CODEWITHSUNDEEP
goslice
Nicky Feller
Nicky Feller

Reputation: 3889

Is it possible to initialize slice with specific values?

Is it possible to initialize an slice with all 1's like in python?

PYTHON:

onesArray = np.ones(5)
onesList = [1]*5

GOLANG

onesSlice := make([]int, 5)
for i:= 0; i < len(onesSlice); i++{
    onesSlice[i] = 1
}

Is it possible to do better than this?

Upvotes: 96

Views: 137824

Answers (2)

y0prst
y0prst

Reputation: 790

Starting with Go 1.23 (released in August 2024), there is a function slices.Repeat for that:

onesArray := slices.Repeat([]int{1}, 5)

Thanks to Adam Jones' proposal.

Upvotes: 14

evanmcdonnal
evanmcdonnal

Reputation: 48076

Yes but you have to use a different syntax.

oneSlice := []int{1, 1, 1, 1, 1}

It's referred to as 'composite literal'

Also, if there is reason to iterate (like calculating the values based loop variable or something) then you could use the range keyword rather than the old school for i is equal to, i is less than, i++ loop.

for i := range onesSlice {
    onesSlice[i] = 1
}

Upvotes: 130

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