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How to access a global variable within a local scope?

由 故事扮演 提交于 2019-11-27 00:55:51
问题 This is my code #include <iostream> using namespace std; int x = 5; int main() { int x = 1; cout << "The variable x: " << x << endl; } I get as output 1 , but I would like to have 5 , as in accessing the global x variable. Is this possible? 回答1: You should be using ::x in order to access global variable in local scope. The operator :: is unary scope resolution operator. So your code should be: #include <iostream> using namespace std; int x = 5; int main() { int x = 1; cout << "The variable x:

How can I correct MySQL Load Error

由 核能气质少年 提交于 2019-11-27 00:52:51
I'm not quite sure a similar question to this was closed by I'm trying to execute the following MySQL program. mysql -e "load data local infile \ '/tmp/ept_inventory_wasp_export_04292013.csv' into \ table wasp_ept_inv fields terminated by ',' \ lines terminated by '\n' ;" at the bash command line and get this error ERROR 1148 (42000) at line 1: The used command is not allowed with this MySQL version How can I work around this problem? I am actually running this command from a Python program, but pulled the command out to try fiddling with it at the bash command line. I've seen how I can modify

How can I debug spark application locally?

由 柔情痞子 提交于 2019-11-27 00:14:14
问题 I am very new to spark and I just would like to learn step by step how to debug a spark application locally? Could anyone please detail the steps needed to do this? I can run the simpleApp on the spark website locally from the command line but I just need to step through the code and see how it works. Any help is very much appreciated. Thank you. 回答1: As David Griffin mentioned, using spark-shell can be very helpful. However, I find that doing actual local debugging, setting break points,

How to make a local variable (inside a function) global [duplicate]

由 主宰稳场 提交于 2019-11-26 22:39:06
Possible Duplicate: Using global variables in a function other than the one that created them I'm using functions so that my program won't be a mess but I don't know how to make a local variable into global. Here are two methods to achieve the same thing: Using parameters and return (recommended) def other_function(parameter): return parameter + 5 def main_function(): x = 10 print x x = other_function(x) print x When you run main_function , you'll get the following output >>> 10 >>> 15 Using globals (never do this) x = 0 # The initial value of x, with global scope def other_function(): global

Android Development: Using Image From Assets In A WebView's HTML

由 南楼画角 提交于 2019-11-26 22:13:28
In my app I'm making a basic HTML help document. I wanted my app's logo in the HTML img tag itself, but I don't know how I'd reference to the logo which will be stored in assets. Is this possible, if so how? Thanks for the help! Put your Logo into the assets directory eg: assets/logo.png Then load your html with: webView.loadDataWithBaseURL("file:///android_asset/", htmlData, "text/html", "utf-8", null); Reference your img like: <img src="logo.png"> Store the images in assets folder: Read the image in the html from assets with file:///android_asset/ for example: String sHtmlTemplate = "<html>

Access all local variables

由 半城伤御伤魂 提交于 2019-11-26 21:15:39
问题 Every global variable in javascript is a property of 'window' Apparently all local variable (aswell as arguments) are stored as properties of the 'Call object' (See chapter 4.6.2 of each function. Persumably only existing for the lifetime of said function. Basically I want to be able to do for (var obj in CallObject ) { // } Can I access said object containing local variables and if so how? Alternatively is there any other way of accessing all local variables of a function. [Edit] It turns

D3 Bar Graph example not working locally

由 你。 提交于 2019-11-26 20:48:02
I am very new to D3, and wanted to see how an example would work locally. I copied and pasted the bar graph code to a local file called index.html, and also copied over the data.tsv. For some reason, absolutely nothing is showing up when I open the file on a browser! I tried changing the script src to "d3/d3.v3.min.js" because that is the folder the d3 I downloaded is in. However, this does not work either. For every example I have tried I have yet to successfully view a D3 example. Help would be appreciated! The index.html code is as follows: <meta charset="utf-8"> <style> body { font: 10px

Namespaces with Module Imports

由 拟墨画扇 提交于 2019-11-26 20:38:02
I am learning Python and am still a beginner, although I have been studying it for about a year now. I am trying to write a module of functions which is called within a main module. Each of the functions in the called module needs the math module to run. I am wondering if there is a way to do this without importing the math module inside the called module. Here is what I have: main.py : from math import * import module1 def wow(): print pi wow() module1.cool() module1.py : def cool(): print pi When running main.py I get: 3.14159265359 Traceback (most recent call last): File "Z:\Python\main.py"

iphone local notification in simulator

由 泪湿孤枕 提交于 2019-11-26 19:18:26
问题 I just downloaded xcode and trying to make local notification example. The question is if local notification works in simulator? thank you 回答1: Yes, local notifications work with the simulator. However, make sure you are implementing application:didreceiveLocalNotification in your app delegate if you want to see the notification while your app is in the foreground: - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification { UIAlertView

jqGrid Subgrid with “local” Data

由 纵然是瞬间 提交于 2019-11-26 19:02:49
I'm trying to get my subgrid to work with local data. However, when I click expand, I just get a Loading box like the grid is attempting to pull the data from somewhere. I'm assuming I don't need a subGridUrl since the master grid's datatype is datatype:'local' . Is there anything else I should be doing? There are no direct way to define subgrid with local data, but you can relatively easy implement the same behavior using subGridRowExpanded ( Subgrid as Grid ). What one need to do is just to get from some you internal structures the data for the subgrid by the rowid of the grid. For example
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