loops

问题 How can I loop that time() function on the onCreate every 5 seconds.. help me I'm a newbie in Android =) ... I want to execute time() function in onCreate every 5 seconds. public void onCreate(Bundle savedInstanceState) { time(); //<-- How can i execute this every 5 seconds. } private void time() { new Handler().postDelayed(new Runnable() { @Override public void run() { int success; gps = new GPSTracker(AdminMenu.this); if(gps.canGetLocation()){ tmplat=latitude; tmplong=longitude; // new

问题 This question already has answers here : Making a Hash Pyramid (2 answers) Closed 3 years ago . I'm going through the Harvard CS50 online course and one of the problems is to create a "mario style pyramid" using spaces and hashes. I've got the spaces solved but the hashes are giving me trouble. Here's the code: #include <stdio.h> #include <cs50.h> int main(void) { //get height between 1 and 23 int height; do { printf("Please enter a height: "); height = GetInt(); } while (height < 1 || height

问题 int x=0; string fullname = ""; float salary; float payincrease; float newsal; float monthlysal; float retroactive; while(x<3){ cout << "\n What is your full name?"; cin >> fullname; cout << "\n What is your current salary? \t"; cin >> salary; cout << "\n What is your pay increase? \t"; cin >> payincrease; newsal = (salary*payincrease)+salary; monthlysal = newsal/12.00; retroactive = (monthlysal*6)-(salary/2); cout << "\n" << fullname << "'s SALARY INFORMATION"; cout << "\n New Salary \t

问题 In C, I would do this: int i; for (i = 0;; i++) if (thereIsAReasonToBreak(i)) break; How can I achieve something similar in Python? 回答1: Using itertools.count: import itertools for i in itertools.count(): if there_is_a_reason_to_break(i): break In Python2 xrange() is limited to sys.maxint, which may be enough for most practical purposes: import sys for i in xrange(sys.maxint): if there_is_a_reason_to_break(i): break In Python3, range() can go much higher, though not to infinity: import sys

问题 /******************************************************************************************************* I am currently building an autonomous vehicle. What it does is as follows it draws GPS information and Magnetometer Sensor data. Then when all sensor data is collected, Arduino decides which way to turn. This is done by calculating a heading error. *******************************************************************************************************/ /*************************************

问题 I have an php array is below, $two_dimention = array( array("id"=>4, "name" => "Home", "parent" => 0, "depth" => 0), array("id"=>5, "name" => "Menu 1", "parent" => 0, "depth" => 0), array("id"=>6, "name" => "Menu 2", "parent" => 0, "depth" => 0), array("id"=>8, "name" => "Menu 2.1", "parent" => 6, "depth" => 1), array("id"=>10, "name" => "Menu 2.1.1", "parent" => 8, "depth" => 2), array("id"=>11, "name" => "Menu 2.1.2", "parent" => 8, "depth" => 2), array("id"=>9, "name" => "Menu 2.2",

问题 new at this, please tell me if I'm leaving information out or anything like that. The code I'm working on can be seen here: http://codepen.io/hutchisonk/pen/mVyBde and I have also pasted the relevant section of javascript below. I'm having trouble understanding why this code is behaving as it is. Quick outline - I have defined a few variables at the top, made a function that fetches the data I need and builds it into a pretty little list. This seems to be working as planned. With the function

问题 new at this, please tell me if I'm leaving information out or anything like that. The code I'm working on can be seen here: http://codepen.io/hutchisonk/pen/mVyBde and I have also pasted the relevant section of javascript below. I'm having trouble understanding why this code is behaving as it is. Quick outline - I have defined a few variables at the top, made a function that fetches the data I need and builds it into a pretty little list. This seems to be working as planned. With the function

问题 I have read a lot of data.frame rbind related questions, but none of them helped my situation. I have made a script to recursively scan folders, extract pixel values from each image in the folder based on the shapefiles, with the help of a for loop. In the picture attached you can see the data.frame which is a result of this extraction from one folder. pixel extraction dataframe All the other folders have the same number of images which are very similarly named, so the number of columns in

问题 I need to wrap every 4 .product divs in a row within a <li> tag so that when there's: <ul> <div class="product">...</div> <div class="product">...</div> <div class="product">...</div> <div class="product">...</div> <div class="product">...</div> <div class="product">...</div> </ul> it gets turned in to a: <ul> <li> <div class="product">...</div> <div class="product">...</div> <div class="product">...</div> <div class="product">...</div> </li> <li> <div class="product">...</div> <div class=