loops exercise

04week/loop.js

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+// 1. Use a do...while loop to console.log the numbers from 1 to 1000.
+
+let i = 0;
+do {
+	i++;
+	console.log(i);
+} while (i < 1001);
+
+// 2. Create an object (an array with keys and values) called person with the following data:
+
+var array = {
+	firstName: "Jane",
+	lastName: "Doe",
+	birthDate: "Jan 5, 1925",
+	gender: "female"
+};
+// 3. Use a for...in loop and if statement to console.log the value associated with the key birthDate if the birth year is an odd number.
+let o = parseInt(array.birthDate[array.birthDate.length - 1]);
+console.log(o); // line 20 is singling out the line in the array, the text in the brackets [] is singling out the index in the
+
+for (array.birthDate in array) {
+	if (o % 2 == !0) {
+		console.log(o);
+		break;
+	} else {
+		console.log("not an odd number");
+		break;
+	}
+}
+// 4. Create an arrayOfPersons that contains multiple objects. You can simply copy/paste the person object you made above multiple times. Feel free to change the values to reflect multiple people you might have in your database.
+
+let arrayOfPersons = [
+	{
+		firstName: "Jane",
+		lastName: "Doe",
+		birthDate: "Jan 5, 1925",
+		gender: "female"
+	},
+	{
+		firstName: "Kevin",
+		lastName: "Jenkins",
+		birthDate: "Jul 9, 1988",
+		gender: "male"
+	},
+	{
+		firstName: "Genice",
+		lastName: "Ferguson",
+		birthDate: "Apr 20, 2019",
+		gender: "female"
+	},
+	{
+		firstName: "Kylie",
+		lastName: "Jade",
+		birthDate: "Apr 29, 2014",
+		gender: "female"
+	}
+];
+
+// #5 Use .map() to map over the arrayOfPersons and console.log() their information.
+
+// arrayOfPersons.map(element => {
+// console.log(element);
+// })
+
+// #6 Use .filter() to filter the persons array and console.log only males in the array.
+
+// arrayOfPersons.filter(sex =>{ //sex => is the same as writing (function(sex))
+//   if(sex.gender == "male"){
+//     console.log(sex.firstName + " " + sex.lastName);
+//   }
+// });
+
+// #7 Use .filter() to filter the persons array and console.log only people that were born before Jan 1, 1990.
+
+// let date = (arrayOfPersons.birthDate [arrayOfPersons.birthDate.length]);
+// console.log(date);
+
+// let date = arrayOfPersons.filter(birthday =>{
+//   if(birthday.birthDate. < 1990){
+//     console.log()
+//   }
+// });
+
+let date = arrayOfPersons.filter(birthYear => {
+	//fat arrow function that accomplishes the same function Grant specified
+	let r = /[' ']\d{4}/;
+
+	let stringElements = birthYear.birthDate;
+
+	//now that stringElements is a string, I can use match() to compare the value to my regex criteria.
+	if (stringElements.match(r) <= 1990) {
+		console.log(birthYear.firstName + " " + birthYear.lastName);
+	}
+});