I am doing check on three different variables which are holding array of strings like below.
var a = ["ghi",dwe"]
var b = ["ghsj"]
var c = ["gdjr"]
var result; // result array
I am checking each time if variable a,b,c are not undefined and if they are holding some value I am simply pushing a string for each variable in the result array.
Below is line of code for same.
if(a !== undefined && a.length > 0) {
result.push("Astring");
}
if(b !== undefined && b.length > 0) {
result.push("Bstring");
}
if(c!== undefined && c.length > 0) {
result.push("Cstring");
}
Expected Result should be if the var a,b,c are defined and non empty then result array variable should hold value like below
["Astring","BString","CString"]
Is there a more efficient way of describing this code.Here I am just checking each and every variable using if condition. Also , I am restricted in some ways as I am using a Rhino js engine ver 1.7.12.
You could create an object with your initial data. Then iterate over it, and append the key (e.g. a, b or c) if it matches your condition.
Here's a quick demo:
// Initial Data
const a = ['ghi', 'dwe'];
const b = ['ghsj'];
const c = ['gdjr'];
// Store intial within an array
const abc = {a, b, c};
const result = [];
// Append each data item that present, is array, and not empty
Object.keys(abc).forEach((letterKey) => {
const content = abc[letterKey];
if(Array.isArray(content) && content.length > 0) {
result.push(letterKey);
}
});
// Print results
console.log(result);I'd use an object instead of an array, so that the result-elements can be specified.
var a = ["ghi","dwe"]
var b = ["ghsj"]
var c = ["gdjr"]
mapping = {
"AString": a,
"BString": b,
"CString": c
}
var result = []; // result array
for (let [key, value] of Object.entries(mapping)) {
if (value !== undefined && value.length > 0) {
result.push(key)
}
}
console.log(result)first you will store the 3 variables in a list then you loop over them with map
var a = ["ghi","dwe"]
var b = ["ghsj"]
var c = ["gdjr"]
var result = [];
let list = [a,b,c]
list.map(item => {
if(item !== undefined && a.length > 0) {
result.push(item)
}
})