if-statement

问题 Can somebody help understand this code? protected void Page_Load(object sender, EventArgs e) { Database database = new Database(); OleDbConnection conn = database.connectDatabase(); if (Request.Cookies["BesteldeArtikelen"] == null) { lbl_leeg.Text = "Er zijn nog geen bestelde artikelen"; } else { HttpCookie best = Request.Cookies["BesteldeArtikelen"]; int aantal_bestel = best.Values.AllKeys.Length; int[] bestelde = new int[aantal_bestel]; int index = 0; foreach (string art_id in best.Values

问题 I have an array with a particular size (100 for example), which is filled with user input. However, the user might not necessarily enter enough data to fill the entire array. I want to count the elements of the array which the user entered. How can I do this? I tried by this for loop: int COUNT=0; for( int i=0; i<size; i++) if (Student[i]=1) //which means this element is true, not empty element. COUNT++; cout<< COUNT+1 << "\n"; But this code gives an error on this line: if (Students[i]==1)

问题 I have a problem with a dynamic list in Excel 2003 where some cells that I want to be empty are returning #NUM! . I have tried manipulating the following code, but to no avail: =IF(ISERROR(INDEX(venue_name, SMALL(IF(($A$10=date_ns)*(COUNTIF($A$13:A29,venue_name)=0), ROW(date_ns)-MIN(ROW(date_ns))+1, ""), 1))) I know its something to do with syntax/parentheses but have exhausted myself trying different combinations. Without the IF(ISERROR( and the closing bracket, the code runs absolutely fine

问题 I'm trying to grade students by giving them A or B depending on their score. If someone is having absent instead of a score, I return a value of the cell. However, it does not return the value of the cell. The reference records are in a separate sheet called raw . I think it may be because I'm trying to return a string data. I am using Excel 2007. Here's the formula: =IF(raw!E6>=75,"AA",IF(raw!E6>=70,"AB",IF(raw!E6>=60,"B",IF(raw!E6>=50,"C",IF(raw!E6>=40,"D",IF(raw!E6<40,"RT",raw!E6)))))) 回答1

问题 I've div Vue with more than one different if condition, there is way to add more than one v-if in one <div> , Something like that <div v-if="any" v-if="another-any"> </div> I saw this but working as a and condition, not another condition <div v-if="any && another-any"> </div> And also I saw OR condition <div v-if="any || another-any"> </div> But there are 2 or more different conditions in one div? 回答1: If your condition is too long to put it inside a v-if , just create a computed property:

问题 I've div Vue with more than one different if condition, there is way to add more than one v-if in one <div> , Something like that <div v-if="any" v-if="another-any"> </div> I saw this but working as a and condition, not another condition <div v-if="any && another-any"> </div> And also I saw OR condition <div v-if="any || another-any"> </div> But there are 2 or more different conditions in one div? 回答1: If your condition is too long to put it inside a v-if , just create a computed property:

问题 This is the code ` region<-"ARLINGTON" data<-read.csv("city_markets.csv") for(i in 1:length(data[[1]])){ if(grep(region,as.character(data[[3]][i]),ignore.case=TRUE)==1){ for(j in 1:length(data)){ write(data[[j]][i],"analyzed.txt",append=TRUE) } } } ` now what i'm trying to do here is I'm accessing the csv's column(3rd one) and comparing it with the region specified! i keep getting the error Error in if (grep(region, as.character(data[[3]][i]), ignore.case = TRUE) == : argument is of length

问题 I have a database that holds several bits of info per entry. I use a while statement to loop through each one and display what I call "plots" which will be a number, each entry can hold multiple plots EG 111, 222, 333 what I need to do I have the while statement (or another method that may suit better) to check whether that plot numbers that each entry holds are contained within a array that I set and then display so information EG: while ($row = mysqli_fetch_array($aa, MYSQLI_ASSOC)) {

问题 What I have are a list of contracts below a header row. Some contracts take up multiple rows. What I would like is to have a VBA Macro that will compare cell A3 to A2. If they are the same; next. If they are different, then select the cells A3:F3 and change Interior.Color to grey. Then compare A4 to A3, then A5 to A4 and repeat for all used cells in the A column, effectively making a table. This is what the screen looks like: Row Column A Column B C D E F 1. 000000 (Info) (Info) (Info) (Info)

问题 I'm making a Rock-Paper-Scissors-Lizard-Spock (Big Bang Theory, the tv show) using ReactJS and i'm facing some kind of abstract issue. switch (this.state.playerOnePick === 'Rock') { case((this.state.playerTwoPick === 'Scissors') || (this.state.playerTwoPick === 'Lizard')): return ( <div> <h1>Player One wins !</h1> <h2>P1: {this.state.playerOnePick} P2: {this.state.playerTwoPick}</h2> </div> ); break; case((this.state.playerTwoPick === 'Paper') || (this.state.playerTwoPick === 'Spock')):