It is indexer. After you declared it you can do like this: class MyClass { Dictionary<string, MyType> collection; public MyType this[string name] { get { return collection[name]; } set { collection[name] = value; } } } // Getting data from indexer. MyClass myClass = … MyType myType = myClass[“myKey”]; // Setting data with indexer. MyType … Read more
Just as a brief answer, there are two usages for the static keyword when defining variables: 1- Variables defined in the file scope with static keyword, i.e. defined outside functions will be visible only within that file. Any attempt to access them from other files will result in unresolved symbol at link time. 2- Variables … Read more
sum.up is not a valid keyword argument name. Keyword arguments must be valid identifiers. You should look in the documentation of the library you are using how this argument really is called – maybe sum_up?
You ask: Is there a command that can change this maximum length? Is this length the same for other names (columns, tables etc)? The manual answers here: The system uses no more than NAMEDATALEN-1 bytes of an identifier; longer names can be written in commands, but they will be truncated. By default, NAMEDATALEN is 64 … Read more
Change public class Event { public int event { get; set; } public EventDetail data { get; set; } } to this public class Event { public int @event { get; set; } public EventDetail data { get; set; } } This tip shows the quirks involved with escaping in C#: character literal escaping: e.g. … Read more
Basically you only really need it when you want to use two types with the same fully qualified name (same namespace, same type name) from different assemblies. You declare a different alias for each assembly, so you can then reference them via that alias. Needless to say, you should try to avoid getting into that … Read more
Here’s an excerpt from Section 6.7.1 (footnote 101) of the C99 standard (pdf): The implementation may treat any register declaration simply as an auto declaration. However, whether or not addressable storage is actually used, the address of any part of an object declared with storage-class specifier register cannot be computed, either explicitly (by use of … Read more
Instead of using regexes you could just (for example) separate your string with str.partition(separator) like this: mystring = “hi my name is ryan, and i am new to python and would like to learn more” keyword = ‘name’ before_keyword, keyword, after_keyword = mystring.partition(keyword) >>> before_keyword ‘hi my ‘ >>> keyword ‘name’ >>> after_keyword ‘ is … Read more
It’s because is is a reserved keyword in Kotlin. Since Kotlin is supposed to be interoperable with Java and is is a valid method (identifier) name in Java, the backticks are used to escape the method so that it can be used as a method without confusing it as a keyword. Without it it will … Read more
You can escape with backticks: val `type` = 5