假设您要使用MATLAB中定义的一系列函数，并且您只需将这些函数的名称作为字符串变量。假设您已经创建了 mysqli_query($con,$sql) or die((mysql_error());
，fun1，...，fun2，并且您还有一个字符串向量funN。如何自动调用每个函数而不必逐个写入每个函数的名称？
答案 0 :(得分：6)
使用//get the buttons and add an event listner for click on the calculate button
var buttons = document.getElementsByTagName("button");
var calculateButton = buttons[2];
//get the total element to add to later
var total = document.querySelector('.total > span');
//items to iterate over
var itemRows = document.querySelectorAll('.item-row');
calculateButton.addEventListener('click', updatePriceByProduct);
function calculateTotals(itemRow) {
//get the item's price and quantity
var price = itemRow.children[1].innerHTML;
var quantity = itemRow.children[2].children[0].value;
var total = price * quantity;
//set item's total to its total
itemRow.children[3].innerHTML = total;
return total;
}
function calculateTotal(totals) {
var newTotal = totals.reduce(function(a,b) {return a + b});
console.log(newTotal, 'new total');
total.innerHTML = newTotal;
}
function updatePriceByProduct(event){
event.preventDefault();
//return an array with the totals from each item-row
var prices = Array.prototype.map.call(itemRows, calculateTotals);
//calcualte the total from the array of prices
calculateTotal(prices);
}
。当然，如果函数已被定义为函数句柄（例如str2func），则可以跳过下面的str2func步骤。
fun1 = @(x)x+x.^2+sqrt(x))