Table-4 Not

Not !

The boolean "not" operation inverts true and false
Takes the "opposite" of whatever is inside in the parentheses
Syntax: !(expression)
The exclamation mark (!) signifies not
Parentheses marks off what we want to "not"
Expression - anything that can go in an if statement!
Boolean logic, startsWith/endsWith, <, >, ==
Works on part of a boolean logic statement too
Example: if (row.getField("gender") == "girl" &&
!(row.getField("rank") > 10))

Not Code Experiments

table = new SimpleTable("baby-2010.csv");
for (row: table) {
  if (--your code here--) {
    print(row);
  }
}

table4-1

Experiments to try:

1. girl names starting with "A" (no "nots" in this one)
2. girl names not starting with "A"
3. names starting with "A" and not ending with "y"
4. names starting with "A" and ending with "y" and not equal to "Abbey"

Experiment solution code:

If logic inside the loop:

  // 1
  if (row.getField("name").startsWith("A") &&
      row.getField("gender") == "girl") {
    print(row);
  }

  // 2
  if (!(row.getField("name").startsWith("A")) &&
      row.getField("gender") == "girl") {
    print(row);
  }

  // 3
  if (row.getField("name").startsWith("A") &&
      !(row.getField("name").endsWith("y"))) {
    print(row);
  }

  // 4
  if (row.getField("name").startsWith("A") &&
      row.getField("name").endsWith("y") &&
      !(row.getField("name") == "Abbey")) {
    print(row);
  }

> exercises