为整个键数组分配2个值

Question

This might be the silly question but i want quick solution for this.

I have default colors array:

foreg : defColors = ['green', 'yellow'];

and I have another array of column

cols = ['lowest', 'low', 'medium', 'high', 'highest'];

I have the the values for first three items in cols array like this.

filler = ['lowest': 'darkred', 'low': 'red'];

And now i want to assign values to rest of value of cols array and make it look like this:

filler = [lowest: 'darkred', low: 'red', medium: 'green', high: 'yellow', highest: 'green']

This might be tricky but I want exactly like this, so if default colors has 2 items it assign its value in loop for all remaining items from col items.

Note: I also have an array for col items that doesn't have its value assigned like this:

remainingKeys = ['medium', 'high', 'highest'];

Answer 1

You can use Array#forEach to iterate over your remainingKeys and update the properties of the filler object (note that, since it is not an array, it should be enclosed in curly brackets rather than square ones). The remainder operator ( % ) is useful here for selecting a color from your defColors array in a repeating pattern.

 var defColors = ['green', 'yellow'] var cols = ['lowest', 'low', 'medium', 'high', 'highest'] var filler = {'lowest': 'darkred', 'low': 'red'} var remainingKeys = ['medium', 'high', 'highest']; remainingKeys.forEach(function (key, i) { this[key] = defColors[i % defColors.length] }, filler) console.log(filler) 

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