API tools faq
paste
Advertisement
Guest User

Untitled

a guest
Dec 19th, 2014
140
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
text 14.49 KB | None | 0 0
raw download clone embed print report
  1. var functionOne = function() {
  2. // Some code
  3. };
  4.  
  5. function functionTwo() {
  6. // Some code
  7. }
  8.  
  9. <script>
  10. // Error
  11. functionOne();
  12.  
  13. var functionOne = function() {
  14. };
  15. </script>
  16.  
  17. <script>
  18. // No error
  19. functionTwo();
  20.  
  21. function functionTwo() {
  22. }
  23. </script>
  24.  
  25. <script>
  26. "use strict";
  27. if (test) {
  28. // Error
  29. function functionThree() { doSomething(); }
  30. }
  31. </script>
  32.  
  33. function xyz(){
  34. function abc(){};
  35. // abc is defined here...
  36. }
  37. // ...but not here
  38.  
  39. var xyz = function abc(){};
  40.  
  41. var xyz = function abc(){
  42. // xyz is visible here
  43. // abc is visible here
  44. }
  45. // xyz is visible here
  46. // abc is undefined here
  47.  
  48. function abc(){};
  49. var xyz = abc;
  50.  
  51. console.log(xyz === abc); // prints "true"
  52.  
  53. function abc(){};
  54. console.log(abc.name); // prints "abc"
  55.  
  56. var abc = function(){};
  57. console.log(abc.name); // prints ""
  58.  
  59. // assume really.long.external.scoped is {}
  60. really.long.external.scoped.name = function shortcut(n){
  61. // let's call itself recursively:
  62. shortcut(n - 1);
  63. // ...
  64. // let's pass itself as a callback:
  65. someFunction(shortcut);
  66. // ...
  67. }
  68.  
  69. function abc(){}
  70.  
  71. // we can call it here
  72. abc(); // works
  73. // yet it is defined down there
  74. function abc(){}
  75. // we can call it again
  76. abc(); // works
  77.  
  78. var xyz = function(){};
  79.  
  80. // we can't call it here
  81. xyz(); // UNDEFINED!!!
  82. // now it is defined
  83. xyz = function(){}
  84. // we can call it here
  85. xyz(); // works
  86.  
  87. var xyz = function abc(){};
  88. console.log(xyz.name); // prints "abc"
  89.  
  90. var abc = function(){};
  91.  
  92. abc = function(){};
  93.  
  94. function abc(){};
  95.  
  96. alert(typeof foo); // 'function', it's already available
  97. alert(typeof bar); // 'undefined'
  98. function foo () {}
  99. var bar = function () {};
  100. alert(typeof bar); // 'function'
  101.  
  102. function test () {}
  103. test = null;
  104.  
  105. (function(){
  106. var exports = {};
  107.  
  108. function privateUtil() {
  109. ...
  110. }
  111.  
  112. exports.publicUtil = function() {
  113. ...
  114. };
  115.  
  116. return exports;
  117. })();
  118.  
  119. function x() {
  120. console.log('x');
  121. }
  122.  
  123. x(); // Works even though it's above the declaration
  124. function x() {
  125. console.log('x');
  126. }
  127.  
  128. if (someCondition) {
  129. function foo() { // <===== INVALID AND WILL FAIL ON
  130. } // MANY ENGINES
  131. }
  132.  
  133. var y = function () {
  134. console.log('y');
  135. };
  136.  
  137. var z = function w() {
  138. console.log('zw')
  139. };
  140.  
  141. var z = function w() {
  142. console.log(typeof w); // "function"
  143. };
  144. console.log(typeof w); // "undefined"
  145.  
  146. var MyNamespace = {}
  147. MyNamespace.foo= function() {
  148.  
  149. }
  150.  
  151. var MyNamespace {
  152. foo: function() {
  153. },
  154. ...
  155. }
  156.  
  157. functionTwo();
  158. function functionTwo() {
  159. }
  160.  
  161. functionOne(); --------------- var functionOne;
  162. | is actually | functionOne();
  163. var functionOne = function(){ | interpreted |-->
  164. }; | like | functionOne = function(){
  165. --------------- };
  166.  
  167. functionTwo(); --------------- function functionTwo() {
  168. | is actually | };
  169. function functionTwo() { | interpreted |-->
  170. } | like | functionTwo();
  171. ---------------
  172.  
