function

问题 I have a recursive function that checks if a string is a palindrome, but my assignment asks me to count the number of palindromes in a string (for example kayak has 2). I'm really confused about how I can implement a recursive function that counts the number of palindromes. Here's my current code: function isPalindrome(string) { if (string.length <= 1) { return true; } let [ firstLetter ] = string; let lastLetter = string[string.length - 1]; if (firstLetter === lastLetter) { let

问题 Currently writing a function for a program and one component is to search whether a single variables are being used within a python file. FUNCTION: def SINGLE_CHAR_VAR(python_filename): file = open(python_filename) lines = [0] SINGLE_CHAR_VAR = [] for line in file: stripped = line.strip('\n\r') lines.append(stripped) from utils import vars_indents variable_list = (vars_indents(python_filename))[0] for i in range(1, len(variable_list)): if len(variable_list[i][0][0]) == 1: SINGLE_CHAR_VAR

问题 I can't seem to find the answer to this newbie question. If I have a class // Header file (.h) Class X { public: friend bool operator==(const X&, const X&); inline size_type rows() const; }; etc... when I go to implement the .cpp file of X, should I include the words inline & friend in the function names in the .cpp file. ie, should I implement my file similar to the below // CPP file (.cpp) #include "X.h" friend bool operator==(const X&, const X&) { //implementation goes here //return true

问题 Hi I am giving labels to my data frame manually like below, I have 800 columns to be labeled , after that I am creating a subset of data frame (sub setting of data have many), then applying that data frame to function for calculation. labels can be different for all chunks , also its very time taking for creating labels one by one for all chunks. data<-data.frame( col1=c(1,1,NA,NA,NA,NA,NA,NA,1,NA,NA,NA,NA,NA,NA,NA,NA,1,NA,NA,NA,1,1,1,NA,1,1,NA,NA,NA,NA,1,NA,NA,NA,NA,1,NA,1), col2=c(1,1,1,1,1

问题 Hi I am giving labels to my data frame manually like below, I have 800 columns to be labeled , after that I am creating a subset of data frame (sub setting of data have many), then applying that data frame to function for calculation. labels can be different for all chunks , also its very time taking for creating labels one by one for all chunks. data<-data.frame( col1=c(1,1,NA,NA,NA,NA,NA,NA,1,NA,NA,NA,NA,NA,NA,NA,NA,1,NA,NA,NA,1,1,1,NA,1,1,NA,NA,NA,NA,1,NA,NA,NA,NA,1,NA,1), col2=c(1,1,1,1,1

问题 Hi I am giving labels to my data frame manually like below, I have 800 columns to be labeled , after that I am creating a subset of data frame (sub setting of data have many), then applying that data frame to function for calculation. labels can be different for all chunks , also its very time taking for creating labels one by one for all chunks. data<-data.frame( col1=c(1,1,NA,NA,NA,NA,NA,NA,1,NA,NA,NA,NA,NA,NA,NA,NA,1,NA,NA,NA,1,1,1,NA,1,1,NA,NA,NA,NA,1,NA,NA,NA,NA,1,NA,1), col2=c(1,1,1,1,1

问题 I want to run a function when a HTML <input/> tag changes. How do I do this? There are some answers for this but they are all in jQuery and I want plain javascript. Can someone give me a simple example? Thanks! I want the input to be a type as text: <input type="text" id="change"> 回答1: You can use the input event. This will trigger not only on key up and paste, but also other text modification events such as drag & drop. change.addEventListener("input", function (e) { alert(this.value); });

问题 I want to run a function when a HTML <input/> tag changes. How do I do this? There are some answers for this but they are all in jQuery and I want plain javascript. Can someone give me a simple example? Thanks! I want the input to be a type as text: <input type="text" id="change"> 回答1: You can use the input event. This will trigger not only on key up and paste, but also other text modification events such as drag & drop. change.addEventListener("input", function (e) { alert(this.value); });

问题 How to pass a function in android using Kotlin . I can able to pass if i know the function like : fun a(b :() -> Unit){ } fun b(){ } I want to pass any function like -> fun passAnyFunc(fun : (?) ->Unit){} 回答1: Method as parameter Example: fun main(args: Array<String>) { // Here passing 2 value of first parameter but second parameter // We are not passing any value here , just body is here calculation("value of two number is : ", { a, b -> a * b} ); } // In the implementation we will received

问题 I want to set the first day of the week to Thursday (not Sunday or Monday), because it's the company's cut-off date. I already have a code to determine the current week number of a date but it starts in Sunday or Monday. How to modify these to my preference? function findweek($date) { $monthstart=date("N",strtotime(date("n/l/Y",strtotime($date)))); $newdate=(date("j",strtotime($date))+$monthstart)/7; $ddate=floor($newdate); if($ddate != $date) { $ddate++; } return $ddate; } 回答1: http://php