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howtomakeaturn/fp.js

Created April 12, 2019 06:22
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  1. howtomakeaturn created this gist Apr 12, 2019.
    18 changes: 18 additions & 0 deletions fp.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,18 @@
    changeOptionValue(optionIndex, valueIndex, newValue) {
    const state = this.state;

    const newState = {
    ...state,
    options: state.options.map((option, i) =>
    i === optionIndex ?
    { ...option, values: option.values.map((value, ii) =>
    ii === valueIndex ?
    newValue : value
    )
    } :
    option
    )
    };

    this.setState(newState)
    }