for-loop

问题 I have the below code. I have a form setup that has 10 input fields set up, 5 for column1 and 5 for column2. try { $count = count($_POST['column1']); $sql = 'INSERT INTO tablename (column1, column2) VALUES '; for ($i=0; $i< $count; $i++) { $sql2 = '(' .$_POST['column1'][$i] . ', ' . $_POST['column2'][$i] . ')'; if ($i <$count - 1) { $sql2 .= ','; } echo "$sql2 'indside'<br>"; } echo "$sql2 'outside'<br>"; $sql3 = "$sql $sql2"; $pdo->exec($sql3); } catch (PDOException $e) { $output = 'Error: '

问题 In this code, I am putting the values of MySQL database into String array(list[count]) and count=number of rows in table in database. And while I am applying for-loop to print these values in the drop-down list in javascript, using j variable, compiler is not able to recognize the j . I am not able to understand why. Please help me. <%@page import="java.sql.DriverManager"%> <%@page import="com.mysql.jdbc.Driver"%> <%@page import="java.sql.Connection"%> <%@page import="java.sql

问题 In this code, I am putting the values of MySQL database into String array(list[count]) and count=number of rows in table in database. And while I am applying for-loop to print these values in the drop-down list in javascript, using j variable, compiler is not able to recognize the j . I am not able to understand why. Please help me. <%@page import="java.sql.DriverManager"%> <%@page import="com.mysql.jdbc.Driver"%> <%@page import="java.sql.Connection"%> <%@page import="java.sql

问题 How do I get the below for loop statement to go through my array more than once? var clients = new Array("client1", "client2", "client3", "client4", "client5"); var indexCounter; var holmesminutes = 0; for (indexCounter = 0; indexCounter < clients.length; indexCounter++) { holmesminutes = holmesminutes + 15; document.write(clients[indexCounter] + " testroom " + holmesminutes +"<br>"); } 回答1: Put another loop around the loop. for (var repeatCounter = 0; repeatCounter < 5; repeatCounter++) {

问题 How do I get the below for loop statement to go through my array more than once? var clients = new Array("client1", "client2", "client3", "client4", "client5"); var indexCounter; var holmesminutes = 0; for (indexCounter = 0; indexCounter < clients.length; indexCounter++) { holmesminutes = holmesminutes + 15; document.write(clients[indexCounter] + " testroom " + holmesminutes +"<br>"); } 回答1: Put another loop around the loop. for (var repeatCounter = 0; repeatCounter < 5; repeatCounter++) {

问题 Ive been trying to combine two items together on each loop, in the result there is a null, how do i check the "items" so not to get null's? var oTitle = [], items = ['a1', 'a2', 'b1', 'b2', 'c1', 'c2']; for (var i=0; i < items.length; i++) { oTitle[i] = { one: '' + items[i], // items[i].value two: '' + items[++i] }; } console.log(JSON.stringify(oTitle)); // [{"one":"a1","two":"a2"},null,{"one":"b1","two":"b2"},null,{"one":"c1","two":"c2"}] 回答1: Because you change the i in the for loop's body.

问题 This is a follow up of Pushing an object into array where I was pushing an object into the array by identifying the parentActivityId. Now I wanted to remove the object based on its id.I have tried the below code based on the follow up question but its not working.Can anyone tell me what I'm doing wrong here? function getParent(r, a) { return a.id === child.parentActivityId ? a : a.items.reduce(getParent, r); } var node = data.reduce(getParent, {}); 'items' in node && node.items.splice(child,1

问题 This is a follow up of Pushing an object into array where I was pushing an object into the array by identifying the parentActivityId. Now I wanted to remove the object based on its id.I have tried the below code based on the follow up question but its not working.Can anyone tell me what I'm doing wrong here? function getParent(r, a) { return a.id === child.parentActivityId ? a : a.items.reduce(getParent, r); } var node = data.reduce(getParent, {}); 'items' in node && node.items.splice(child,1

问题 I am trying to make the following loop parallel-friendly in MATLAB so that I can use parfor : for ivert = 1 : nVerts b = obj.f( obj.neighIDs{ ivert } ); x = obj.coeffMatrix{ ivert } \ b; obj.solution( ivert, : ) = x( 1 : 3 ); end I tried to slice the variables according to MATLAB documentation posted here: parfor ivert = 1 : nVerts i = obj.neighIDs{ ivert }; b = obj.f( i ); A = obj.coeffMatrix{ ivert } x = A \ b; obj.solution( ivert, : ) = x( 1 : 3 ); end But MATLAB complains that: Valid

问题 somewhat of a python/programming newbie here, I have come up with a code of 2 nested for loops to test if the elements of the the 2nd loop are a partial (or complete) match of the elements in the first list, and if so those elements are removed from the 1st list. Here is the code: >>> lst = ["my name is Bob Jenkins", "Tommy Cooper I am", "I be Bazil", "I Tarzan"] >>> names = ["Bob", "Tarzan"] >>> for l in lst: for n in names: if n in l: lst.remove(l) >>> print lst ['Tommy Cooper I am', 'I be