구차니의 잡동사니 모음

$(window).on("beforeunload", function() { 

    return confirm("Do you really want to close?"); 

}) 

//onBeforeUnload 이벤트 지정

$(window).bind('beforeunload', function()

{

    //페이지 변경이 있었는지 체크..

    var isChanged = ....; 

    //출력할 내용을 Return 해주면 확인 창이 뜨게 됩니다.

    if(isChanged) 

        return '변경된 사항이 있습니다. 페이지에서 나가시겠습니까?';<br>

    //확인 창을 띄우지 않으려면 아무 내용도 Return 하지 마세요!! (Null조차도)

};

//Form Submit 등 onBeforeUnload Event가 발생하길 원하지 않는 경우, 이벤트 해제

$('form').submit(function() 

{

    $(window).unbind('beforeunload'); 

}); 

Cannot enlarge memory arrays. Either (1) compile with  -s TOTAL_MEMORY=X  with X higher than the current value 16777216, (2) compile with  -s ALLOW_MEMORY_GROWTH=1  which allows increasing the size at runtime but prevents some optimizations, (3) set Module.TOTAL_MEMORY to a higher value before the program runs, or (4) if you want malloc to return NULL (0) instead of this abort, compile with  -s ABORTING_MALLOC=0 

$ 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));