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Is there any overhead to declaring a variable within a loop? (C++)
...
main(){ int var; while(int i < 100) { var = 4; } }
gcc -S 1.c
1.s:
_main:
pushl %ebp
movl %esp, %ebp
subl $24, %esp
movl $0, -16(%ebp)
jmp L2
L3:
movl $4, -12(%ebp)
L2:
cmpl $99, -16(%ebp)
jle L3
leave
ret
2.c
main() { while(int i &...
ng-app vs. data-ng-app, what is the difference?
...- and data- from the front of the element/attributes. Convert the :, -, or _-delimited name to camelCase. Here are some equivalent
examples of elements that match ngBind:
based on above statement below all are valid directives
1. ng-bind
2. ng:bind
3. ng_bind
4. data-ng-bind
5. x-ng-bind
...
Difference between method and function in Scala
...ethod Value is created from methods, either by postfixing an underscore (m _ is a method value corresponding to the "function declaration" (def) m), or by a process called eta-expansion, which is like an automatic cast from method to function.
That is what the specs say, so let me put this up-front...
Defining custom attrs
...mething and this is how you end up referring to it in code, e.g., R.attr.my_attribute. The format attribute can have different values depending on the 'type' of attribute you want.
reference - if it references another resource id (e.g, "@color/my_color", "@layout/my_layout")
color
boolean
dimensi...
What does passport.session() middleware do?
...r/lib/strategies/session.js
Specifically lines 59-60:
var property = req._passport.instance._userProperty || 'user';
req[property] = user;
Where it essentially acts as a middleware and alters the value of the 'user' property in the req object to contain the deserialized identity of the user. To ...
How to use the 'main' parameter in package.json?
...r example multiple CLI commands (during development accessible under ./node_modules/.bin/<symlink>) check out the "bin" parameter.
– Frank Nocke
Oct 9 '18 at 13:09
...
Java - No enclosing instance of type Foo is accessible
...nt where it is declared.
Let`s try to see the above concepts practically_
public class MyInnerClass {
public static void main(String args[]) throws InterruptedException {
// direct access to inner class method
new MyInnerClass.StaticInnerClass().staticInnerClassMethod();
// static ...
Compelling examples of custom C++ allocators?
...nging a single
std::vector<T>
to
std::vector<T,tbb::scalable_allocator<T> >
(this is a quick and convenient way of switching the allocator to use TBB's nifty thread-private heaps; see page 7 in this document)
...
PostgreSQL create table if not exists
...ns, here is a function to work around it:
CREATE OR REPLACE FUNCTION create_mytable()
RETURNS void
LANGUAGE plpgsql AS
$func$
BEGIN
IF EXISTS (SELECT FROM pg_catalog.pg_tables
WHERE schemaname = 'myschema'
AND tablename = 'mytable') THEN
RAISE NOTICE 'T...
What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
... in the joins and some in the where clause.
– wobbily_col
Sep 14 '15 at 11:05
8
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