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Shortcut to switch between design and text in Android Studio
Does anyone know some shortcut to switch between design and text in android studio while editing XML layout?
14 Answers
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Python function global variables?
I know I should avoid using global variables in the first place due to confusion like this, but if I were to use them, is the following a valid way to go about using them? (I am trying to call the global copy of a variable created in a separate function.)
...
How to check if a table exists in a given schema
...ore slightly faster.
to_regclass(rel_name) in Postgres 9.4+
Much simpler now:
SELECT to_regclass('schema_name.table_name');
Same as the cast, but it returns ...
... null rather than throwing an error if the name is not found
...
Sort JavaScript object by key
...never matched implementation reality, and have officially become incorrect now that the ES6/ES2015 spec has been published.
See the section on property iteration order in Exploring ES6 by Axel Rauschmayer:
All methods that iterate over property keys do so in the same order:
First all ...
Can gcc output C code after preprocessing?
...in.c
main.c
#define INC 1
int myfunc(int i) {
return i + INC;
}
and now, besides the normal output main.o, the current working directory also contains the following files:
main.i is the desired prepossessed file containing:
# 1 "main.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 ...
How to set a Fragment tag by code?
...iner, new DemoFragment(), "SOMETAG").
commit();
// Now later we can lookup the fragment by tag
DemoFragment fragmentDemo = (DemoFragment)
getSupportFragmentManager().findFragmentByTag("SOMETAG");
}
}
}
...
What is the point of function pointers?
...couple of void pointers to sortable data and a pointer to a function that knows how to compare two elements of these data structures. This allows us to create our function of choice for the job, and in fact even allows for choosing the comparison function at run time, e.g. for sorting ascending or d...
What does “coalgebra” mean in the context of programming?
...ust the empty tuple (). So we can actually simplify the idea of an algebra now: it's just some type with some number of functions on it.
An algebra is just a common pattern in mathematics that's been "factored out", just like we do with code. People noticed that a whole bunch of interesting things...
Catch Ctrl-C in C
...ither use sig_atomic_t or atomic_bool types there. I just missed that one. Now, since we are talking: would you like me to rollback my latest edit? No hard feelings there it would be perfectly understandable from your point of view :)
– Peter Varo
May 18 '17 at...
How To Check If A Key in **kwargs Exists?
...: Always just pass-through arguments you don't understand, and don't even know if they exist. If you always pass through *args and **kwargs you make your code slower, and requires a bit more typing, but if interfaces of the called function (in this case print) changes, you don't need to change your ...