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static constructors in C++? I need to initialize private static objects
...t ordinary class.
class StaticStuff
{
std::vector<char> letters_;
public:
StaticStuff()
{
for (char c = 'a'; c <= 'z'; c++)
letters_.push_back(c);
}
// provide some way to get at letters_
};
class Elsewhere
{
static StaticStuff staticSt...
New self vs. new static
...the first method, whereas static is bound to the called class (also see get_called_class()).
class A {
public static function get_self() {
return new self();
}
public static function get_static() {
return new static();
}
}
class B extends A {}
echo get_class(B::ge...
Docker: adding a file from a parent directory
...ole project directory just to accommodate this.
– ben_frankly
Nov 21 '14 at 18:35
As said by @Günter, there is a work...
Annotating text on individual facet in ggplot2
...
Typically you'd do something like this:
ann_text <- data.frame(mpg = 15,wt = 5,lab = "Text",
cyl = factor(8,levels = c("4","6","8")))
p + geom_text(data = ann_text,label = "Text")
It should work without specifying the factor variable comple...
When do we need curly braces around shell variables?
...ing practice. This is both for consistency and to avoid surprises like $foo_$bar.jpg, where it's not visually obvious that the underscore becomes part of the variable name.
share
|
improve this answ...
How can I rotate an HTML 90 degrees?
...
You need CSS to achieve this, e.g.:
#container_2 {
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-o-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(90deg);
}
Demo:
#container_2 {
width: 100px;
...
SQL Server Installation - What is the Installation Media Folder?
...se that one when you "Browse for SQL server Installation Media"
SQLEXPRADV_x64_ENU.exe > SQLEXPRADV_x64_ENU.zip
7zip will open it (standard Windows zip doesn't work though)
Extract to something like C:\SQLInstallMedia
You will get folders like 1033_enu_lp, resources, x64 and a bunch of files....
Primary key or Unique index?
.... Example:
CREATE TABLE table1 (foo int, bar int);
CREATE UNIQUE INDEX ux_table1_foo ON table1(foo); -- Create unique index on foo.
INSERT INTO table1 (foo, bar) VALUES (1, 2); -- OK
INSERT INTO table1 (foo, bar) VALUES (2, 2); -- OK
INSERT INTO table1 (foo, bar) VALUES (3, 1); -- OK
INSERT INTO...
How to autosize a textarea using Prototype?
...ns)
{
this.textarea = $(textarea);
this.options = $H({
'min_height' : 30,
'max_length' : 400
}).update(options);
this.textarea.observe('keyup', this.refresh.bind(this));
this._shadow = new Element('div').setStyle({
lineHeight : this.textarea.getStyle('lineHe...
How to check whether a file or directory exists?
...iven file or directory exists
func exists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil { return true, nil }
if os.IsNotExist(err) { return false, nil }
return false, err
}
Edited to add error handling.
...