variables

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . def loop(): d = 0 for x in range(12): d+=1 #this 'd' is not the same as the one above. print(d) In the code above, wouldn't the local variable of the function still be 0? How can I change this to use the function variable instead of the internal variable of the loop? 回答1: I think you've gotten

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . def loop(): d = 0 for x in range(12): d+=1 #this 'd' is not the same as the one above. print(d) In the code above, wouldn't the local variable of the function still be 0? How can I change this to use the function variable instead of the internal variable of the loop? 回答1: I think you've gotten

问题 In TCL, I'm writing a procedure that returns the depth of a clock. But since I have several clocks I want to name the var: depth_$clk proc find_depth {} { foreach clk $clocks { … set depth_$clk $max_depth echo $depth_$clk } } But I get: Error: can't read "depth_": no such variable Use error_info for more info. (CMD-013) 回答1: Your problem is this line: echo $depth_$clk The issue is that the syntax for $ only parses a limited set of characters afterwards for being part of the variable name; the

问题 I have Eclipse Helios with a java program set up. I'm attempting to create two environment variables ReportingManagerHome=C:\rp ReportingManagerConfig=${ReportingManagerHome}\config I then run my program with System.out.println(System.getenv("ReportingManagerConfig")); Eclipse doesn't even call the java compiler. It throws up a pop up window with the error that environment variable ReportingManagerHome is not defined. I understand that since the java compiler has yet to be called, technically

问题 This code down never call alert 'ane is true' . It is possible to change local variable 'ane' from jQuery method "animate" ? In my code variable 'ane' is always false. I try this method for change of 'ane' value: function anim() { var ane = false; $('#element').animate({left:'100px'}, 5000, function(){ ane = true; }); while(!ane){} alert('ane is true'); } This also does not work for me: function anim() { var ane = false; var ant = function(){ ane = true; } $('#element').animate({left:'100px'}

问题 So I have a variable "woeid" that I'm am trying to put in for the value of "w" - $.YQL("select * from rss where url='http://weather.yahooapis.com/forecastrss?w="+woeid"'",function(data){ Why won't it work? Edit: The whole script - <script> $(document).ready(function() { $.YQL = function(query, callback) { var encodedQuery = encodeURIComponent(query.toLowerCase()), url = 'http://query.yahooapis.com/v1/public/yql?q=' + encodedQuery + '&format=json&callback=?'; $.getJSON(url, callback); }; $.YQL

问题 I've got a variable, let's say $x and it holds the value of website.com . I want to be able to call the variable and apply shell color to it like so: echo -e '\033[1;32m$x:\033[0m'; The problem is not the color, however, it's how the script it interpretting the output. So the output I'm getting is: $x: I need the output to obviously be the string in the variable, and not the variable name. Is there any way around this issue? 回答1: You need to use " instead of ' . So it should be: echo -e "\033

问题 Im trying to make a function to run it later. In php 5.3.2-1 it works fine. But in 5.1.6 it doesn't. The code is: $func = function(){ echo "Hello!"; }; echo "Before Hello"; $func(); Does anyone knows how to emulate this in 5.1.6? Thanks. Eduardo 回答1: Anonymous functions are available since PHP 5.3. You cannot use them in older versions. Take a look at the docs. 回答2: $func = create_function('','echo "Hello!";'); echo "Before Hello"; $func(); to be able to "assign a function to a variable",

问题 The manual on "extract" shows you can extract an array like: extract(array('one'=>1,'two'=>2)); into $one,$two... But the extract function doesn't return the variables. Is there a way to 'globalize' these variables? Maybe not using extract, but a foreach loop? EDIT: (explanation about what I'm trying to achieve) I have an array containing hundreds of output messages which I want to have accessible as variables efficiently. What I mean is that whenever I want to output a message, say:

问题 What is the proper way to concatenate text and a variable in PHP inside a mysql_query? Here is my attempt: page.'$pageID' I want it to output page3 . Here is all of the code (simplified to focus on the mysql_query): if ($_POST['pageProgress']) { $pageProgress = $_POST['pageProgress']; $pageID = 3; $userID = 1; $updateUserProgress = mysql_query("UPDATE test SET page.'$pageID'='$pageProgress' WHERE userID='$userID'") or die(mysql_error()); } All of the code works perfectly if I simply replace