The weather app indicates it’s 39 degrees outside, but it feels more like 9 degrees due to the biting cold wind. We currently have a high wind warning in effect, and the pellet stove has been running since this morning to keep us warm. Sandy is feeling chilly, so she’s curled up in my lap.
Last night, we experienced a power outage caused by the strong winds. Fortunately, the power was restored around 6 this morning. Later, Kel and I went to the post office to pick up a package. Lexi spent time with friends at the botanical gardens today, while Kel is visiting her dad at the hospital, which is encouraging as he seems to be doing much better today.
In my coding session today, I’m working on a method to find the missing number in an array, and here’s what the console.log looks like:
console.log(findMissingNumber([1, 2, 4, 5, 6])); // 3
The skeleton of the code looks like this:
function findMissingNumber(arr) {
// code here
}
I’m having a bit of a mental block today. I’ve come across an approach using the sum formula:
To calculate the expected sum of numbers from 1 to N, we can use the formula: S = N(N + 1) / 2. Next, we compute the actual sum of the numbers in the array. The missing number can then be found using the equation: Missing Number = S – (Sum of array elements).
The formula itself is straightforward; now I need to determine how to implement this in a function. According to Google, the reduce() method can be utilized. This method returns a single value, which is the accumulated result of the function. So, let’s start by finding the value of N and applying the sum formula.
function findMissingNumber(arr) {
// Find the value of N (the maximum expected number)
let N = arr.length + 1;
// Calculate the expected sum of numbers from 1 to N
let expectedSum = (N * (N + 1)) / 2;
}
We need to calculate the sum of all the elements in the given array and then determine the missing number by finding the difference between the expected sum and the actual sum of the array’s elements. This concept is starting to confuse me a bit. Even though I managed to go back to sleep this morning, the initial three hours of rest I got before the power outage are beginning to take their toll.
I’m having a bit of a difficult day trying to think clearly. My phone is currently charging on Tommy’s desk because every time I plug my cable into the hub on my desk, it stops supplying power. It’s hard to explain, but the hub simply stops functioning. As a result, I’m using Tommy’s charger to charge my phone. I also attempted to connect the cable to my computer, but it indicated that the cable requires much more power than the port can provide. This is a problem I’ve never encountered before. The issue appears to be with the cable itself, as I’ve disconnected it from my phone while testing various ports. I plan to try plugging the cable into the Uninterrupted Power Supply (UPS) later to see if it will charge my phone. For now, I can’t charge my iPad either since that cable is meant for it. I need to figure this out.
I’ll look for another lightning cable. I just plugged in a different one, and it’s working! My iPad is now charging. However, I can’t understand why the previous lightning cable caused the hub to stop working. It’s quite strange. That cable was my favorite—mint green and pretty. Now, unfortunately, it’s not functioning anymore. Ok, I plugged it into the UPS and tried to power my phone and it doesn’t work. So the cable is now trash.
It seems I’m not particularly hungry today either. I had a couple of eggs this morning, and that’s been about it. A few cups of coffee made me feel quite full, and I also enjoyed a cup of tea, which contributed to that sense of fullness. Tommy is coming home early today, so I’ll have dinner here soon. Since Kel is still down in the city, I was considering just having hot dogs for dinner—something quick and easy.
The weather needs to warm up soon, as I would like to set up my new desk. We can’t stain the wood in the cold. I’m eager to organize my stationery and arrange my desk, but I find myself feeling a bit impatient. In the meantime, Lexi’s tax documents are cluttering my workspace. I wonder if I might tackle her taxes tonight. I’ve never actually handled taxes myself; I’ve always relied on someone else to do them. It seems fairly straightforward, so I think I can manage it.
