The nicest solution I’ve found is http://bloggablea.wordpress.com/2007/05/01/global-hotkeys-with-net/ Hotkey hk = new Hotkey(); hk.KeyCode = Keys.1; hk.Windows = true; hk.Pressed += delegate { Console.WriteLine(“Windows+1 pressed!”); }; hk.Register(myForm); Note how you can set different lambdas to different hotkeys
Every “variable” in python is limited to a certain scope. The scope of a python “file” is the module-scope. Consider the following: #file test.py myvariable = 5 # myvariable has module-level scope def func(): x = 3 # x has “local” or function level scope. Objects with local scope die as soon as the function … Read more
It’s possible that launching of ACTION_IMAGE_CAPTURE will push your activity out of memory. You should check (I’d simply a log, debugger may have its own side effects) that onCreate() of your activity is called before onActivityResult(). If this is the case, you should prepare your activity to reinitialize itself, probably using onSaveInstanceState(Bundle). Note that the … Read more
Node’s REPL is global. Code from a file is in a “module”, which is really just a function. Your code file turns into something like this very simplified example: var ctx = {}; (function(exports) { // your code console.log(this === global); }).call(ctx, ctx); Notice that it’s executed using .call(), and the this value is set … Read more
Well, you can use the typeof operator, and if the identifier doesn’t exist in any place of the scope chain, it will not throw a ReferenceError, it will just return “undefined”: if (typeof ModuleName != ‘undefined’) { //… } Remember also that the this value on Global code, refers to the global object, meaning that … Read more
Because that’s the way it is, according to the C Standard. The reason for that is efficiency: static variables are initialized at compile-time, since their address is known and fixed. Initializing them to 0 does not incur a runtime cost. automatic variables can have different addresses for different calls and would have to be initialized … Read more
Update of 2018-10-10: The most succinct way to carry out this specific task is to use list2env() like so: ## Create an example list of five data.frames df <- data.frame(x = rnorm(25), g = rep(factor(LETTERS[1:5]), 5)) LIST <- split(df, df$g) ## Assign them to the global environment list2env(LIST, envir = .GlobalEnv) ## Check that it … Read more
The $GLOBALS array can be used instead: $GLOBALS[‘a’] = ‘localhost’; function body(){ echo $GLOBALS[‘a’]; } From the Manual: An associative array containing references to all variables which are currently defined in the global scope of the script. The variable names are the keys of the array. If you have a set of functions that need … Read more
If you need a global cross-module variable maybe just simple global module-level variable will suffice. a.py: var = 1 b.py: import a print a.var import c print a.var c.py: import a a.var = 2 Test: $ python b.py # -> 1 2 Real-world example: Django’s global_settings.py (though in Django apps settings are used by importing … Read more
This is a pretty famous difference between Windows and Unix-like systems. No matter what: Each process has its own address space, meaning that there is never any memory being shared between processes (unless you use some inter-process communication library or extensions). The One Definition Rule (ODR) still applies, meaning that you can only have one … Read more