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What is the difference between char s[] and char *s?
...So:
char *x = "Foo";
// is approximately equivalent to:
static const char __secret_anonymous_array[] = "Foo";
char *x = (char *) __secret_anonymous_array;
Note that you must not ever attempt to modify the contents of this anonymous array via this pointer; the effects are undefined (often meaning ...
I want to get the type of a variable at runtime
...ific type, such as this:
val x: Any = 5
def f[T](v: T) = v match {
case _: Int => "Int"
case _: String => "String"
case _ => "Unknown"
}
f(x)
Here it doesn't matter what is the type of the variable, Any. What matters, what is checked is the type of 5, the value. In fact,...
To underscore or to not to underscore, that is the question
...
I use _ only for private fields, however I almost never have private fields due to 3.5 auto property. Generally the only time I have a private field is if I implement lazy loading on non-primitive types.
– Chr...
How to move a model between two Django apps (Django 1.7)
...ration to remove model from 1st app.
$ python manage.py makemigrations old_app --empty
Edit migration file to include these operations.
class Migration(migrations.Migration):
database_operations = [migrations.AlterModelTable('TheModel', 'newapp_themodel')]
state_operations = [migration...
Extending an Object in Javascript
...new instantiation (read why you shouldn't use new), no super, no self-made __construct. You simply create Objects and then extend or morph them.
This pattern also offers immutability (partial or full), and getters/setters.
TypeScript
The TypeScript equivalent looks the same:
interface Person {
...
How to set custom header in Volley Request
...id.volley.toolbox.StringRequest {
private final Map<String, String> _params;
/**
* @param method
* @param url
* @param params
* A {@link HashMap} to post with the request. Null is allowed
* and indicates no parameters will be posted along with request.
* @param li...
How do you disable the unused variable warnings coming out of gcc in 3rd party code I do not wish to
...ut the stuff you have no control over.
For example, instead of -IC:\\boost_1_52_0, say -isystem C:\\boost_1_52_0.
Hope it helps. Good Luck!
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How to “EXPIRE” the “HSET” child key in redis?
... mentioning:
When having a hash, the structure basically looks like:
hash_top_key
- child_key_1 -> some_value
- child_key_2 -> some_value
...
- child_key_n -> some_value
Since we want to add TTL to the child keys, we can move them to top keys. The main point is that the key now ...
Is Java “pass-by-reference” or “pass-by-value”?
... :-)
Step one please erase from your mind that word that starts with 'p' "_ _ _ _ _ _ _", especially if you come from other programming languages. Java and 'p' cannot be written in the same book, forum, or even txt.
Step two remember that when you pass an Object into a method you're passing the Ob...
How do I find files with a path length greater than 260 characters in Windows?
...and then add a guide at position 260
In powershell cmd /c dir /s /b |? {$_.length -gt 260}
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