infinite-loop | 易学教程

How to catch login failures with PySVN?

阅读更多关于 How to catch login failures with PySVN?

问题 I'm new to Python and PySVN in general, and I'm trying to export my SVN repository using pysvn. Here's my code: #set up svn login data def svn_credentials (realm, username, may_save): return True, svn_login_name, svn_login_password, False #establish connection svn_client = pysvn.Client () svn_client.callback_get_login = svn_credentials #export data svn_client.export('server-path-goes-here', 'client-path-goes-here', force=True) Which works fine, but if the password is wrong or the user name is

How Do I Safely Scan for Integer Input? [duplicate]

阅读更多关于 How Do I Safely Scan for Integer Input? [duplicate]

问题 This question already has answers here : How to use Scanner to accept only valid int as input (6 answers) How to handle infinite loop caused by invalid input (InputMismatchException) using Scanner (5 answers) Closed last year . Scanner scanner = new Scanner(); int number = 1; do { try { option = scanner.nextInt(); } catch (InputMismatchException exception) { System.out.println("Integers only, please."); } } while (number != 0); Despite the exception handling, this code will enter an infinite

Entity Framework Navigation Properties looping issue though WCF

阅读更多关于 Entity Framework Navigation Properties looping issue though WCF

问题 I have a model like public class User { [Key] public long UserId { get; set; } [Required] public String Nickname { get; set; } public virtual ICollection<Group> Memberships { get; set; } } public class Group { [Key] public long GroupId { get; set; } [Required] public String Name { get; set; } public virtual ICollection<User> Members { get; set; } } public class DataContext : DbContext { public DbSet<User> Users { get; set; } public DbSet<Group> Groups { get; set; } public DataContext() {

How would I find an infinite loop in an array of pointers?

阅读更多关于 How would I find an infinite loop in an array of pointers?

I have an array of pointers (this is algorithmic, so don't go into language specifics). Most of the time, this array points to locations outside of the array, but it degrades to a point where every pointer in the array points to another pointer in the array. Eventually, these pointers form an infinite loop. So on the assumption that the entire array consists of pointers to another location in the array and you start at the beginning, how could you find the length of the loop with the highest efficiency in both time and space? I believe the best time efficiency would be O(n), since you have to

My cin is being ignored inside a while loop

阅读更多关于 My cin is being ignored inside a while loop

问题 I am trying to code a simple question and number checker into my first C++ program. Problem is, when I type a string like one two, or three, the program becomes and infinite loop and it ignores the cin function to re-assign lives to a number. cout << "How many lives would you like 1 (hard), 2 (medium), or 3 (easy)?" << endl; cin >> lives; while(lives != 1 && lives != 2 && lives != 3 && !isdigit(lives)) { cout << "You need to input a number, not words." << endl; cout << "How many lives would

How to stop infinite loop in bash script gracefully?

阅读更多关于 How to stop infinite loop in bash script gracefully?

问题 I need to run application in every X seconds, so, as far as cron does not work with seconds this way, I wrote a bash script with infinite loop having X seconds sleep in it. When I have to stop the running script manually, I would like to do it in a correct way - let the application complete functioning and just do not enter the loop for the next time. Do you have any idea, how this can be achieved? I thought about passing arguments, but I could not find how to pass argument to running script.

C++ Input a char instead of int lead to endless loop. How to check the wrong input?

阅读更多关于 C++ Input a char instead of int lead to endless loop. How to check the wrong input?

问题 One part of my program: Let user input a series of integer, and then put them into an array. int n=0; cout<<"Input the number of data："; cin>>n; cout<<"Input the series of data："; int a[50]; for(i=0; i<n; i++) { cin>>a[i]; } Then, when user input wrong data such as a character 'a' or 'b'. The program will go into an infinite loop. How to catch the wrong cin? How to clear the buffer and give user the chance to input a right data again? 回答1: Simply check if the input is a number first and then

How to get nested array length in Javascript?

阅读更多关于 How to get nested array length in Javascript?

问题 I have an example of nested array: var testArray = [1,2,[3,4,[5,6],7],8,9,[10,11],12]; Here is my function for getting nested array length: Array.prototype.getLength = function() { var sum = 0; function getMultiLength(array) { for (count = 0; count < array.length; count ++) { sum ++; if (!array[count].length) { getMultiLength(array[count]); } } } getMultiLength(this.valueOf()); return sum; }; My expectation for result would be 12, but instead what I got is infinite loop: testArray.getLength()

When test hanging in an infinite loop

阅读更多关于 When test hanging in an infinite loop

I'm tokenising a string with XSLT 1.0 and trying to prevent empty strings from being recognised as tokens. Here's the entire function, based on XSLT Cookbook : <xsl:template name="tokenize"> <xsl:param name="string" select="''" /> <xsl:param name="delimiters" select="';#'" /> <xsl:param name="tokensplitter" select="','" /> <xsl:choose>  <xsl:when test="not($string)" />  <xsl:when test="not($delimiters)"> <xsl:call-template name="_tokenize-characters"> <xsl:with-param name="string" select="$string"

animations on infinite loop

阅读更多关于 animations on infinite loop

问题 I have 5 different animations that animate then disappear one after another. Is there a way to put them on an infinite loop so animation #1 begins and ends, then anim #2 begins and ends etc..? the whole process then would repeat on an infinite loop. I have the animations in separate blocks on delays. I'm guessing that there is a better way of doing this. this is what I have at the moment: -(void) firstAnimation { [UIView beginAnimations:@"Fade Out Image" context:nil]; [UIView