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close() seems to be a reserved keyword for channels. Seems a bit strong to make it a built-in, when it could just be a method on a channel, no? Like when creating and closing a file?
I guess the same could be asked for len()?
close is a function that takes a channel as a parameter. Just like new and make, they are functions, and you can name local variables or functions like them.
Keywords are language constructs like struct, type, if, else ...
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Is it possible to take a [...]string{} and then loop over each string to create a new variable where the variable name is the string?
I can do this using interpolation with some other languages, but I'm kind of a golang newbie.
Nope. Go provides no way to dynamically create variables.
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Very basic but can any one tell me what are the new JVM arguments introduces in Java8?
I am not able to find any concrete list over net.
I know about a few of them only (that I got to use), like:
-parameters (for named parameters)
Since the addition of meta-space, these were added (used only a few of them)
InitialBootClassLoaderMetaspaceSize
MaxMetaspaceExpansion
MaxMetaspaceFreeRatio
MaxMetaspaceSize
MetaspaceSize
MinMetaspaceExpansion
MinMetaspaceFreeRatio
UseLargePagesInMetaspace
And one about lambda usage:
-Djdk.internal.lambda.dumpProxyClasses = /Some/Path
I only vaguely know about these two:
MinHeapFreeRatio
MaxHeapFreeRatio
I am absolutely sure there are many more...
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I just regonzied that there are some string methods without an equivalent bang method
formated_index = formated_index.tableize
I assumed I just can write ...
formated_index.tableize!
... but I cann't :-(
Same for String::underscore and other String::*ize methods.
So some exist while others like downcase! or next! exist. Why is this so inconsistent handled in ruby?
tableize, humanize, pluralize are not Ruby methods but ActiveSupport extensions to String class which do not have bang variants.
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Is it best practice to access module methods with a dot (.) or the scope resolution operator (::)?
I know both work and I understand the purpose of ::, I would just like to know which to favour when accessing module methods and why.
Note: There is a related question here which goes into this topic, but not into which is better form.
Both work but the Calling Methods docs suggest that you should use :: for namespaces:
You may also use :: to designate a receiver, but this is
rarely used due to the potential for confusion with ::
for namespaces.
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I have looked at various ways of saving data. I have a 'Products' class which has properties such as ID, Name, and Price. What is the bast way to save this data as new products are added to the application? Should I be looking at databases, arrays, or both, or something else?
Temporary : Arrays, Dictionary with a model.
Permanent : Plist, CoreData-SQLite, Server(ex-Java)-Database(MySQL, Oracle...).
Even for permanent you need Arrays/Dictionaries of model.
Now choice is yours, how you want to proceed.