if-statement

问题 I need to URLs with three specific specific substrings out of a loop. The following code worked, but I am sure there's a more elegant way to do it: for node in soup.findAll('loc'): url = node.text.encode("utf-8") if "/store/" not in url and "/cell-phones/" not in url and "/accessories/" not in url: objlist.loc.append(url) else: continue Thank you! 回答1: url = node.text.encode("utf-8") sub_strings = ['/store','/cell-phones/','accessories'] if not any(x in url for x in sub_strings): objlist.loc

问题 SimpleHtmldom can be used to extract the contents of the first element with class description . $html = str_get_html($html); $html->find('.description', 0) However if this class does not exist, PHP will throw an error Trying to get property of non-object I tried if(!isset($html->find('.description', 0))) { echo 'not set'; } and if(!empty($html->find('.description', 0))) { echo 'not set'; } but both gives the error Can't use method return value in write context What is the proper way to check

问题 What would be the best way to see (in a 2 player) game of Tic Tac Toe who won? Right now I'm using something similar to the following: if (btnOne.Text == "X" && btnTwo.Text == "X" && btnThree.Text == "X") { MessageBox.Show("X has won!", "X won!"); return; } else // I'm not going to write the rest but it's really just a bunch // if statements. So how do I get rid of the multiple if's? 回答1: Something alongs: rowSum == 3 || columnSum == 3 || diagnolSum == 3 .. ? 回答2: If you store your buttons in

问题 I have a php code as shown below in which I want to display anything in between two calendar days of the week. The values coming inside $data->{"select_start_day"}; $data->{"start_time"}; $data->{"select_end_day"}; and $data->{"end_time"}; is controlled by the user. PHP Code: if (file_exists('feeds/ptp-ess_landing.json')) { $data = json_decode(file_get_contents('feeds/ptp-ess_landing.json')); } date_default_timezone_set('America/Toronto'); $arradate = strtolower(date('D')); $nowtime = (int

问题 The end of a long string of dplyr pipes is mutate(n = if_else(FiscalYear == "FY2018" & Candy == "SNICKERS", n - 3, n)) which gives this error Error in mutate_impl(.data, dots) : Evaluation error: `false` must be type double, not integer. Which goes away if I do either of these two instead mutate(n = ifelse(FiscalYear == "FY2018" & Candy == "SNICKERS", n - 3, n)) mutate(n = if_else(FiscalYear == "FY2018" & Candy == "SNICKERS", n - 3L, n)) I thought it'd be easiest to make a simple reproducible

问题 I have a list of 75200 words. I need to give a 'unique' id to each word, and the length of each id could be 3 letters or less. I can use numbers, letters or even symbols but the max length is 3. Below is my code. import java.io.*; import java.util.*; public class HashCreator { private Map completedWordMap; private String [] simpleLetters = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}; private String[] symbols = {"!","@","#","$","%",

问题 I have a list of 75200 words. I need to give a 'unique' id to each word, and the length of each id could be 3 letters or less. I can use numbers, letters or even symbols but the max length is 3. Below is my code. import java.io.*; import java.util.*; public class HashCreator { private Map completedWordMap; private String [] simpleLetters = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}; private String[] symbols = {"!","@","#","$","%",

问题 I am unsure if all of the code will be necessary or not so i will post it: # Tic-Tac-Toe # Plays the game of tic-tac-toe against a human opponent # global constants X = "X" O = "O" EMPTY = " " TIE = "TIE" NUM_SQUARES = 9 def display_instruct(): """Display game instructions.""" print( """ Welcome to the greatest intellectual challenge of all time: Tic-Tac-Toe. This will be a showdown between your human brain and my silicon processor. You will make your move known by entering a number, 0 - 8.

问题 I have a large dataset of samples with descriptors of whether the sample is viable - it looks (kind of) like this, where 'desc' is the description column and 'blank' indicates the sample is not viable: desc x y z 1 blank 4.529976 5.297952 5.581013 2 blank 5.906855 4.557389 4.901660 3 sample 4.322014 4.798248 4.995959 4 sample 3.997565 5.975604 7.160871 5 blank 4.898922 7.666193 5.551385 6 blank 5.667884 5.195825 5.232072 7 blank 5.524773 6.726074 4.767475 8 sample 4.382937 5.926217 5.203737 9

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Check variable equality against a list of values Javascript if statement with multiple permissible conditions I must click the same 21 of 253 items (li) in a dropdown list (ul). Scrolling I'll have to do this for the same list on 500+ pages, I figured I could Javascript inject each ul, loop through and click each li which happens to be one of the 21. It seems I cannot do something like if(item[i] === ('aasdf'|