arrays

问题 This question already has answers here : Curly Brackets in Arrow Functions (2 answers) Closed 9 months ago . I have a .map() function that changes isActive property value of objects in data array. However wraps it with curly braces returns me undefined whereas wrapping it with parenthesis or no wrap returns the updated value. Curly braces are used as a wrapper in an arrow function but does it work differently for .map()? const newData = data.map((data) => { data.label === label ? { ...data,

问题 The project prompt looks like this: In Netbeans create a project named Project1, be sure to create a package, DO NOT use the default package. There will be two java files, the first most likely named Project1.java (which contains main) and the second named Record.java which contains a variable containing ONE LINE OF DATA (or record) read from the file. In your main class (not in Record.java) create an array of Record objects. When the program starts have main() call a method that reads each

问题 The project prompt looks like this: In Netbeans create a project named Project1, be sure to create a package, DO NOT use the default package. There will be two java files, the first most likely named Project1.java (which contains main) and the second named Record.java which contains a variable containing ONE LINE OF DATA (or record) read from the file. In your main class (not in Record.java) create an array of Record objects. When the program starts have main() call a method that reads each

问题 I'm getting the error: expected primary-expression before ']' token` On this line: berakna_histogram_abs(histogram[], textRad); Anybody know why? const int ANTAL_BOKSTAVER = 26; //A-Z void berakna_histogram_abs(int histogram[], int antal); int main() { string textRad = ""; int histogram[ANTAL_BOKSTAVER]; getline(cin, textRad); berakna_histogram_abs(histogram[], textRad); return 0; } void berakna_histogram_abs(int tal[], string textRad){ int antal = textRad.length(); for(int i = 0; i < antal;

问题 am trying to get output of following array in one format. its not getting <?php $distance_covered = array( '1_JAN_2017' => array('DRIVER_1' => array(2, 5, 3),'DRIVER_2' => array(3, 2, 6, 9)), '2_JAN_2017' => array('DRIVER_1' => array(3, 9), 'DRIVER_3' => array(1, 4, 8)), '3_JAN_2017' => array('DRIVER_4' => array(9), 'DRIVER_1' => array(2, 7, 5, 2)), '4_JAN_2017' => array('DRIVER_1' => array(5, 3, 3, 2), 'DRIVER_4' => array(4, 9, 8, 5)), '5_JAN_2017' => array('DRIVER_2' => array(8, 5), 'DRIVER

问题 title_list = [['determined', 'by', 'saturation', 'transfer', '31P', 'NMR'], ['Interactions', 'of', 'the', 'F1', 'ATPase', 'subunits', 'from', 'Escherichia', 'coli', 'detected', 'by', 'the', 'yeast', 'two', 'hybrid', 'system']] pc_title_list = [[]] print(title_list[1][0].isalpha() == True) for i in range(len(title_list)): for j in range(len(title_list[i])): if (title_list[i][j].isalpha() == True): pc_title_list[i].append(title_list[i][j].lower()) And now i going to stucking in this (IndexError

问题 This question already has answers here : Defer execution for ES6 Template Literals (8 answers) Closed 10 months ago . I’m trying to store a lot of text in an array (so I can easily pull it out using a value). The issue is within the strings I’d like to use template literals so the string changes depending on input (e.g. once they’ve added their name, it uses their name. I can get this working no problem if I include the string in the function. For example: textbox.textContent = `what does $

问题 This question already has answers here : Defer execution for ES6 Template Literals (8 answers) Closed 10 months ago . I’m trying to store a lot of text in an array (so I can easily pull it out using a value). The issue is within the strings I’d like to use template literals so the string changes depending on input (e.g. once they’ve added their name, it uses their name. I can get this working no problem if I include the string in the function. For example: textbox.textContent = `what does $

问题 I keep getting an unhandled exception in my code and it has me stumped. I am sure it is in the way I have my variables declared. Basically I am attempting to create 3 arrays, M rows, N columns of random variables. If I set my N = 1,000 and M = 10,000, not a problem. If I then change M = 100,000 I get an Unhandled exception memory allocation error. Can someone please help me understand why this is happening. Parts of the code was written on VS2010. I have now moved on to VS2013, so any

问题 I keep getting an unhandled exception in my code and it has me stumped. I am sure it is in the way I have my variables declared. Basically I am attempting to create 3 arrays, M rows, N columns of random variables. If I set my N = 1,000 and M = 10,000, not a problem. If I then change M = 100,000 I get an Unhandled exception memory allocation error. Can someone please help me understand why this is happening. Parts of the code was written on VS2010. I have now moved on to VS2013, so any