loops

问题 This question already has answers here : How to handle infinite loop caused by invalid input (InputMismatchException) using Scanner (5 answers) How to use Scanner to accept only valid int as input (6 answers) Closed 2 years ago . I am trying add catch blocks to my program to handle input mismatch exceptions. I set up my first one to work inside of a do while loop, to give the user the opportunity to correct the issue. System.out.print("Enter Customer ID: "); int custID=0; do { try { custID =

问题 Versions of this question have already been asked but I have not found a satisfactory answer. Problem : given a large numpy vector, find indices of the vector elements which are duplicated (a variation of that could be comparison with tolerance). So the problem is ~O(N^2) and memory bound (at least from the current algorithm point of view). I wonder why whatever I tried Python is 100x or more slower than an equivalent C code. import numpy as np N = 10000 vect = np.arange(float(N)) vect[N/2] =

问题 I have the R script below which takes more than 24 hours to but finally runs on Windows 10 with 10 gigabytes of RAM and an Intel Core M7 processor. The script does the following: A. I have generated a 50-time series dataset. B. I slice the same time series data set into chunks of the following sizes: 2,3,...,48,49 making me have 48 different time series formed from step 1 above. C. I divided each 48-time series data set into train and test sets so I can use rmse() function in Metrics package

问题 I have the R script below which takes more than 24 hours to but finally runs on Windows 10 with 10 gigabytes of RAM and an Intel Core M7 processor. The script does the following: A. I have generated a 50-time series dataset. B. I slice the same time series data set into chunks of the following sizes: 2,3,...,48,49 making me have 48 different time series formed from step 1 above. C. I divided each 48-time series data set into train and test sets so I can use rmse() function in Metrics package

问题 I have the R script below which takes more than 24 hours to but finally runs on Windows 10 with 10 gigabytes of RAM and an Intel Core M7 processor. The script does the following: A. I have generated a 50-time series dataset. B. I slice the same time series data set into chunks of the following sizes: 2,3,...,48,49 making me have 48 different time series formed from step 1 above. C. I divided each 48-time series data set into train and test sets so I can use rmse() function in Metrics package

问题 Is there a way to loop over multiple lists in parallel in a makefile or CMake file? I would like to do something like the following in CMake, except AFAICT this syntax isn't supported: set(a_values a0 a1 a2) set(b_values b0 b1 b2) foreach(a in a_values b in b_values) do_something_with(a b) endforeach(a b) This would execute: do_something_with(a0 b0) do_something_with(a1 b1) do_something_with(a2 b2) I would accept an answer in either CMake or Make, though CMake would be preferred. Thanks! 回答1:

问题 When running this code; varCheck=True Do While varCheck Pass=InputBox("Enter Password") Do If IsEmpty(pass) Then WScript.quit Exit Do End If If Pass = "123" Then varCheck=False Exit Do Else varCheck=True MsgBox("Wrong Password...Try Again") End If Loop Loop If the password is wrong then it doesn't restart to the top of the code, it just endlessly loops the "Wrong Password...Try Again" message box. How do I make it ask the password again? (p.s. I'm a newbie at coding so please explain yourself

问题 I have a hard time upgrading from Python 2.7 to Python 3. Many many errors. The code below that worked perfectly in Python 2.7 now gives me an error: gtk_list_store_get_value: assertion 'iter_is_valid (iter, list_store)' failed Traceback (most recent call last): File "/home/gato/bin/ave.py", line 1586, in writing result = self.grepa(str(entry_text.encode('iso-8859-1'))) File "/home/gato/bin/ave.py", line 1453, in grepa iterr = self.grep3(self.iniiterlist, regex) File "/home/gato/bin/ave.py",

问题 Hi im trying to code the following coefiicient matrix A in a for loop in Matlab. N is the total number of elements. And i and j are obtained from k . Could someone help me please code the A matrix correctly for any N value. The A and b are shown for k = 1:N A(k,k) = 4; % the diagonal element, corresponding to Tij, is always 4 % In the following, we look at the four neighbours of (i,j) that are % involved in the 5-point formula i = mod(k-1,nx)+1; j = (k-i)/nx+1; %get (i,j) from k %boundary

问题 I have an Excel having few sheets as below given in attachment as well: sheet 1 contains : SOURCE-KEY PAYER-NAME PAYER-CODE-TYPE PAYER-CODE 1 INDUSTRY PAY 123485 2 LEADING PAY 123422 Sheet 2 contains : SOURCE-KEY RECIEVER-KEY RECIEVER-KEY-TYPE RECIEVER-NAME RECIEVER-CODE 1 1 PERSON CEO A222222221 1 2 PERSON CO-FOUNDER A222222221 2 3 PERSON CFO A222222221 Now I want to generate one to many algorithm between two sheets that means for every value of SOURCE_KEY print all values in RECEIVER SHEET