lodash.PrimitiveChain JavaScript and Node.js code examples

// remove
app.get("/delete", async (req, res) => {
 // to remove article
 // url     /delete?title=something
 //   const title = req.query.title;
 //   await db.get("articles").remove({ title: title }).write();
 //   res.status(200).send(`Your ${title} has been removed `);

 // to remove property
 // url    /delete
 db.unset("user.name").write();
 res.status(200).send("user.name has been removed");
});

/**
 * @param {}
 * @return {}
 * @api public
 */

var distance = function (vector) {
 var sum = _.chain(vector)
  .map(function (a) { return a*a })
  .reduce(function(total, n) { return total + n })
  .value()
 return mathjs.sqrt(sum)
}

_.chain(sentences)
  .map(function (sentence) {
   sentence['word_order_similarity'] = _.chain(sentences)
    .map(function (item) { return sim3(item['words'], sentence['words']) })
    .reduce(function(total, n) { return total + n })
    .value()
   return sentence
  })
  .value()

/*
  * 获取my app 个数
  */
 async getMyappNum() {
  const num = this.fileSyncInstance()
   .get('my_app')
   .size()
   .value();

  return num;
 }

cron.schedule('0  0  *  *  *', () => {
  getJSON('http://localhost', function(error, response){
    total_report = db.get('reports').size().value();
    total_profit = parseFloat(response.profit['USD'], 8);
    date = dateFormat(new Date(), "dd/mm/yyyy");
    
    saldo_USDT = parseFloat(response.balances['usdt'], 8);
    saldo_TUSD = parseFloat(response.balances['tusd'], 8);
    saldo_USDC = parseFloat(response.balances['usdc'], 8);
    saldo_PAX = parseFloat(response.balances['pax'], 8);
    saldo_USDS = parseFloat(response.balances['usds'], 8);
    saldo_USDSB = parseFloat(response.balances['usdsb'], 8);
    
    total_profit_percentage = response.profit['percent'].toFixed(2);
    total_profit_percentage = parseFloat(total_profit_percentage);
    
    last_result = db.get('reports').find({ id: (total_report - 1) }).value();
      
    profit_day = (total_profit - last_result.total_profit).toFixed(8);
    profit_day = Math.abs(profit_day);
    profit_day = parseFloat(profit_day);
      
    profit_day_percentage = ((total_profit_percentage - last_result.total_profit_percentage).toFixed(2));
    profit_day_percentage = Math.abs(profit_day_percentage);
    profit_day_percentage = parseFloat(profit_day_percentage);
    
    db.get('reports').push({ date: date, saldo_USDT: saldo_USDT, saldo_TUSD: saldo_TUSD, saldo_USDC: saldo_USDC, saldo_PAX: saldo_PAX, saldo_USDS: saldo_USDS, saldo_USDSB: saldo_USDSB, profit_day: profit_day, profit_day_percentage: profit_day_percentage, total_profit: total_profit, total_profit_percentage: total_profit_percentage, id: total_report}).write();
    db.update('id', n => n + 1).write();
  });
})