  173. if (condition){
  174. function myfunction(){
  175. // some code
  176. }
  177. }
  178.  
  179. if (condition){
  180. var myfunction = function (){
  181. // some code
  182. }
  183. }
  184.  
  185. var foo = 1;
  186. function bar() {
  187. if (!foo) {
  188. var foo = 10 }
  189. return foo; }
  190. bar() // 10
  191.  
  192. function f() {
  193. return a;
  194. function a() {return 1};
  195. var a = 4;
  196. function a() {return 2}}
  197. f()() // 2
  198.  
  199. function f() {
  200. return a;
  201. var a = 4;
  202. function a() {return 1};
  203. function a() {return 2}}
  204. f()() // 2
  205.  
  206. function f() {
  207. var a = 4;
  208. function a() {return 1};
  209. function a() {return 2};
  210. return a; }
  211. f() // 4
  212.  
  213. var a = 1;
  214. function b() {
  215. a = 10;
  216. return;
  217. function a() {}}
  218. b();
  219. a // 1
  220.  
  221. function abc(){}
  222.  
  223. var abc = function() {};
  224.  
  225. //this will work
  226. abc(param);
  227. function abc(){}
  228.  
  229. //this would fail
  230. abc(param);
  231. var abc = function() {}
  232.  
  233. var ninja = {
  234. yell: function(n){
  235. return n > 0 ? ninja.yell(n-1) + "a" : "hiy";
  236. }
  237. };
  238. assert( ninja.yell(4) == "hiyaaaa", "A single object isn't too bad, either." );
  239.  
  240. var samurai = { yell: ninja.yell };
  241. var ninja = null;
  242.  
  243. try {
  244. samurai.yell(4);
  245. } catch(e){
  246. assert( false, "Uh, this isn't good! Where'd ninja.yell go?" );
  247. }
  248.  
  249. var ninja = {
  250. yell: function yell(n){
  251. return n > 0 ? yell(n-1) + "a" : "hiy";
  252. }
  253. };
  254. assert( ninja.yell(4) == "hiyaaaa", "Works as we would expect it to!" );
  255.  
  256. var samurai = { yell: ninja.yell };
  257. var ninja = {};
  258. assert( samurai.yell(4) == "hiyaaaa", "The method correctly calls itself." );
  259.  
  260. function foo() {
  261. return 3;
  262. }
  263.  
  264. //anonymous function expression
  265. var a = function() {
  266. return 3;
  267. }
  268.  
  269. //named function expression
  270. var a = function foo() {
  271. return 3;
  272. }
  273.  
  274. //self invoking function expression
  275. (function foo() {
  276. alert("hello!");
  277. })();
  278.  
  279. var objectOne = new functionOne();
  280. console.log(objectOne.__proto__); // prints "Object {}" because constructor is an anonymous function
  281.  
  282. var objectTwo = new functionTwo();
  283. console.log(objectTwo.__proto__); // prints "functionTwo {}" because constructor is a named function
  284.  
  285. var functionOne = function() {
  286. // Some code
  287. };
  288.  
  289. var one = new functionOne();
  290.  
  291. function functionTwo() {
  292. // Some code
  293. }
  294. two = new functionTwo();
  295.  
  296. [].forEach(function iterator() {});
  297.  
  298. 'use strict';
  299.  
  300. var a = function () {
  301. throw new Error();
  302. },
  303. b = function b() {
  304. throw new Error();
  305. },
  306. c = function d() {
  307. throw new Error();
  308. },
  309. e = {
  310. f: a,
  311. g: b,
  312. h: c,
  313. i: function () {
  314. throw new Error();
  315. },
  316. j: function j() {
  317. throw new Error();
  318. },
  319. k: function l() {
  320. throw new Error();
  321. }
  322. },
  323. m = (function () {
  324. return function () {
  325. throw new Error();
  326. };
  327. }()),
  328. n = (function () {
  329. return function n() {
  330. throw new Error();
  331. };
  332. }()),
  333. o = (function () {
  334. return function p() {
  335. throw new Error();
  336. };
  337. }());
  338.  
  339. console.log([a, b, c].concat(Object.keys(e).reduce(function (values, key) {
  340. return values.concat(e[key]);
  341. }, [])).concat([m, n, o]).reduce(function (logs, func) {
  342.  
