global

问题 right i have a sign in button located exactly in the same place on every activity and i have bout 20 activities at the moment but will rise a lot higher soon, and i don't really want to be copying and pasting the same code in to each activity, so I'm looking for a simple, efficient solution to handle the onClick event which will work globally throughout the app. For example, if User A clicks on the sign in button on Activity 1 and signs in, it will show that he is signed in on Activity 2 and

问题 What would be the most appropriate way of sharing the database connection in the below snippet ( the db variable) with my routers/controllers without turning the db variable into a global? var mongo = require('mongoskin'), db = mongo.db(config.db.adress); app.use(function(req, res, next) { db.open(function(err, data) { (err) ? res.send('Internal server error', 500) : next(); }); }); // Setting up controllers here app.post('/users', require('./controllers/users').create); Coming from a PHP

问题 I made a program that gets info in textbox1 and textbox2 after pressing button1. If you type in textbox3 and if what you wrote there is same as textbox1 ,After pressing button2 it puts textbox2's text in the label2.text. But the problem is that it won't put the textbox2.text into label2.text. Why? Here's the code: public partial class Form1 : Form { public Form1() { InitializeComponent(); } ozv[] a = new ozv[5]; int i = 0; private void button1_Click(object sender, EventArgs e) { a[i] = new

问题 I'm trying to call a function from a 5-deep nested function in Typescript, and it's not able to see the outside function. Running console.log(this) inside of setTimeout returns the window object. export class SearchComponent implements OnInit { lifeCycleFunc(){ //Function 1 ... if() { //Function 2 .... var.do(item => { //Function 3 .... var.forEach(var => { //Function 4 ... setTimeout(function(){ //Function 5 this.searchFunc() //this.searchForAssignments is not a function } }) }) } }

问题 I was wondering why I can't access the variable: "variable_for_raw_data" after the function ends. The code is like this: def htmlfrom(Website_URL): import urllib.request response = urllib.request.urlopen(Website_URL) variable_for_raw_data =(input("What will this data be saved as: ")) global variable_for_raw_data variable_for_raw_data = response.read() Now why can't I access the variable "variable_for_raw_data" after the functions ends? Things to note: Python 3.3 urllib NOT urllib2 回答1: It

问题 I hate using global variables, and everyone should. If a language has no way around using global variables it should be updated. Currently, I don't know any good alternative to using global variables in Matlab, when efficiency is the goal. Sharing data between callbacks can be done in only 4 ways that I am aware of: nested functions getappdata (what guidata uses) handle-derived class objects global variables nested functions forces the entire project to be in a single m-file, and handle

问题 Is there anything wrong with connecting and closing to a database by calling the function below with the mysql_query and mysql_fetch_array commands between the two <?php function dbconnect() { $sql = "localhost"; $username = "------"; $password = "-----"; $connection = mysql_connect($sql, $username, $password) or die("unwable to cct"); $databse = mysql_select_db("-------", $connection); global $connection; } function close() { global $connection; mysql_close($connection); } dbconnect();

问题 I'm cleaning up some C code. There are global variables everywhere, but not all of them are used. I want to clean up those. But it's too much work to test them one by one. Is there are easy way to do that? 回答1: You can generate a list of all global variables in your directory using the very helpful ctags(1) command with the -x command line option: ctags -x --c-kinds=v --file-scope=no *.c This can be combined with the also-helpful gid(1) command (assuming you've run mkid(1) on your sources

问题 I have three python files in a project: '''lib.py library file that first defines and also accesses a boolean flag''' vflag = False ... def lib_method() global vflag if not vflag: do_something_here '''app.py main application that sets the boolean flag defined in lib.py''' import lib lib.vflag = method_that_sets_or_resets_vflag() '''processor.py does some processing and needs to access the bool flag''' from lib import * ... def processor_method() global vflag ... if vflag: do_something_here I

问题 I know that the use of $HTTP_GET_VARS is deprecated but what about using $GLOBALS['HTTP_GET_VARS']? Is that array key likely to disappear in the future? I basically have the following all over a legacy project that I need to integrate with a CMS and I don't really want to have to update it unless strictly necessary. function table_manager_import_vars($var) { $vars = explode(",", $var); foreach($vars AS $var) { switch ($var) { case "G": $var = "HTTP_GET_VARS"; break; case "P": $var = "HTTP