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“new” keyword in Scala
...r to a class's own constructor:
class Foo { }
val f = new Foo
Omit new if you are referring to the companion object's apply method:
class Foo { }
object Foo {
def apply() = new Foo
}
// Both of these are legal
val f = Foo()
val f2 = new Foo
If you've made a case class:
case class Foo()
...
How do you run a single query through mysql from the command line?
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Also, if you want to strip the header and table format you can use mysql -u <user> -p -B --disable-column-names -e 'select * from schema.table'
– dvlcube
Oct 11 '17 at 18:40
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How to make link look like a button?
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This only works for me if I apply it to a tag directly (a {display: block ...}), which is not acceptable. Do you have any idea why class attribute inside a tag won't work? :( I'm using Firefox 27. I also tried a.button {...} and it doesn't work eit...
How do I check if file exists in jQuery or pure JavaScript?
How do I check if a file on my server exists in jQuery or pure JavaScript?
17 Answers
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Is it safe to assume strict comparison in a JavaScript switch statement?
...ake a look at ECMA 262, section 12.11, the second algorithm, 4.c.
c. If input is equal to clauseSelector as defined by the === operator, then...
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How to use index in select statement?
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If you want to test the index to see if it works, here is the syntax:
SELECT *
FROM Table WITH(INDEX(Index_Name))
The WITH statement will force the index to be used.
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Can I implement an autonomous `self` member type in C++?
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class WITH_SELF(Foo)
{
void test()
{
self foo;
}
};
If you want to derive from Foo then you should use the macro WITH_SELF_DERIVED in the following way:
class WITH_SELF_DERIVED(Bar,Foo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you...
invalid command code ., despite escaping periods, using sed
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If you are on a OS X, this probably has nothing to do with the sed command. On the OSX version of sed, the -i option expects an extension argument so your command is actually parsed as the extension argument and the file path...
Convert Long into Integer
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Integer i = theLong != null ? theLong.intValue() : null;
or if you don't need to worry about null:
// auto-unboxing does not go from Long to int directly, so
Integer i = (int) (long) theLong;
And in both situations, you might run into overflows (because a Long can store a wider ran...
ResourceDictionary in a separate assembly
...cations. I could add them to the applications' assemblies, but it's better if I compile these resources in one single assembly and have my applications reference it, right?
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