  343. try {
  344. func();
  345. } catch (error) {
  346. return logs.concat('func.name: ' + func.name + 'n' +
  347. 'Trace:n' +
  348. error.stack);
  349. // Need to manually log the error object in Nitro.
  350. }
  351.  
  352. }, []).join('nn'));
  353.  
  354. func.name:
  355. Trace:
  356. Error
  357. at a (http://localhost:8000/test.js:4:11)
  358. at http://localhost:8000/test.js:47:9
  359. at Array.reduce (native)
  360. at http://localhost:8000/test.js:44:27
  361.  
  362. func.name: b
  363. Trace:
  364. Error
  365. at b (http://localhost:8000/test.js:7:15)
  366. at http://localhost:8000/test.js:47:9
  367. at Array.reduce (native)
  368. at http://localhost:8000/test.js:44:27
  369.  
  370. func.name: d
  371. Trace:
  372. Error
  373. at d (http://localhost:8000/test.js:10:15)
  374. at http://localhost:8000/test.js:47:9
  375. at Array.reduce (native)
  376. at http://localhost:8000/test.js:44:27
  377.  
  378. func.name:
  379. Trace:
  380. Error
  381. at a (http://localhost:8000/test.js:4:11)
  382. at http://localhost:8000/test.js:47:9
  383. at Array.reduce (native)
  384. at http://localhost:8000/test.js:44:27
  385.  
  386. func.name: b
  387. Trace:
  388. Error
  389. at b (http://localhost:8000/test.js:7:15)
  390. at http://localhost:8000/test.js:47:9
  391. at Array.reduce (native)
  392. at http://localhost:8000/test.js:44:27
  393.  
  394. func.name: d
  395. Trace:
  396. Error
  397. at d (http://localhost:8000/test.js:10:15)
  398. at http://localhost:8000/test.js:47:9
  399. at Array.reduce (native)
  400. at http://localhost:8000/test.js:44:27
  401.  
  402. func.name:
  403. Trace:
  404. Error
  405. at e.i (http://localhost:8000/test.js:17:19)
  406. at http://localhost:8000/test.js:47:9
  407. at Array.reduce (native)
  408. at http://localhost:8000/test.js:44:27
  409.  
  410. func.name: j
  411. Trace:
  412. Error
  413. at j (http://localhost:8000/test.js:20:19)
  414. at http://localhost:8000/test.js:47:9
  415. at Array.reduce (native)
  416. at http://localhost:8000/test.js:44:27
  417.  
  418. func.name: l
  419. Trace:
  420. Error
  421. at l (http://localhost:8000/test.js:23:19)
  422. at http://localhost:8000/test.js:47:9
  423. at Array.reduce (native)
  424. at http://localhost:8000/test.js:44:27
  425.  
  426. func.name:
  427. Trace:
  428. Error
  429. at http://localhost:8000/test.js:28:19
  430. at http://localhost:8000/test.js:47:9
  431. at Array.reduce (native)
  432. at http://localhost:8000/test.js:44:27
  433.  
  434. func.name: n
  435. Trace:
  436. Error
  437. at n (http://localhost:8000/test.js:33:19)
  438. at http://localhost:8000/test.js:47:9
  439. at Array.reduce (native)
  440. at http://localhost:8000/test.js:44:27
  441.  
  442. func.name: p
  443. Trace:
  444. Error
  445. at p (http://localhost:8000/test.js:38:19)
  446. at http://localhost:8000/test.js:47:9
  447. at Array.reduce (native)
  448. at http://localhost:8000/test.js:44:27 test.js:42
  449.  
  450. func.name:
  451. Trace:
  452. a@http://localhost:8000/test.js:4:5
  453. @http://localhost:8000/test.js:47:9
  454. @http://localhost:8000/test.js:54:1
  455.  
  456.  
  457. func.name: b
  458. Trace:
  459. b@http://localhost:8000/test.js:7:9
  460. @http://localhost:8000/test.js:47:9
  461. @http://localhost:8000/test.js:54:1
  462.  
  463.  
  464. func.name: d
  465. Trace:
  466. d@http://localhost:8000/test.js:10:9
  467. @http://localhost:8000/test.js:47:9
  468. @http://localhost:8000/test.js:54:1
  469.  
