Iterate over an array of objects with object having multiple properties
I'm trying to iterate over the following:
state = {
products : [
{
x : "sd",
y : "fdg"
}, {
x : "sdx",
y : "fdgx"
}
]
}
I need to iterate over the above products array and inside object to create:
<tr><td>sd</td><td>fdg</td></tr>
I tried using :
{
this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
})
}
but get multiple errors and prod being undefined.
javascript reactjs
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
asked Nov 21 '18 at 1:50
the_legend_27
33119
add a comment |
I'm trying to iterate over the following:
state = {
products : [
{
x : "sd",
y : "fdg"
}, {
x : "sdx",
y : "fdgx"
}
]
}
I need to iterate over the above products array and inside object to create:
<tr><td>sd</td><td>fdg</td></tr>
I tried using :
{
this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
})
}
but get multiple errors and prod being undefined.
javascript reactjs
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
asked Nov 21 '18 at 1:50
the_legend_27
33119
1
@CertainPerformance updated code
– the_legend_27
Nov 21 '18 at 1:55
add a comment |
I'm trying to iterate over the following:
state = {
products : [
{
x : "sd",
y : "fdg"
}, {
x : "sdx",
y : "fdgx"
}
]
}
I need to iterate over the above products array and inside object to create:
<tr><td>sd</td><td>fdg</td></tr>
I tried using :
{
this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
})
}
but get multiple errors and prod being undefined.
javascript reactjs
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
asked Nov 21 '18 at 1:50
the_legend_27
33119
I'm trying to iterate over the following:
state = {
products : [
{
x : "sd",
y : "fdg"
}, {
x : "sdx",
y : "fdgx"
}
]
}
I need to iterate over the above products array and inside object to create:
<tr><td>sd</td><td>fdg</td></tr>
I tried using :
{
this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
})
}
but get multiple errors and prod being undefined.
javascript reactjs
javascript reactjs
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
asked Nov 21 '18 at 1:50
the_legend_27
33119
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
asked Nov 21 '18 at 1:50
the_legend_27
33119
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
edited Nov 21 '18 at 2:02
Dacre Denny
10.5k4929
10.5k4929
asked Nov 21 '18 at 1:50
the_legend_27
33119
asked Nov 21 '18 at 1:50
the_legend_27
33119
asked Nov 21 '18 at 1:50
the_legend_27
33119
33119
1
@CertainPerformance updated code
– the_legend_27
Nov 21 '18 at 1:55
add a comment |
1
@CertainPerformance updated code
– the_legend_27
Nov 21 '18 at 1:55
1
1
@CertainPerformance updated code
– the_legend_27
Nov 21 '18 at 1:55
@CertainPerformance updated code
– the_legend_27
Nov 21 '18 at 1:55
add a comment |
3 Answers
3
active
oldest
votes
It's possible that logic elsewhere in your component is mutating the state, which in turn may be the root cause of the error thrown during rendering.
Be sure to check that the products array is consistently defined in your components state, and that the items in that array are defined.
One solution here might be to take a more defensive approach to rendering your table row elements, by doing the following:
{
Array.isArray(this.state.products) && this.state.products
.filter(product => !!product)
.map(product => {
return <tr><td>{product.x}</td><td>{product.y}</td></tr>;
})
}
Here, the rendering logic asserts that this.state.products is the expected array type via Array.isArray(). Addtionally, the logic ensures any prop being rendered is defined by first filtering out any undefined prop items via this line:
filter(product => !!product)
Hope that helps!
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
add a comment |
The problem is that the return statement is an HTML code which is causing the problem whereas you can encode the code into a string and the DOM will treat it as HTML code
this.state.products.map(function(prod){ return "<tr><td>"+prod.x+"</td><td>"+prod.y +"</td> </tr>" }).
answered Nov 21 '18 at 6:00
Advait
215
add a comment |
you need to add that in one variable return as below:
const prod = this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
});
Use the variable inside render lifecycle as below.
{prod}
Here is the working code attached in jsFiddle
Hope this helps!
answered Nov 21 '18 at 6:42
varit05
1,630715
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
It's possible that logic elsewhere in your component is mutating the state, which in turn may be the root cause of the error thrown during rendering.
Be sure to check that the products array is consistently defined in your components state, and that the items in that array are defined.
One solution here might be to take a more defensive approach to rendering your table row elements, by doing the following:
{
Array.isArray(this.state.products) && this.state.products
.filter(product => !!product)
.map(product => {
return <tr><td>{product.x}</td><td>{product.y}</td></tr>;
})
}
Here, the rendering logic asserts that this.state.products is the expected array type via Array.isArray(). Addtionally, the logic ensures any prop being rendered is defined by first filtering out any undefined prop items via this line:
filter(product => !!product)
Hope that helps!
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
add a comment |
It's possible that logic elsewhere in your component is mutating the state, which in turn may be the root cause of the error thrown during rendering.
Be sure to check that the products array is consistently defined in your components state, and that the items in that array are defined.
