The array is this:
[{name:'name1',id:'id1',val:'001},
...
{name:'name10',id:'id10',val:'010}]
We want to store in the database as a long text string:
name1,id1,001;...;name10,id10,010
values separated by semicolon and comma.
Is there any convenient join or something else to achieve it? (I guess there must be something better than for loop.)
function joinValues(arr, j1, j2) {
return arr.map(function(o) {
return Object.keys(o).map(function(k) {
return o[k];
}).join(j1)
}).join(j2);
}
var obj = [{a:1,b:2},{a:'x',b:'y'}];
joinValues(obj, ',', ';'); // => "1,2;x,y"
array.map(function(o){
var values = Object.keys(o).map(function(key){
return o[key];
});
return values.join(',');
}).reduce(function(a,b){
return a + ';' + b;
});
Beware there might be compat issues depending on your platform (map, reduce, Object.keys not available everywhere yet!)
Also, take into account that properties order in regular objects is not guaranteed. With this approach, theoretically you could end up having name1,id1,001;...;id10,name10,010. That might be an issue when mapping the string back to objects.
I'm afraid there isn't a built-in language feature for that, but if you can use ES6, it can look quite elegant
Object.values = obj => Object.keys(obj).map(key => obj[key]);
// so to convert your data
data.map(o => Object.values(o).join(',')).join(';');
join, and won't get deterministic order unless you are explicit.