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Scala constructor overload?
...at the primary constructor is the sole point of entry to the class.
class Foo(x: Int, y: Int, z: String) {
// default y parameter to 0
def this(x: Int, z: String) = this(x, 0, z)
// default x & y parameters to 0
// calls previous auxiliary constructor which calls the primary cons...
Difference between using bean id and name in Spring configuration file
...fy exactly one id. Conventionally these names are alphanumeric ('myBean', 'fooService', etc), but may special characters as well. If you want to introduce other aliases to the bean, you can also specify them in the name attribute, separated by a comma (,), semicolon (;), or white space. As a histori...
Is using 'var' to declare variables optional? [duplicate]
... it's like you're talking about a variable that you have used before.
var foo = 'first time use';
foo = 'second time use';
With regards to scope, it is not true that variables automatically become global. Rather, Javascript will traverse up the scope chain to see if you have used the variable bef...
Why would a static nested interface be used in Java?
...ce code.
Either way, the developer is simply declaring an interface named Foo.Bar. There is no further association with the enclosing class, except that code which cannot access Foo will not be able to access Foo.Bar either. (From source code - bytecode or reflection can access Foo.Bar even if Foo ...
When can I use a forward declaration?
...are a member to be a pointer or a reference to the incomplete type:
class Foo {
X *p;
X &r;
};
Declare functions or methods which accept/return incomplete types:
void f1(X);
X f2();
Define functions or methods which accept/return pointers/references to the incomplete type (but wit...
Closure in Java 7 [closed]
...lation to Java, in the hope to be useful:
//ECMAScript
var f, g;
function foo() {
var x = 0;
f = function() { return ++x; };
g = function() { return --x; };
x = 1;
print('inside foo, call to f(): ' + f()); // "2"
}
foo();
print('call to g(): ' + g()); // "1"
print('call to f(): ' + f())...
京东天天果园与“褚橙”从合作演变成打假 - 资讯 - 清泛网 - 专注C/C++及内核技术
...观规律影响，甜酸比相对11月10日以后成熟的果子略低，这个属于正常现象。
与此同时，伴随着这几年“褚橙”的红火盛况，打假难题也一直困扰着“褚橙”的正牌经销商。例如，今年本来生活销售的“褚橙”，每个上面都贴上...
What is the difference between 'typedef' and 'using' in C++11?
...C++03) (init. statement in for loop iteration statements).
for(typedef int Foo; Foo{} != 0;) {}
// C++17 (if and switch initialization statements).
if (typedef int Foo; true) { (void)Foo{}; }
// ^^^^^^^^^^^^^^^ init-statement
switch(typedef int Foo; 0) { case 0: (void)Foo{}; }
// ^^^^^^^^^^^^...
SELECT DISTINCT on one column
...RDER BY ID) AS RowNumber
FROM MyTable
WHERE SKU LIKE 'FOO%') AS a
WHERE a.RowNumber = 1
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What techniques can be used to speed up C++ compilation times?
...ample, if you have a class,
template <typename T, typename U>
struct foo { };
and both of T and U can have 10 different options, you have increased the possible template instantiations of this class to 100. One way to resolve this is to abstract the common part of the code to a different clas...