http.createServer((function(request,response)
{
  response.writeHead(200, {"Content-Type" : "text/html"});
  response.write('<html><head><meta charset="UTF-8"><title>Report Stable Coin</title></head>');
  response.write('<style> .tabelaum{ float: left; } .tabeladois{ float: left; margin-left: 6px;} h1 { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 24px; font-style: normal; font-variant: normal; font-weight: 700; line-height: 26.4px; } h3 { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 700; line-height: 15.4px; } p { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; line-height: 20px; } blockquote { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 21px; font-style: normal; font-variant: normal; font-weight: 400; line-height: 30px; } pre { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: 400; line-height: 18.5714px; } table { border-collapse: collapse;} th, td { text-align: left; padding: 6px;} tr:nth-child(even) {background-color: #f2f2f2;} td { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 10px; font-style: normal; font-variant: normal; font-weight: 400; line-height: 14px; } th { font-family: Tahoma, Verdana, Segoe, sans-serif; font-size: 10px; font-style: normal; font-variant: normal; font-weight: 400; line-height: 18.5714px; } </style>');
  response.write('</head><body><p>&nbsp;<h1 align="center"> Stable Coin - Report</h1></p> <table width="350" border="1" class="tabelaum"> <tr> <td colspan="2" align="center"><strong>Balances</strong></td> </tr>');
  var total_report = db.get('reports').size().value();
  var result_report = db.get('reports').find({ id: (total_report - 1) }).value();
  response.write('<tr> <td width="61">USDT</td><td width="208">&nbsp;'+result_report.saldo_USDT+'</td> </tr>');
  response.write('<tr> <td width="61">PAX</td><td width="208">&nbsp;'+result_report.saldo_PAX+'</td> </tr>');
  response.write('<tr> <td width="61">TUSD</td><td width="208">&nbsp;'+result_report.saldo_TUSD+'</td> </tr>');
  response.write('<tr> <td width="61">USDC</td><td width="208">&nbsp;'+result_report.saldo_USDC+'</td> </tr>');
  response.write('<tr> <td width="61">USDS</td><td width="208">&nbsp;'+result_report.saldo_USDS+'</td> </tr>');
  response.write('<tr> <td width="61">USDSB</td><td width="208">&nbsp;'+result_report.saldo_USDSB+'</td> </tr>');
  response.write('<tr> <td width="61"><strong>Initial Invest</strong></td><td width="208">&nbsp'+config.INITIAL_INVESTMENT+'</td>');
  response.write('<tr> <td width="61"><strong>Total:</strong></td><td>&nbsp;'+(result_report.saldo_USDT + result_report.saldo_PAX + result_report.saldo_TUSD + result_report.saldo_USDC +  result_report.saldo_USDS + result_report.saldo_USDSB) +'</td></tr></table>');
  response.write('<table width="872" border="1" class="tabeladois"><tr><td width="103"><strong>Date</strong></td><td width="152"><strong>Profit Today USD</strong></td><td width="198"><strong>% Today</strong></td><td width="194"><strong>Total Profit</strong></td><td width="195"><strong>Total %</strong></td></tr>');
  var result_report = db.get('reports').value();
  for (let index = 0; index < result_report.length; index++) {        
    response.write('<tr><td>&nbsp;'+result_report[index].date+'</td><td>&nbsp;'+result_report[index].profit_day+'</td><td>&nbsp;'+result_report[index].profit_day_percentage+'</td><td>&nbsp;'+result_report[index].total_profit+'</td><td>&nbsp;'+result_report[index].total_profit_percentage+'</td></tr>');
  }
  response.write('</table></body></html>');
  response.end("");
}))

if (!db.has('kv').value()) {
 db.set('kv', {}).write();
if (!db.has('my_app').value()) {
 db.set('my_app', []).write();
if (!db.has('app_update').value()) {
 db.set('app_update', []).write();
if (!admindb.has('user').value()) {
 admindb.set('user', [{
  "username": "admin",

/*
  * del安装APP的临时标识
  */
 async delInstallingAppFlag() {
  const key = LowdbKey.KV_APP_INSTALLING_FLAG;
  const res = this.fileSyncInstance()
   .unset(key)
   .write();

  return res;
 }

_.chain(coords)
        .map(({x, y}) => Math.abs(pX - x) + Math.abs(pY - y))
        .sum()
        .value()

/*
  * del更新APP的临时标识
  */
 async delUpdatingAppFlag() {
  const key = LowdbKey.KV_APP_UPDATING_FLAG;
  const res = this.fileSyncInstance()
   .unset(key)
   .write();

  return res;
 }

_.chain(sentences)
  .map(function (sentence) {
   sentence['word_semantic_similarity'] = _.chain(sentences)
    .map(function (item) { return sim2(item['words'], sentence['words']) })
    .reduce(function(total, n) { return total + n })
    .value()
   return sentence
  })
  .value()

/*
  * del安装APP的临时数据
  */
 async delMyInstallingApp(appid) {
  const key = LowdbKey.KV_APP_INSTALLING + appid;
  const res = this.fileSyncInstance()
   .unset(key)
   .write();

  return res;
 }

/*
  * 获取app update 个数
  */
 async getAppUpdateNum() {
  const num = this.fileSyncInstance()
   .get('app_update')
   .size()
   .value();

  return num;
 }

Most used lodash functions

LoDashStatic.map
Creates an array of values by running each element in collection through iteratee. The iteratee is
LoDashStatic.isEmpty
Checks if value is empty. A value is considered empty unless it’s an arguments object, array, string
LoDashStatic.forEach
Iterates over elements of collection invoking iteratee for each element. The iteratee is invoked wit
LoDashStatic.find
Iterates over elements of collection, returning the first element predicate returns truthy for.
LoDashStatic.pick
Creates an object composed of the picked `object` properties.

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How to usePrimitiveChain in lodash

Best JavaScript code snippets using lodash.PrimitiveChain(Showing top 13 results out of 315)

How to use
PrimitiveChain
in
lodash