arrays

问题 It's been a while since I last visited arrays (I've been working with vectors recently) and I need to convert an 2D vector back into a 2D array because of a library I am using accepts the paramaters of type double array where the accessors of this array is foo[i][j] for example. Here is my code: double** setupHMM(vector<vector<double> > &vals, int N, int M) { double** temp; temp = new double[N][M]; for(unsigned i=0; (i < N); i++) { for(unsigned j=0; (j < M); j++) { temp[i][j] = vals[i][j]; }

问题 It's been a while since I last visited arrays (I've been working with vectors recently) and I need to convert an 2D vector back into a 2D array because of a library I am using accepts the paramaters of type double array where the accessors of this array is foo[i][j] for example. Here is my code: double** setupHMM(vector<vector<double> > &vals, int N, int M) { double** temp; temp = new double[N][M]; for(unsigned i=0; (i < N); i++) { for(unsigned j=0; (j < M); j++) { temp[i][j] = vals[i][j]; }

问题 I'm trying to sort an array that sometimes has Infinity or NaN . When I use a standard JavaScript array.sort() it seems to sort until it reaches a NaN and then I get random results after that. var array =[.02,.2,-.2,Nan,Infinity,20]; Is there a way to still sort this so that the end result is from negative to positive and still have NaN or Infinity at the end. -.2,.02,.2,20,NaN,Infinity 回答1: You can catch NaN and Infinity using JavaScript's built-in utility functions for those cases: let

问题 I'm trying to sort an array that sometimes has Infinity or NaN . When I use a standard JavaScript array.sort() it seems to sort until it reaches a NaN and then I get random results after that. var array =[.02,.2,-.2,Nan,Infinity,20]; Is there a way to still sort this so that the end result is from negative to positive and still have NaN or Infinity at the end. -.2,.02,.2,20,NaN,Infinity 回答1: You can catch NaN and Infinity using JavaScript's built-in utility functions for those cases: let

问题 Let say i have the following: import numpy as np data = np.array([ [1,2,3], [1,2,3], [1,2,3], [4,5,6], ]) How would I go about changing values in column 3 based on values in column 2? For instance, If column 3 == 3, column 2 = 9. [[1,9,3], [1,9,3], [1,9,3], [4,5,6]] I've looked at np.any() , but I can't figure out how to alter the array in place. 回答1: You can use Numpy's slicing and indexing to achieve this. Take all the rows where the third column is 3 , and change the second column of each

问题 Let say i have the following: import numpy as np data = np.array([ [1,2,3], [1,2,3], [1,2,3], [4,5,6], ]) How would I go about changing values in column 3 based on values in column 2? For instance, If column 3 == 3, column 2 = 9. [[1,9,3], [1,9,3], [1,9,3], [4,5,6]] I've looked at np.any() , but I can't figure out how to alter the array in place. 回答1: You can use Numpy's slicing and indexing to achieve this. Take all the rows where the third column is 3 , and change the second column of each

问题 Let say i have the following: import numpy as np data = np.array([ [1,2,3], [1,2,3], [1,2,3], [4,5,6], ]) How would I go about changing values in column 3 based on values in column 2? For instance, If column 3 == 3, column 2 = 9. [[1,9,3], [1,9,3], [1,9,3], [4,5,6]] I've looked at np.any() , but I can't figure out how to alter the array in place. 回答1: You can use Numpy's slicing and indexing to achieve this. Take all the rows where the third column is 3 , and change the second column of each

问题 I am new to Javascript, I have an array which contains numbers. var arr = [2,4,8,1,5,9,3,7,6]; How can i sort it using native For Loop in javascript. I know sort function is available but i want it through for loop. output should be- var res = [1,2,3,4,5,6,7,8,9]; 回答1: I would do something like that... var input = [2,3,8,1,4,5,9,7,6]; var output = []; var inserted; for (var i = 0, ii = input.length ; i < ii ; i++){ inserted = false; for (var j = 0, jj = output.length ; j < jj ; j++){ if

问题 I am new to Javascript, I have an array which contains numbers. var arr = [2,4,8,1,5,9,3,7,6]; How can i sort it using native For Loop in javascript. I know sort function is available but i want it through for loop. output should be- var res = [1,2,3,4,5,6,7,8,9]; 回答1: I would do something like that... var input = [2,3,8,1,4,5,9,7,6]; var output = []; var inserted; for (var i = 0, ii = input.length ; i < ii ; i++){ inserted = false; for (var j = 0, jj = output.length ; j < jj ; j++){ if

问题 I have implemented a recognizer intent like this. Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Tell me stuff"); startActivityForResult(intent, REQUEST_CODE); With a return like this if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) { ArrayList<String> matches = data.getStringArrayListExtra( RecognizerIntent.EXTRA