Mixing
getting the total of a nested object property
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I have a an object as shown below, how can i get the total value of ca from each properties
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
sometimes the temp1 can consist of only one property as test1, so inorder to satisfy that case i thoguht of finding the first property of object. But when test2 test3 comes i can't use of 0. Also the property ca can exist or not.
temp1[Object.keys(temp1)[0]]
i have tried and i am getting the output , but can we improve this one
var arr =
Object.keys(temp1).forEach(o => {
Object.keys(temp1[o]).forEach(so => {
if(so === "ca"){
arr.push(temp1[o][so])
}
})
})
arr.reduce((a,b) => a + b)
expected output is
var total = 2
javascript
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
add a comment |
I have a an object as shown below, how can i get the total value of ca from each properties
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
sometimes the temp1 can consist of only one property as test1, so inorder to satisfy that case i thoguht of finding the first property of object. But when test2 test3 comes i can't use of 0. Also the property ca can exist or not.
temp1[Object.keys(temp1)[0]]
i have tried and i am getting the output , but can we improve this one
var arr =
Object.keys(temp1).forEach(o => {
Object.keys(temp1[o]).forEach(so => {
if(so === "ca"){
arr.push(temp1[o][so])
}
})
})
arr.reduce((a,b) => a + b)
expected output is
var total = 2
javascript
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
add a comment |
I have a an object as shown below, how can i get the total value of ca from each properties
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
sometimes the temp1 can consist of only one property as test1, so inorder to satisfy that case i thoguht of finding the first property of object. But when test2 test3 comes i can't use of 0. Also the property ca can exist or not.
temp1[Object.keys(temp1)[0]]
i have tried and i am getting the output , but can we improve this one
var arr =
Object.keys(temp1).forEach(o => {
Object.keys(temp1[o]).forEach(so => {
if(so === "ca"){
arr.push(temp1[o][so])
}
})
})
arr.reduce((a,b) => a + b)
expected output is
var total = 2
javascript
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
I have a an object as shown below, how can i get the total value of ca from each properties
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
sometimes the temp1 can consist of only one property as test1, so inorder to satisfy that case i thoguht of finding the first property of object. But when test2 test3 comes i can't use of 0. Also the property ca can exist or not.
temp1[Object.keys(temp1)[0]]
i have tried and i am getting the output , but can we improve this one
var arr =
Object.keys(temp1).forEach(o => {
Object.keys(temp1[o]).forEach(so => {
if(so === "ca"){
arr.push(temp1[o][so])
}
})
})
arr.reduce((a,b) => a + b)
expected output is
var total = 2
javascript
javascript
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
edited Jan 3 at 4:31
DILEEP THOMAS
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
asked Jan 3 at 4:21
DILEEP THOMASDILEEP THOMAS
1,1662616
1,1662616
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
You can reduce() over the Object.values(), you can catch the undefined ca with a short circuit like ca || 0 -- it will use ca if it's defined otherwise 0:
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
1
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
add a comment |
Iterate through the object and check if the key is present. If it is so then add the value to a variable
var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')answered Jan 3 at 4:27
brkbrk
29.9k32246
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can reduce() over the Object.values(), you can catch the undefined ca with a short circuit like ca || 0 -- it will use ca if it's defined otherwise 0:
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
1
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
add a comment |
You can reduce() over the Object.values(), you can catch the undefined ca with a short circuit like ca || 0 -- it will use ca if it's defined otherwise 0:
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
1
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
add a comment |
You can reduce() over the Object.values(), you can catch the undefined ca with a short circuit like ca || 0 -- it will use ca if it's defined otherwise 0:
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
You can reduce() over the Object.values(), you can catch the undefined ca with a short circuit like ca || 0 -- it will use ca if it's defined otherwise 0:
var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)var temp1 = {test1: {ca:1, ba:2, da: 3}, test2: {ca:1, ba:2, da: 3}, test3: { ba:2, da: 3}}
let sum = Object.values(temp1).reduce((sum,{ca}) => sum + (ca || 0), 0)
console.log(sum)answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
answered Jan 3 at 4:25
Mark MeyerMark Meyer
40.2k33464
40.2k33464
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
1
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
add a comment |
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
1
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
does it work if you add another deeper level?
– quirimmo
Jan 3 at 4:29
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
@quirimmo, not this just iterates over the values of the object. To go arbitrarily deeper would probably need to do some recursion.
– Mark Meyer
Jan 3 at 4:30
1
1
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
@MarkMeyer thanks for the single line code and for the quick response
– DILEEP THOMAS
Jan 3 at 4:33
add a comment |
Iterate through the object and check if the key is present. If it is so then add the value to a variable
var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')answered Jan 3 at 4:27
brkbrk
29.9k32246
add a comment |
Iterate through the object and check if the key is present. If it is so then add the value to a variable
var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')answered Jan 3 at 4:27
brkbrk
29.9k32246
add a comment |
Iterate through the object and check if the key is present. If it is so then add the value to a variable
var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')answered Jan 3 at 4:27
brkbrk
29.9k32246
Iterate through the object and check if the key is present. If it is so then add the value to a variable
var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')var temp1 = {
test1: {
ca: 1,
ba: 2,
da: 3
},
test2: {
ca: 1,
ba: 2,
da: 3
},
test3: {
ba: 2,
da: 3
}
}
function valueOfKeyToGet(key) {
let val = 0;
for (let keys in temp1) {
if (temp1[keys][key] !== undefined) {
val += temp1[keys][key];
}
}
console.log(val)
}
valueOfKeyToGet('ca')answered Jan 3 at 4:27
brkbrk
29.9k32246
answered Jan 3 at 4:27
brkbrk
29.9k32246
answered Jan 3 at 4:27
brkbrk
29.9k32246
answered Jan 3 at 4:27
brkbrk
29.9k32246
29.9k32246
add a comment |
add a comment |
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