PHP has no operator overloading* so + with objects makes PHP trying it to convert them to string first, but DateInterval does not support that: interval 1: 03:05 interval 2: 05:00 Total interval : 08:05 Instead you need to create a new DateTime object, then use the add function to add the intervals and finally … Read more
Your code concatenates three strings, then converts the result to a number. You need to convert each variable to a number by calling parseFloat() around each one. total = parseFloat(myInt1) + parseFloat(myInt2) + parseFloat(myInt3);
new_list = [x+1 for x in my_list]
One or both of the variables is a string instead of a number. This makes the + do string concatenation. ‘2’ + 2 === ’22’; // true 2 + 2 === 4; // true The other arithmetic operators / * – will perform a toNumber conversion on the string(s). ‘3’ * ‘5’ === 15; // … Read more
Floating point addition is not necessarily associative. If you change the order in which you add things up, this can change the result. The standard paper on the subject is What Every Computer Scientist Should Know about Floating Point Arithmetic. It gives the following example: Another grey area concerns the interpretation of parentheses. Due to … Read more
The result of adding Java chars, shorts, or bytes is an int: Java Language Specification on Binary Numeric Promotion: If any of the operands is of a reference type, unboxing conversion (ยง5.1.8) is performed. Then: If either operand is of type double, the other is converted to double. Otherwise, if either operand is of type … Read more
You have the line dots = document.getElementById(“txt”).value; in your file, this will set dots to be a string because the contents of txt is not restricted to a number. to convert it to an int change the line to: dots = parseInt(document.getElementById(“txt”).value, 10); Note: The 10 here specifies decimal (base-10). Without this some browsers may … Read more
First of all, your ternary operator seems to be quite repetetive. There is a way to make it shorter: totalPrice = salesPrice + ( salesPrice <= 25 ? minShipping : maxShipping ); Then, it is a good habit to declare your variables before you use them using var keyword. In this particular case the advice … Read more
You are using the same name, squidAttack, for both the variable and the function. Rename one of them and it will work fine.