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“Parameter” vs “Argument” [duplicate]
I got parameter and argument kind of mixed up and did not really pay attention to when to use one and when to use the other.
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When to use enumerateObjectsUsingBlock vs. for
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Ultimately, use whichever pattern you want to use and comes more naturally in the context.
While for(... in ...) is quite convenient and syntactically brief, enumerateObjectsUsingBlock: has a number of features that may or may not prove interesting:
enumerateObjectsUsingB...
Java 8 List into Map
...ey is NOT guaranteed to be unique for all elements in the list, you should convert it to a Map<String, List<Choice>> instead of a Map<String, Choice>
Map<String, List<Choice>> result =
choices.stream().collect(Collectors.groupingBy(Choice::getName));
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Error-Handling in Swift-Language
... thing I noticed is that there are no exceptions.
So how do they do error handling in Swift? Has anyone found anything related to error-handling?
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Is cout synchronized/thread-safe?
...ate locking. However, do things like cout get special treatment in the standard library?
4 Answers
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ModelState.IsValid == false, why?
...lowing snippet to find out whats wrong:
(Often if the binder is trying to convert strings to complex types etc)
if (!ModelState.IsValid)
{
var errors = ModelState.SelectMany(x => x.Value.Errors.Select(z => z.Exception));
// Breakpoint, Log or examine the list with Exceptions.
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Get index of selected option with jQuery
... @Joan.bdm jquery does not have selectedIndex property. Adding [0] converts the jquery object to a javascript object which has the selectedIndex property. This example won't work without [0]
– Aram
May 21 '14 at 23:28
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How do I use Linq to obtain a unique list of properties from a list of objects?
...operty. I'd like to be able to do this without looping through each object and pulling out the unique ids that I find.
5 An...
What does dot (.) mean in a struct initializer?
I don't understand this C syntax well. I can't even search because I don't know the syntax's name. What's that?
4 Answers
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How to deal with SQL column names that look like SQL keywords?
...:
select "from" from "table";
Note: Internally PostgreSQL automatically converts all unquoted commands and parameters to lower case. That have the effect that commands and identifiers aren't case sensitive. sEleCt * from tAblE; is interpreted as select * from table;. However, parameters inside do...