  470.  
  471. func.name:
  472. Trace:
  473. a@http://localhost:8000/test.js:4:5
  474. @http://localhost:8000/test.js:47:9
  475. @http://localhost:8000/test.js:54:1
  476.  
  477.  
  478. func.name: b
  479. Trace:
  480. b@http://localhost:8000/test.js:7:9
  481. @http://localhost:8000/test.js:47:9
  482. @http://localhost:8000/test.js:54:1
  483.  
  484.  
  485. func.name: d
  486. Trace:
  487. d@http://localhost:8000/test.js:10:9
  488. @http://localhost:8000/test.js:47:9
  489. @http://localhost:8000/test.js:54:1
  490.  
  491.  
  492. func.name:
  493. Trace:
  494. e.i@http://localhost:8000/test.js:17:13
  495. @http://localhost:8000/test.js:47:9
  496. @http://localhost:8000/test.js:54:1
  497.  
  498.  
  499. func.name: j
  500. Trace:
  501. j@http://localhost:8000/test.js:20:13
  502. @http://localhost:8000/test.js:47:9
  503. @http://localhost:8000/test.js:54:1
  504.  
  505.  
  506. func.name: l
  507. Trace:
  508. l@http://localhost:8000/test.js:23:13
  509. @http://localhost:8000/test.js:47:9
  510. @http://localhost:8000/test.js:54:1
  511.  
  512.  
  513. func.name:
  514. Trace:
  515. m</<@http://localhost:8000/test.js:28:13
  516. @http://localhost:8000/test.js:47:9
  517. @http://localhost:8000/test.js:54:1
  518.  
  519.  
  520. func.name: n
  521. Trace:
  522. n@http://localhost:8000/test.js:33:13
  523. @http://localhost:8000/test.js:47:9
  524. @http://localhost:8000/test.js:54:1
  525.  
  526.  
  527. func.name: p
  528. Trace:
  529. p@http://localhost:8000/test.js:38:13
  530. @http://localhost:8000/test.js:47:9
  531. @http://localhost:8000/test.js:54:1
  532.  
  533. func.name: undefined
  534. Trace:
  535. Error
  536. at a (http://localhost:8000/test.js:4:5)
  537. at Anonymous function (http://localhost:8000/test.js:47:9)
  538. at Global code (http://localhost:8000/test.js:42:1)
  539.  
  540.  
  541. func.name: undefined
  542. Trace:
  543. Error
  544. at b (http://localhost:8000/test.js:7:9)
  545. at Anonymous function (http://localhost:8000/test.js:47:9)
  546. at Global code (http://localhost:8000/test.js:42:1)
  547.  
  548.  
  549. func.name: undefined
  550. Trace:
  551. Error
  552. at d (http://localhost:8000/test.js:10:9)
  553. at Anonymous function (http://localhost:8000/test.js:47:9)
  554. at Global code (http://localhost:8000/test.js:42:1)
  555.  
  556.  
  557. func.name: undefined
  558. Trace:
  559. Error
  560. at a (http://localhost:8000/test.js:4:5)
  561. at Anonymous function (http://localhost:8000/test.js:47:9)
  562. at Global code (http://localhost:8000/test.js:42:1)
  563.  
  564.  
  565. func.name: undefined
  566. Trace:
  567. Error
  568. at b (http://localhost:8000/test.js:7:9)
  569. at Anonymous function (http://localhost:8000/test.js:47:9)
  570. at Global code (http://localhost:8000/test.js:42:1)
  571.  
  572.  
  573. func.name: undefined
  574. Trace:
  575. Error
  576. at d (http://localhost:8000/test.js:10:9)
  577. at Anonymous function (http://localhost:8000/test.js:47:9)
  578. at Global code (http://localhost:8000/test.js:42:1)
  579.  
  580.  
  581. func.name: undefined
  582. Trace:
  583. Error
  584. at e.i (http://localhost:8000/test.js:17:13)
  585. at Anonymous function (http://localhost:8000/test.js:47:9)
  586. at Global code (http://localhost:8000/test.js:42:1)
  587.  
  588.  
  589. func.name: undefined
  590. Trace:
  591. Error
  592. at j (http://localhost:8000/test.js:20:13)
  593. at Anonymous function (http://localhost:8000/test.js:47:9)
  594. at Global code (http://localhost:8000/test.js:42:1)
  595.  
