace test Since I'm concatenating I'm not really sure of how to use the \b to enforce a full match.I am seeking a way to search a string for an exact match or whole word match. I have also tried concatenating the name part with other numbers like this, but with no success: Relationships <- subset(Relationships, grepl(paste(paste(Names$name, '3', sep = ""), collapse = "|"), Relationships$Results)) This doesn't work, if I use fixed = TRUE than it doesn't return any result at all (which is weird). Relationships <- subset(Relationships, grepl(paste(Names$name, collapse = "|"), Relationships$Results)) Records <- c("ThisIsTheResultIWant", "notThis", "notThis", "notThis") ![]() This variable is build like this "WordNumber" but for the same word I have multiple numbers (more than 30), so when I use the grepl expression to get for instance Word1 I get also results that I would like to avoid, like Word12.Īny ideas on how to fix this? Names <- c("Word1") This is based on the comparison between two columns Result and Names. I'm trying to extract certain records from a dataframe with grepl. ![]()
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