## 2008年12月12日金曜日

### JavaFX　Expressions　文法

Block Expressions　文法
`var nums = [5, 7, 3, 9];var total = {     var sum = 0;     for (a in nums) { sum += a };     sum;}println("Total is {total}.");  // Total is 24`

The if Expression
`def age = 8;var ticketPrice;0if (age < 5 ) {     ticketPrice = 0;} else if (age < 12 or age > 65) {     ticketPrice = 5;} else {     ticketPrice = 10;}println("Age: {age} Ticket Price: {ticketPrice} dollars.");`

`ticketPrice = if (age < 5) 0 else if (age > 5 and age < 12) 5 else 10;`

Range Expressions
`var num = [0..5];var nums = [1..10 step 2];  // [ 1, 3, 5, 7, 9 ]var nums = [10..1 step -1]; // [ 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 ]`

The for Expression
`var days = ["Mon","Tue","Wed","Thu","Fri","Sat","Sun"];for (day in days) {     println(day);}// Resulting sequence squares the values from the original sequence.var squares = for (i in [1..10]) i*i; // Resulting sequence is ["MON", "TUE", "WED", and so on...]var capitalDays = for (day in days) day.toUpperCase(); `

The while Expression
`var count = 0;while (count < 10) {    println("count == {count}");    count++;} `

The break and continue Expressions
`for (i in [0..10]) {     if (i > 5) {          break;     }     if (i mod 2 == 0) {          continue;     }     println(i);}`

The throw, try, catch and finally Expressions
`try {     foo();} catch (e: Exception) {     println("{e.getMessage()} (but we caught it)");} finally {     println("We are now in the finally expression...");}function foo() {     var somethingWeird = false;     if(somethingWeird){          throw new Exception("Something weird just happened!");     } else {          println("We made it through the function.");     }}`