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static/js/ketcher2/node_modules/tryit/README.md
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# tryit
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Tiny module wrapping try/catch in JavaScript.
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It's *literally 11 lines of code*, [just read it](tryit.js) that's all the documentation you'll need.
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## install
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```
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npm install tryit
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```
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## usage
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What you'd normally do:
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```js
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try {
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dangerousThing();
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} catch (e) {
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console.log('something');
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}
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```
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With try-it (all it does is wrap try-catch)
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```js
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var tryit = require('tryit');
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tryit(dangerousThing);
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```
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You can also handle the error by passing a second function
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```js
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tryit(dangerousThing, function (e) {
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if (e) {
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console.log('do something');
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}
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})
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```
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The second function follows error-first pattern common in node. So if you pass a callback it gets called in both cases. But will have an error as the first argument if it fails.
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## WHAT? WHY DO THIS!?
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Primary motivation is having a clean way to wrap things that might fail, where I don't care if it fails. I just want to try it.
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This includes stuff like blindly reading/parsing stuff from localStorage in the browser. If it's not there or if parsing it fails, that's fine. But I don't want to leave a bunch of empty `catch (e) {}` blocks in the code.
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Obviously, this is useful any time you're going to attempt to read some unknown data structure.
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In addition, my understanding is that it's hard for JS engines to optimize code in try blocks. By actually passing the code to be executed into a re-used try block, we can avoid having to have more than a single try block in our app. Again, this is not a primary motivation, just a potential side benefit.
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## license
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[MIT](http://mit.joreteg.com/)
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static/js/ketcher2/node_modules/tryit/package.json
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static/js/ketcher2/node_modules/tryit/package.json
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{
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"_from": "tryit@^1.0.1",
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"_id": "tryit@1.0.3",
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"_inBundle": false,
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"_integrity": "sha1-OTvnMKlEb9Hq1tpZoBQwjzbCics=",
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"_location": "/tryit",
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"_phantomChildren": {},
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"_requested": {
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"type": "range",
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"registry": true,
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"raw": "tryit@^1.0.1",
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"name": "tryit",
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"escapedName": "tryit",
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"rawSpec": "^1.0.1",
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"saveSpec": null,
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"fetchSpec": "^1.0.1"
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},
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"_requiredBy": [
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"/is-resolvable"
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],
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"_resolved": "https://registry.npmjs.org/tryit/-/tryit-1.0.3.tgz",
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"_shasum": "393be730a9446fd1ead6da59a014308f36c289cb",
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"_spec": "tryit@^1.0.1",
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"_where": "/home/manfred/enviPath/ketcher2/ketcher/node_modules/is-resolvable",
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"author": {
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"name": "Henrik Joreteg",
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"email": "henrik@andyet.net"
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},
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"bugs": {
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"url": "https://github.com/HenrikJoreteg/tryit/issues"
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},
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"bundleDependencies": false,
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"deprecated": false,
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"description": "Module to wrap try-catch for better performance and cleaner API.",
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"devDependencies": {
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"tap-spec": "^2.1.2",
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"tape": "^3.0.3"
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},
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"files": [
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"tryit.js"
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],
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"homepage": "https://github.com/HenrikJoreteg/tryit#readme",
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"keywords": [
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"errors",
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"try",
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"errorhandling"
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],
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"license": "MIT",
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"main": "tryit.js",
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"name": "tryit",
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"repository": {
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"type": "git",
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"url": "git+ssh://git@github.com/HenrikJoreteg/tryit.git"
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},
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"scripts": {
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"test": "node test/test.js | tap-spec"
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},
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"version": "1.0.3"
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}
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14
static/js/ketcher2/node_modules/tryit/tryit.js
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static/js/ketcher2/node_modules/tryit/tryit.js
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// tryit
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// Simple, re-usuable try-catch, this is a performance optimization
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// and provides a cleaner API.
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module.exports = function (fn, cb) {
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var err;
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try {
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fn();
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} catch (e) {
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err = e;
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}
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if (cb) cb(err || null);
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};
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