구차니의 잡동사니 모음

$ npm install

> sqlite3@4.0.4 install D:\work2\hjelec_tf\node\node_modules\sqlite3

> node-pre-gyp install --fallback-to-build

'node-pre-gyp'은(는) 내부 또는 외부 명령, 실행할 수 있는 프로그램, 또는

배치 파일이 아닙니다.

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! sqlite3@4.0.4 install: `node-pre-gyp install --fallback-to-build`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the sqlite3@4.0.4 install script.

npm ERR! This is probably not a problem with npm. There is likely additional logging output above. 

The maximum number of decimals is 17, but floating point arithmetic is not always 100% accurate:

Example

var x = 0.2 + 0.1;         // x will be 0.30000000000000004 

$ node

> var tt = [39,91,92,39,105,110,112,117,116,35,115,101,108,95,48,95,49,92,39,44,92,39,105,110,112,117,116,35,115,101,108,95,48,95,51,92,39,44,92,39,105,110,112,117,116,35,115,101,108,95,48,95,53,92,39,93,39]

undefined

> var buffer = new Buffer(tt)

undefined

> buffer

<Buffer 27 5b 5c 27 69 6e 70 75 74 23 73 65 6c 5f 30 5f 31 5c 27 2c 5c 27 69 6e 70 75 74 23 73 65 6c 5f 30 5f 33 5c 27 2c 5c 27 69 6e 70 75 74 23 73 65 6c 5f ... >

> buffer.toString('base64')

'J1tcJ2lucHV0I3NlbF8wXzFcJyxcJ2lucHV0I3NlbF8wXzNcJyxcJ2lucHV0I3NlbF8wXzVcJ10n'

> var buffer = new Buffer(tt, 'binary')

undefined

> buffer.toString('base64')

'J1tcJ2lucHV0I3NlbF8wXzFcJyxcJ2lucHV0I3NlbF8wXzNcJyxcJ2lucHV0I3NlbF8wXzVcJ10n'

> tt.toString('utf-8')

'39,91,92,39,105,110,112,117,116,35,115,101,108,95,48,95,49,92,39,44,92,39,105,110,112,117,116,35,115,101,108,95,48,95,51,92,39,44,92,39,105,110,112,117,116,35,115,101,108,95,48,95,53,92,39,93,39'

> buffer.toString('utf-8')

'\'[\\\'input#sel_0_1\\\',\\\'input#sel_0_3\\\',\\\'input#sel_0_5\\\']\'' 

> new Buffer(tt).toString(

... 'utf-8')

'\'[\\\'input#sel_0_1\\\',\\\'input#sel_0_3\\\',\\\'input#sel_0_5\\\']\''

> new Buffer(tt).toString()

'\'[\\\'input#sel_0_1\\\',\\\'input#sel_0_3\\\',\\\'input#sel_0_5\\\']\''

mysql.escape(new Buffer(row.element).toString("utf-8")); 

JSON.parse(eval(data.json));

// EITHER - accessing modules with <script> tags

var WaveSurfer = window.WaveSurfer;

var TimelinePlugin = window.WaveSurfer.timeline;

var MinimapPlugin = window.WaveSurfer.minimap;

// OR - importing as es6 module

import WaveSurfer from 'wavesurfer.js';

import TimelinePlugin from 'wavesurfer.js/dist/plugin/wavesurfer.timeline.min.js';

import MinimapPlugin from 'wavesurfer.js/dist/plugin/wavesurfer.minimap.min.js';

// OR - importing as require.js/commonjs modules

var WaveSurfer = require('wavesurfer.js');

var TimelinePlugin = require('wavesurfer.js/dist/plugin/wavesurfer.timeline.min.js');

var MinimapPlugin = require('wavesurfer.js/dist/plugin/wavesurfer.minimap.min.js');

// ... initialising waveform with plugins

var wavesurfer = WaveSurfer.create({

    container: '#waveform',

    waveColor: 'violet',

    plugins: [

        TimelinePlugin.create({

            container: '#wave-timeline'

        }),

        MinimapPlugin.create()

    ]

});