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Java “lambda expressions not supported at this language level”
... Project, change Project Language Level to 8.0 - Lambdas, type annotations etc.
For Android 3.0+ Go File → Project Structure → Module → app and In Properties Tab set Source Compatibility and Target Compatibility to 1.8 (Java 8)
Screenshot:
...
Why do loggers recommend using a logger per class?
...ivate static readonly ILog _logger =
LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
public void SomeMethod()
{
_logger.DebugFormat("File not found: {0}", _filename);
}
One logger per app (or similar)
Logger.DebugFormat("File not found: {0}", _filename); // Logger...
How to convert JSON to XML or XML to JSON?
... XML child-element. You would consume these two differently in JavaScript, etc. Different examples of XML conforming to the same schema can produce actually different JSON structures this way. You can add the attribute json:Array='true' to your element to workaround this in some (but not necessarily...
How to sign an android apk file
...wizard:
Make a new key-store. remember that password
Sign your app
Save it etc.
Also, from the link:
Compile and sign with Eclipse ADT
If you are using Eclipse with the ADT
plugin, you can use the Export Wizard
to export a signed .apk (and even
create a new keystore, if necessary).
...
Are duplicate keys allowed in the definition of binary search trees?
... the count? What if the tree needs to rebalance that node to a lower level etc.?
– Andrew
Sep 16 at 1:01
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Sort Go map values by keys
...ys, k)
}
sort.Strings(keys) # or sort.Ints(keys), sort.Sort(...), etc., per <K>
for _, k := range keys {
v := m[k]
f(k, v)
}
}
Then call it with the input map and a function (taking (k <K>, v <V>) as its input arguments) that is called over the ma...
Removing colors from output
...le numbers separated with semi-colons (for background color, bold, italic, etc...). This command worked for me: sed -r "s/[[:cntrl:]]\[([0-9]{1,3};)*[0-9]{1,3}m//g"
– saeedgnu
Jul 27 '18 at 3:22
...
Django. Override save for model
... nice with all pseudo-auto django tools (Example: ModelForm, contrib.admin etc).
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How to delete an object by id with entity framework
...ocks for different exception types, add more custom checks using if blocks etc.).
[I am using this code in a MVC .Net Core/.Net Core project with Entity Framework Core.]
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NoSql Crash Course/Tutorial [closed]
...ave a solid understanding of why you would use it (from here, Wikipedia, etc). This could be due to the lack of concrete and uniform definition of what it is (more of a paradigm than concrete implementation), but I'm struggling to wrap my head around how I would go about designing a system that w...