  596.  
  597. func.name: undefined
  598. Trace:
  599. Error
  600. at l (http://localhost:8000/test.js:23:13)
  601. at Anonymous function (http://localhost:8000/test.js:47:9)
  602. at Global code (http://localhost:8000/test.js:42:1)
  603.  
  604.  
  605. func.name: undefined
  606. Trace:
  607. Error
  608. at Anonymous function (http://localhost:8000/test.js:28:13)
  609. at Anonymous function (http://localhost:8000/test.js:47:9)
  610. at Global code (http://localhost:8000/test.js:42:1)
  611.  
  612.  
  613. func.name: undefined
  614. Trace:
  615. Error
  616. at n (http://localhost:8000/test.js:33:13)
  617. at Anonymous function (http://localhost:8000/test.js:47:9)
  618. at Global code (http://localhost:8000/test.js:42:1)
  619.  
  620.  
  621. func.name: undefined
  622. Trace:
  623. Error
  624. at p (http://localhost:8000/test.js:38:13)
  625. at Anonymous function (http://localhost:8000/test.js:47:9)
  626. at Global code (http://localhost:8000/test.js:42:1)
  627.  
  628. func.name:
  629. Trace:
  630. a@http://localhost:8000/test.js:4:22
  631. http://localhost:8000/test.js:47:13
  632. reduce@[native code]
  633. global code@http://localhost:8000/test.js:44:33
  634.  
  635. func.name: b
  636. Trace:
  637. b@http://localhost:8000/test.js:7:26
  638. http://localhost:8000/test.js:47:13
  639. reduce@[native code]
  640. global code@http://localhost:8000/test.js:44:33
  641.  
  642. func.name: d
  643. Trace:
  644. d@http://localhost:8000/test.js:10:26
  645. http://localhost:8000/test.js:47:13
  646. reduce@[native code]
  647. global code@http://localhost:8000/test.js:44:33
  648.  
  649. func.name:
  650. Trace:
  651. a@http://localhost:8000/test.js:4:22
  652. http://localhost:8000/test.js:47:13
  653. reduce@[native code]
  654. global code@http://localhost:8000/test.js:44:33
  655.  
  656. func.name: b
  657. Trace:
  658. b@http://localhost:8000/test.js:7:26
  659. http://localhost:8000/test.js:47:13
  660. reduce@[native code]
  661. global code@http://localhost:8000/test.js:44:33
  662.  
  663. func.name: d
  664. Trace:
  665. d@http://localhost:8000/test.js:10:26
  666. http://localhost:8000/test.js:47:13
  667. reduce@[native code]
  668. global code@http://localhost:8000/test.js:44:33
  669.  
  670. func.name:
  671. Trace:
  672. i@http://localhost:8000/test.js:17:30
  673. http://localhost:8000/test.js:47:13
  674. reduce@[native code]
  675. global code@http://localhost:8000/test.js:44:33
  676.  
  677. func.name: j
  678. Trace:
  679. j@http://localhost:8000/test.js:20:30
  680. http://localhost:8000/test.js:47:13
  681. reduce@[native code]
  682. global code@http://localhost:8000/test.js:44:33
  683.  
  684. func.name: l
  685. Trace:
  686. l@http://localhost:8000/test.js:23:30
  687. http://localhost:8000/test.js:47:13
  688. reduce@[native code]
  689. global code@http://localhost:8000/test.js:44:33
  690.  
  691. func.name:
  692. Trace:
  693. http://localhost:8000/test.js:28:30
  694. http://localhost:8000/test.js:47:13
  695. reduce@[native code]
  696. global code@http://localhost:8000/test.js:44:33
  697.  
  698. func.name: n
  699. Trace:
  700. n@http://localhost:8000/test.js:33:30
  701. http://localhost:8000/test.js:47:13
  702. reduce@[native code]
  703. global code@http://localhost:8000/test.js:44:33
  704.  
  705. func.name: p
  706. Trace:
  707. p@http://localhost:8000/test.js:38:30
  708. http://localhost:8000/test.js:47:13
  709. reduce@[native code]
  710. global code@http://localhost:8000/test.js:44:33
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement
Public Pastes
Advertisement
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!