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cannot convert data (type interface {}) to type string: need type assertion
...assertion in golang, and it is a common practice.
Here is the explanation from a tour of go:
A type assertion provides access to an interface value's underlying concrete value.
t := i.(T)
This statement asserts that the interface value i holds the concrete type T and assigns the underlyi...
Lambda Expression and generic method
...l must be able to tell such a lambda expression with type parameters apart from other legal Java constructs. Thus you have to resort to method references. The target method can declare type parameters using an established syntax.
– Holger
Dec 16 '15 at 10:48
...
How to check command line parameter in “.bat” file?
... of the double quotes, but a display of a neat feature of stripping quotes from the argument variable, if the first and last character is a double quote.
This "technology" works just as well with square brackets:
if [%~1]==[] (...)
It was a useful thing to point this out, so I also upvote the ne...
What does $(function() {} ); do?
...ction, which is prefixed with the $ or the word jQuery generally is called from within that method.
$(document).ready(function() {
// Assign all list items on the page to be the color red.
// This does not work until AFTER the entire DOM is "ready", hence the $(document).rea...
Is Java RegEx case-insensitive?
...E flag is (?i) not \?i. Note also that one superfluous \b has been removed from the pattern.
The (?i) is placed at the beginning of the pattern to enable case-insensitivity. In this particular case, it is not overridden later in the pattern, so in effect the whole pattern is case-insensitive.
It i...
AngularJS directive with default options
... Remember, that attributes needs the values as they would be passed from the template. If you're passing an array f.e. it should be attributes.foo = '["one", "two", "three"]' instead of attributes.foo = ["one", "two", "three"]
– Dominik Ehrenberg
Apr 22 ...
How to create ENUM type in SQLite?
I need to convert a table from MySQL to SQLite, but I can't figure out how to convert an enum field, because I can't find ENUM type in SQLite.
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Do I need to manually close an ifstream?
...ream object destructs, it also calls the destructor on basic_filebuf. And from the standard (27.8.1.2), that destructor closes the file:
virtual ˜basic_filebuf();
Effects: Destroys an object of class basic_filebuf<charT,traits>. Calls close().
...
What is the most efficient way to store tags in a database?
...ld create a TagCategory table consisting of category_id and category_name. From there, I would append a category_id field to the Tags table and perform a join on that.
– Simon Scarfe
Feb 13 '11 at 15:14
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How do I negate a test with regular expressions in a bash script?
...have not seen enough bash scripting examples to feel comfortable deviating from (my understanding of) the cookbook.
– David Rogers
Dec 28 '10 at 16:33
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