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cannot convert data (type interface {}) to type string: need type assertion
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edited Jun 8 '15 at 18:32
answered Jan 12 '13 at 2:25
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Lambda Expression and generic method
...the method in the functional interface has type parameters. See section §15.27.3 in JLS8:
A lambda expression is compatible [..] with a target type T if T is a functional interface type (§9.8) and the expression is congruent with the function type of [..] T. [..] A lambda expression is congrue...
Differences between Microsoft .NET 4.0 full Framework and Client Profile
...n files are 237 MB and 194 MB respectively, and once installed, they are 537 MB and 427 MB.
4 Answers
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SQL Server indexes - ascending or descending, what difference does it make?
...ex on a column or number of columns in MS SQL Server (I'm using version 2005), you can specify that the index on each column be either ascending or descending. I'm having a hard time understanding why this choice is even here. Using binary sort techniques, wouldn't a lookup be just as fast either wa...
How to get highcharts dates in the x axis?
... L): Hours in 12h format, 1 through 11.
%M: Two digits minutes, 00 through 59.
%p: Upper case AM or PM.
%P: Lower case AM or PM.
%S: Two digits seconds, 00 through 59
http://api.highcharts.com/highcharts#xAxis.dateTimeLabelFormats
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What is a 'semantic predicate' in ANTLR?
...ws Exception {
ANTLRStringStream in = new ANTLRStringStream("123, 456, 7 , 89");
NumbersLexer lexer = new NumbersLexer(in);
CommonTokenStream tokens = new CommonTokenStream(lexer);
NumbersParser parser = new NumbersParser(tokens);
parser.parse();
}
}
T...
Why is “Set as Startup” option stored in the suo file and not the sln file?
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5 Answers
5
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How to play with Control.Monad.Writer in haskell?
...t:
ghci> let multWithLog = do { a <- logNumber 3; b <- logNumber 5; return (a*b) }
:: Writer [String] Int
(Input actually entered all on one line). Here I've specified the type of multWithLog to be Writer [String] Int. Now I can run it:
ghci> runWriter multWithLog
(15, ["Got numb...
Using jQuery how to get click coordinates on the target element
... /> mouse<br/>position </div>
<div id="C" style="left:500px;"> position() <br /> mouse<br/>position </div>
</body>
JavaScript
$(document).ready(function (e) {
$('#A').click(function (e) { //Default mouse Position
alert(e.pageX + ' , ' ...
Does Flask support regular expressions in its URL routing?
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if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0', port=5000)
this URL should return with 200: http://localhost:5000/abc0-foo/
this URL should will return with 404: http://localhost:5000/abcd-foo/
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