The below script outputs
================================================
Log entry ID: 1
UUID: 2
Timestamp: 3
--------------------
Log entry ID: 4
UUID: 5
Timestamp: 6
which is what I want.
Right now description is hard coded, where I would like it to be built using arr instead.
My current thinking were to somehow generate the inner array in the map() function:
[
`Log entry ID: ${element['_id']}`,
`UUID: ${element['_source'].uuid}`,
`Timestamp: ${element['_source']['@timestamp']}\n`,
]
but because of the templating, this is not even a valid array with 3 elements, when looking at it on its own. So I am all out of ideas.
Question
Somehow I have to loop over the elements in arr before it is given to map(), I suppose.
Does anyone know how that could be done?
const dedent = require('dedent');
const arr = [
[ 'Log entry ID', '_id' ],
[ 'UUID', 'uuid' ],
[ 'Timestamp', '@timestamp' ],
]
;
const docs = [
{'_id': 1,'_source': {'uuid': 2,'@timestamp': 3}},
{'_id': 4,'_source': {'uuid': 5,'@timestamp': 6}},
];
const description = dedent`
================================================
${
docs.map((element) => [
`Log entry ID: ${element['_id']}`,
`UUID: ${element['_source'].uuid}`,
`Timestamp: ${element['_source']['@timestamp']}\n`,
].join('\n')).join('--------------------\n')
}
`;
console.log(description);
Update
I control arr so changing it to eg. is possible, or something else
const arr = [
[ 'Log entry ID', '_id' ],
[ 'UUID', {'_source': 'uuid'} ],
[ 'Timestamp', {'_source': '@timestamp'} ],
]
;
Since arr is in your control perhaps you can specify the path of the key itself.
const arr = [
['Log entry ID', '_id'],
['UUID', '_source.uuid'],
['Timestamp', '_source.@timestamp'],
['Description', '_source._desc']
];
const docs = [{
'_id': 1,
'_source': {
'uuid': 2,
'@timestamp': 3,
'_desc': 'test 1'
}
},
{
'_id': 4,
'_source': {
'uuid': 5,
'@timestamp': 6,
'_desc': 'test 2'
}
},
];
const getValue = (object, keys) => keys.split('.').reduce((o, k) => (o || {})[k], object);
console.log(docs.map((element) => arr.map((label) => {
return `${label[0]}: ${getValue(element, label[1])}`
}).join('\n')).join('\n--------------------\n'))Assuming that the keys of a docs array element are all unique, one could traverse the object looking for a matching key.
function findVal(object, key) {
var value;
Object.keys(object).some(function(k) {
if (k === key) {
value = object[k];
return true;
}
if (object[k] && typeof object[k] === 'object') {
value = findVal(object[k], key);
return value !== undefined;
}
});
return value;
}
docs.map((element) =>
arr.map(([item, key]) =>
`${item}: ${findVal(element, key)}`)
)
The FindVal is taken from here.
you could create a function to get data from arr and put in description
/* Simple Hello World in Node.js */
const arr = [
[ 'Log entry ID', '_id' ],
[ 'UUID', 'uuid' ],
[ 'Timestamp', '@timestamp' ],
]
;
const docs = [
{'_id': 1,'_source': {'uuid': 2,'@timestamp': 3}},
{'_id': 4,'_source': {'uuid': 5,'@timestamp': 6}},
];
const findInArr=function(value){
var t = ""
arr.forEach(item=>{
if (item.includes(value)) {t = item[0]}
})
return t
}
const description = dedent`
================================================
${
docs.map((element) => [
`${findInArr('_id')}: ${element['_id']}`,
`${findInArr('UUID')}: ${element['_source'].uuid}`,
`${findInArr('Timestamp')}: ${element['_source']['@timestamp']}\n`,
].join('\n')).join('--------------------\n')
}`;
console.log(description);