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https://blog.risingstack.com/node-hero-async-programming-in-node-js/?utm_source=RisingStack+Engineering&utm_campaign=e6889383bf-Node_Hero_34_5_2016&utm_medium=email&utm_term=0_02a6a69990-e6889383bf-321048393

javascript recursive example

window.s='';
window.record = {};
function f(o, parentKey){
  for(var k in o){
    if(!o.hasOwnProperty(k)){continue;}
    var suffix = record[k] ? (record[k]+'') : '';
    var k_and_suffix = k+suffix;
     window.s+="r.db('work_genius').table('assignment_categories').insert({id:'"+k_and_suffix+"',name:'"+k+"',parentId:'"+parentKey+"'});" + "\r\n";
    if (record.hasOwnProperty(k)){
      record[k]++;
    } else {
      record[k] = 1;
    }
    if(typeof o[k]==='object'){
      f(o[k], k_and_suffix);
    }
  }
}
f(o, 'root');
console.log(s);

C# 編譯失敗：錯誤 1 Files 有無效的值 "U��R1}3ŉE�SVW�u�}쥥��٥��M��{ �u쥥��_^� "0}�C�"0}��3�[�o

發生在舊projects(private repo)

Console顯示:

錯誤 1 Files 有無效的值 "U��R1}3ŉE�SVW�u��}쥥��٥��M��{ �u쥥��_^�� "0}�C��"0}��3�[�o
沒有行數。。。

解法:

打開 YOUR_PROJECT.exe.manifest YOUR_PROJECT.exe.config 到 Notepad++ ，並convert to UTF-8 without BOM
↓
saving files
↓
重編成功!

[SOLVED] ./crontab_start_diff.sh: 1: ./crontab_start_diff.sh: /usr/lib/python2.7: Permission denied

change to /usr/bin/python

https://medium.com/@Rich_Harris/small-modules-it-s-not-quite-that-simple-3ca532d65de4#.cpfhb987q

[WorkAround] go to the topest(oldest) message at one of slack channel

var t = setInterval(function(){
  try{document.querySelectorAll('.ts_icon_chevron_circle_right')[0].click();}
  catch(e){clearInterval(t);}
}, 800);

[SOLVED] npm install tarball.destroy is not a function

If your Temp folder on window is full,
please remove some files for more space so that you can npm install -g XXXXX

rethinkdb command

r.db('mydb').tableList()
r.db('mydb').tableCreate('mytbl')
r.db('mydb').table('mytbl')
r.db('mydb').table('mytbl').delete()
r.db('mydb').table('mytbl').get(1).delete()

will raise an error

r.db('mydb').table('mytbl').insert() // empty insert
r.db('mydb').table('not_existed_tbl') // wrong table name

rethinkDB 取 createdAt!=1466053870000

r.db('work_genius').table('tbl').filter(r.row('createdAt').eq(1466053870000).not())

rethinkDB hasFields

r.db('DB').table('TABLE').filter(function (doc) {
    return doc.hasFields('FIELD');
})

r.db('work_genius').table('REPORTS_TBL_NAME')
//.filter({isSuccess:false})
.filter({'createdAt':1466585510000}).delete()
//.filter({'createdAt':1466053870000})
//.filter(r.row('createdAt').eq(1466053870000).not()).filter(r.row('errorMessage').eq('').not())

execSync

var execSync = require('child_process').execSync

console.log(execSync('cat execSync.js', {encoding:'utf8'}));
console.log(__dirname);

saga guessing

function* fetchProducts(dispatch)
  const products = yield call(Api.fetch, '/products')
  dispatch({ type: 'PRODUCTS_RECEIVED', products })
}

↓

a = fetchProducts(dispatch)
b = a.next() // Promise
b.then && b.then(products => {
  a.next(products)
})
//dispatch({type:'PRODUCTS_RECEIVED', products})

sudo chown -R "${USER:-$(id -un)}" .

http://stackoverflow.com/questions/2642836/git-error-unable-to-append-to-git-logs-refs-remotes-origin-master-permission

RethinkDB 跟 MySQL REPLACE 類似的執行語法

栗子如下

r.db('mydb').table('mytable').insert({"id":123456});
r.db('mydb').table('mytable').get(123456).update({"syncfield1":"value1", "syncfield2":"value2"});

存在則 update；不存在則 insert。