One solution here might be to take a more defensive approach to rendering your table row elements, by doing the following:
{
Array.isArray(this.state.products) && this.state.products
.filter(product => !!product)
.map(product => {
return <tr><td>{product.x}</td><td>{product.y}</td></tr>;
})
}
Here, the rendering logic asserts that this.state.products is the expected array type via Array.isArray(). Addtionally, the logic ensures any prop being rendered is defined by first filtering out any undefined prop items via this line:
filter(product => !!product)
Hope that helps!
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
add a comment |
It's possible that logic elsewhere in your component is mutating the state, which in turn may be the root cause of the error thrown during rendering.
Be sure to check that the products array is consistently defined in your components state, and that the items in that array are defined.
One solution here might be to take a more defensive approach to rendering your table row elements, by doing the following:
{
Array.isArray(this.state.products) && this.state.products
.filter(product => !!product)
.map(product => {
return <tr><td>{product.x}</td><td>{product.y}</td></tr>;
})
}
Here, the rendering logic asserts that this.state.products is the expected array type via Array.isArray(). Addtionally, the logic ensures any prop being rendered is defined by first filtering out any undefined prop items via this line:
filter(product => !!product)
Hope that helps!
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
It's possible that logic elsewhere in your component is mutating the state, which in turn may be the root cause of the error thrown during rendering.
Be sure to check that the products array is consistently defined in your components state, and that the items in that array are defined.
One solution here might be to take a more defensive approach to rendering your table row elements, by doing the following:
{
Array.isArray(this.state.products) && this.state.products
.filter(product => !!product)
.map(product => {
return <tr><td>{product.x}</td><td>{product.y}</td></tr>;
})
}
Here, the rendering logic asserts that this.state.products is the expected array type via Array.isArray(). Addtionally, the logic ensures any prop being rendered is defined by first filtering out any undefined prop items via this line:
filter(product => !!product)
Hope that helps!
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
edited Nov 21 '18 at 2:32
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
answered Nov 21 '18 at 2:09
Dacre Denny
10.5k4929
10.5k4929
add a comment |
add a comment |
The problem is that the return statement is an HTML code which is causing the problem whereas you can encode the code into a string and the DOM will treat it as HTML code
this.state.products.map(function(prod){ return "<tr><td>"+prod.x+"</td><td>"+prod.y +"</td> </tr>" }).
answered Nov 21 '18 at 6:00
Advait
215
add a comment |
The problem is that the return statement is an HTML code which is causing the problem whereas you can encode the code into a string and the DOM will treat it as HTML code
this.state.products.map(function(prod){ return "<tr><td>"+prod.x+"</td><td>"+prod.y +"</td> </tr>" }).
answered Nov 21 '18 at 6:00
Advait
215
add a comment |
The problem is that the return statement is an HTML code which is causing the problem whereas you can encode the code into a string and the DOM will treat it as HTML code
this.state.products.map(function(prod){ return "<tr><td>"+prod.x+"</td><td>"+prod.y +"</td> </tr>" }).
answered Nov 21 '18 at 6:00
Advait
215
The problem is that the return statement is an HTML code which is causing the problem whereas you can encode the code into a string and the DOM will treat it as HTML code
this.state.products.map(function(prod){ return "<tr><td>"+prod.x+"</td><td>"+prod.y +"</td> </tr>" }).
answered Nov 21 '18 at 6:00
Advait
215
answered Nov 21 '18 at 6:00
Advait
215
answered Nov 21 '18 at 6:00
Advait
215
answered Nov 21 '18 at 6:00
Advait
215
215
add a comment |
add a comment |
you need to add that in one variable return as below:
const prod = this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
});
Use the variable inside render lifecycle as below.
{prod}
Here is the working code attached in jsFiddle
Hope this helps!
answered Nov 21 '18 at 6:42
varit05
1,630715
add a comment |
you need to add that in one variable return as below:
const prod = this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
});
Use the variable inside render lifecycle as below.
{prod}
Here is the working code attached in jsFiddle
Hope this helps!
answered Nov 21 '18 at 6:42
varit05
1,630715
add a comment |
you need to add that in one variable return as below:
const prod = this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
});
Use the variable inside render lifecycle as below.
{prod}
Here is the working code attached in jsFiddle
Hope this helps!
answered Nov 21 '18 at 6:42
varit05
1,630715
you need to add that in one variable return as below:
const prod = this.state.products.map(function(prod) {
return <tr><td>{prod.x}</td><td>{prod.y}</td></tr>;
});
Use the variable inside render lifecycle as below.
{prod}
Here is the working code attached in jsFiddle
Hope this helps!
answered Nov 21 '18 at 6:42
varit05
1,630715
answered Nov 21 '18 at 6:42
varit05
1,630715
answered Nov 21 '18 at 6:42
varit05
1,630715
answered Nov 21 '18 at 6:42
varit05
1,630715
1,630715
add a comment |
add a comment |
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1
@CertainPerformance updated code
– the_legend_27
Nov 21 '18 at 1:55