サイ本勉強会スライド

1. 6

3. var
var name_1 [ = value_1 ] [ , ..., name_n [ = value_n ]]
→ Call
→

4. function
function funcname ([arg1 [, arg2 [..., argn]]]) {
statement
}

5. •
•
•

6. function hoge() {
huga();
function huga() {
console.log("piyopiyo");
}
}
hoge(); // “piyopiyo”

7. return
return expression;

8. throw
throw expression;

9. Q. JavaScript
A.

10. Error
function hoge() {
try {
throw "hogehogehgoe";
}
catch(e) {
console.log(e);
}
}
hoge(); // “hogehogehoge”

11. 1.
2. catch
3.

12. try/catch/finaly
● ●

13. try {
throw new Error(" ");
//
}
catch(e) {
// try
console.log(e) // " "
}
finaly {
// try
// try
//
}

14. finally
•
• break , continue , return
• catch
•

15. function testfinally(a) {
try {
throw new Error(" ");
}
finally {
console.log(a);
}
}
testfinally("hogehogehogehoge");

16. [takashi ~ 09:55 AM] $ node statement2.js
hogehogehogehoge //
node.js:63
throw e;
^
Error: //

17. function testfinally(a) {
try {
throw new Error(" ");
}
catch(e) {
throw new Error(" ");
}
finally {
console.log(a);
throw new Error(" ");
}
}
testfinally("hogehogehogehoge");

18. [takashi ~ 10:01 AM] $ node statement2.js
hogehogehogehoge
node.js:63
throw e;
^
Error:

19. with
with (object)
statement

20. with
by dankogai
http://blog.livedoor.jp/dankogai/archives/51066288.html

21. var foo = { bar : 1 };
var bar = 2;
console.log(bar);
with(foo){
console.log(bar);
delete foo['bar'];
console.log(bar);
}
[takashi ~ 10:10 AM] $ node dankogai1.js
2 // bar
1 // foo bar
2 // bar

22. • with(object) object
• object.name name
” with() without
with()
with(Math) with(new Namespace())
”