xexi

function textbraceTrim(text){
    let trimed = text;
    if(text !== null && text !== '') {
        let start_index = text.indexOf('(');
        let end_index = text.indexOf(')') + 1;
        trimed = text.substring(0, start_index) + text.substring(end_index, text.length);
        trimed = trimed.trim();
    }
    return trimed;
}

xexi

var korean = [ "다", "나", "가" ]; 

function ascending ( a , b ) {        
        return a.localeCompare ( b ); 
} 

function descending ( a , b ) { 
        return b.localeCompare ( a ); 
} 

xexi

About the WTFPL

WTFPL – Do What the Fuck You Want to Public License

Posted December 26th, 2012 by Sam Hocevar.

The Do What The Fuck You Want To Public License (WTFPL) is a free software license.

There is a long ongoing battle between GPL zealots and BSD fanatics, about which license type is the most free of the two. In fact, both license types have unacceptable obnoxious clauses (such as reproducing a huge disclaimer that is written in all caps) that severely restrain our freedoms. The WTFPL can solve this problem.

xexi

let bulk = db.collection('myCollection').initializeOrderedBulkOp();

  for(let i=0; i < arr.length; i++){
      bulk.find( {findData: arr[i]} ).upsert().updateOne(
          {
              $set: { modData: 'yolo' }
          }
      );
  }
  

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var arr = [];

// for any falsy value (0, "", NaN, null, undefined, or of course, false):

if (!myarray[0]){
  // isEmpty
} else {
  // notEmpty
}

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db.collection('myCollection').find( { 'findData': { $exists: true } }).toArray( (err, results) => {});

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db.collection.find({ "findData": "blabla" }).sort({"orderData": -1}).limit(1)

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var n = 5;
var nn = [n];
            for (var i = 1; i < 5; i++) {
                nn.push(nn[0] - i);
            }
console.log(JSON.stringify(nn));

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db.collection('my_collection').find( { 'findData': 'MorefindOption', 
                              $or : [ 
                                  { 'name' : { $regex: 'searchWord' , $options: 'ix' } }, 
                                  { 'adress' : { $regex: 'searchWord' , $options: 'ix' } } 
                              ] })
                              
                              
// more option available at google search -> mongodb regex option
// -> in mongo cli { name : /.*searchWord.*/i }

xexi

db.collection.aggregate( [
	{ $match: { 'dept': "service", 'condition': '0' } },
	{ $group: { _id: { first: "$distinct_col1", second: "$distinct_col1" },  // distinct option
		id_tag : { $min: "$tag" }, // projection
		count: { $sum:1 } // group count
	  }
	},
	{ $sort: { '_.id.regdate': 1 }}, // make sure sort by group id // 1 asc
	{ $skip: 0 },
	{ $limit: 5 },