Why does map() get 2 arguments in this case?
Could you help me, please, I can't understand why there are 2 arguments in the map()
Children.map(this.props.children, child =>
<button>{child} </button>
I supposed that this construction should work
Children.map(child =>
<button>{child} </button>
But it doesn't.
javascript reactjs dictionary children
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
add a comment |
Could you help me, please, I can't understand why there are 2 arguments in the map()
Children.map(this.props.children, child =>
<button>{child} </button>
I supposed that this construction should work
Children.map(child =>
<button>{child} </button>
But it doesn't.
javascript reactjs dictionary children
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
1
That syntax doesn't look valid. More than one argument requires parentheses.
– CertainPerformance
Nov 15 '18 at 12:33
1
Is this usingReact.Children? Don't confuse it with the array methodmap.
– Tholle
Nov 15 '18 at 12:34
2
first argument is what to map over and second is the mapping function
– ashish singh
Nov 15 '18 at 12:35
Yeah, that React.Children
– Roman Tselenko
Nov 15 '18 at 12:35
add a comment |
Could you help me, please, I can't understand why there are 2 arguments in the map()
Children.map(this.props.children, child =>
<button>{child} </button>
I supposed that this construction should work
Children.map(child =>
<button>{child} </button>
But it doesn't.
javascript reactjs dictionary children
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
Could you help me, please, I can't understand why there are 2 arguments in the map()
Children.map(this.props.children, child =>
<button>{child} </button>
I supposed that this construction should work
Children.map(child =>
<button>{child} </button>
But it doesn't.
javascript reactjs dictionary children
javascript reactjs dictionary children
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
edited Nov 15 '18 at 12:36
Roman Tselenko
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
asked Nov 15 '18 at 12:32
Roman TselenkoRoman Tselenko
386
386
1
That syntax doesn't look valid. More than one argument requires parentheses.
– CertainPerformance
Nov 15 '18 at 12:33
1
Is this usingReact.Children? Don't confuse it with the array methodmap.
– Tholle
Nov 15 '18 at 12:34
2
first argument is what to map over and second is the mapping function
– ashish singh
Nov 15 '18 at 12:35
Yeah, that React.Children
– Roman Tselenko
Nov 15 '18 at 12:35
add a comment |
1
That syntax doesn't look valid. More than one argument requires parentheses.
– CertainPerformance
Nov 15 '18 at 12:33
1
Is this usingReact.Children? Don't confuse it with the array methodmap.
– Tholle
Nov 15 '18 at 12:34
2
first argument is what to map over and second is the mapping function
– ashish singh
Nov 15 '18 at 12:35
Yeah, that React.Children
– Roman Tselenko
Nov 15 '18 at 12:35
1
1
That syntax doesn't look valid. More than one argument requires parentheses.
– CertainPerformance
Nov 15 '18 at 12:33
That syntax doesn't look valid. More than one argument requires parentheses.
– CertainPerformance
Nov 15 '18 at 12:33
1
1
Is this using
React.Children? Don't confuse it with the array method map.– Tholle
Nov 15 '18 at 12:34
Is this using
React.Children? Don't confuse it with the array method map.– Tholle
Nov 15 '18 at 12:34
2
2
first argument is what to map over and second is the mapping function
– ashish singh
Nov 15 '18 at 12:35
first argument is what to map over and second is the mapping function
– ashish singh
Nov 15 '18 at 12:35
Yeah, that React.Children
– Roman Tselenko
Nov 15 '18 at 12:35
Yeah, that React.Children
– Roman Tselenko
Nov 15 '18 at 12:35
add a comment |
1 Answer
1
active
oldest
votes
React.Children map API takes the first argument as the children array to iterate on and the second argument as the callback function that is called with each of the iterated children
Unlike the normal map which is the prototype of the Array constructor function, in the above case map is a function defined for the Children Object and needs to be passed with the array it has to iterate on
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
React.Children map API takes the first argument as the children array to iterate on and the second argument as the callback function that is called with each of the iterated children
Unlike the normal map which is the prototype of the Array constructor function, in the above case map is a function defined for the Children Object and needs to be passed with the array it has to iterate on
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
add a comment |
React.Children map API takes the first argument as the children array to iterate on and the second argument as the callback function that is called with each of the iterated children
Unlike the normal map which is the prototype of the Array constructor function, in the above case map is a function defined for the Children Object and needs to be passed with the array it has to iterate on
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
add a comment |
React.Children map API takes the first argument as the children array to iterate on and the second argument as the callback function that is called with each of the iterated children
Unlike the normal map which is the prototype of the Array constructor function, in the above case map is a function defined for the Children Object and needs to be passed with the array it has to iterate on
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
React.Children map API takes the first argument as the children array to iterate on and the second argument as the callback function that is called with each of the iterated children
Unlike the normal map which is the prototype of the Array constructor function, in the above case map is a function defined for the Children Object and needs to be passed with the array it has to iterate on
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
answered Nov 15 '18 at 12:35
Shubham KhatriShubham Khatri
89.9k15111149
89.9k15111149
add a comment |
add a comment |
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1
That syntax doesn't look valid. More than one argument requires parentheses.
– CertainPerformance
Nov 15 '18 at 12:33
1
Is this using
React.Children? Don't confuse it with the array methodmap.– Tholle
Nov 15 '18 at 12:34
2
first argument is what to map over and second is the mapping function
– ashish singh
Nov 15 '18 at 12:35
Yeah, that React.Children
– Roman Tselenko
Nov 15 '18 at 12:35