How can I check the version of my script against an online file to see if it's the latest version? For clarification, I'm talking about a script I wrote, not the version of PHP. I'd like to incorporate a way for the end user to tell when I've updated the script. ...
I am trying to decide if a string is a number in Ruby. This is my code whatAmI = "32.3a22" puts "This is always false " + String(whatAmI.is_a?(Fixnum)); isNum = false; begin Float(whatAmI) isNum = true; rescue Exception => e puts "What does Ruby say? " + e isNum = false; end puts isNum I realize that I can do it with a RegEx, ...
I have written a script in python that uses cookies and POST/GET. I also included proxy support in my script. However, when one enters a dead proxy proxy, the script crashes. Is there any way to check if a proxy is dead/alive before running the rest of my script? Furthermore, I noticed that some proxies don't handle cookies/POST headers...
I see a lot of 'related' questions showing up, but none I looked at answer this specific scenario. During a while/for loop that parses a result set generated from a SQL select statement, what is the best way to prevent the next line from being outputted if the line before it contains the same field data (whether it be the 1st field or t...
Many C/C++/Fortran and other programmers would have come across "stack overflow" errors. My question is, Is there a tool, a program or a simple code snippet, that allow us to monitor or check the size of the stack while the program is running? This may be helpful to pinpoint where the stack is being accumulated and eventually causing ove...
Hi This is My last question. Now my new requirement is to ping some set of servers and check if they are replying or not. I am trying my way of system("ping xxx.xx.xx.xx >out.txt"); And then parsing the out.txt for a string "Request timed out.". This is yielding me good results. But is there any better way to do from c program. Non p...
Hi, In my iPhone application I have used (UITableViewCellAccessoryCheckmark) to add the checkmarks in the cells, - it is added to the cell at the right side of the cell. I want the checkmarks to display in the middle of the cell and after that a string should display. So that the user can set the cell item as checked or unchecked. Ple...
Hi So, I want to understand more about binary searching, cause I don't really understand. Binary search requires a precondition that an array is sorted. I got that right? It seems like a method should check this precondition and throw an exception if it is not met. But, why is checking the precondition a bad idea? ...
Greetings, I am seeking help on building a script that will allow my msi installer to check for an exsisting db or exsisting user on the local server of sql server 2000 Personal Edition, during the pre install, the script needs to return the sql response and not run/resintall the sql scripts if the db name or db user is on the server al...
I find myself writing the same argument checking code all the time for number-crunching: def myfun(a, b): if a < 0: raise ValueError('a cannot be < 0 (was a=%s)' % a) # more if.. raise exception stuff here ... return a + b Is there a better way? I was told not to use 'assert' for these things (though I don't see th...
I'm working on a small iphone project and i would need to check if the userName entered only contains alphanumerical characters? (A-Z, a-z, 0-9). How would i go about checking it? ...
Sample data: Hello I'm 301 I need a regex to allow A-Z a-z 0-9 and space(s) only. All other characters are not allowed. If detected, return false to javascript. Based on the sample data above, it should return false because got a character which is not accetable===> ' How to write this in js. ...
What is a good way for a Haskell function to check a number of different conditions and return an error message on a failure? In Python or similar language, it would be straightforward: if failure_1: return "test1 failed" if failure_2: return "test2 failed" ... if failure_n: return "testn failed" do_computation How do you...
I'm having an issue with a program I'm working on in C++. I am asking the user to input a valid number. I take it in as a string because the particular assignment I'm doing, it makes it easier in the long run. For basic error checking, I want to check to see if the number entered is a valid number. Example: Enter number: 3.14 This would...
what is the procedure to know that when Everytime the user starts the application it will check if an instance is already running. If its not running it will launch it otherwise it will focus to the current one.i have already tried the code for singleton application but its giving lots of errors. its not running properly. can u provide m...
#include<stdio.h> void function(int); int main() { int x; printf("Enter x:"); scanf("%d", &x); function(x); return 0; } void function(int x) { float fx; fx=10/x; if(10 is divided by zero)// I dont know what to put here please help printf("division by zero is not allowed"); else printf...
Hi, is there a way to know if a variable passed into a function is a native object? I mean, i have a function that requires only native objects as arguments, for every other type of variable it throws an error. So: func(Array); //works func(String); //works func(Date); //works func(Object); //works ... func([]); //Throwr error func({});...
i am using gwt. i need to check some input data. all checking functions are located in PHP server check.php i am not using javascript checking executed from locally. all i am doing is to send user input to server by ajax and validate in that place and error message comes from server to client's gwt widget. is it best approach?? i c...
i'm setting up a custom class that accepts some Number parameters, but i need to limit those parameters and would like to know the best way of doing so. currently, i'm simply calling if statements, and throwing an error if the number is above or below what's accepted. for example, there is a parameter that accepts and angle, but only b...