How to Efficiently Initialize a Boolean Array in Go Without a For Loop?

Efficient Array Initialization without a For Loop in Go

For initializing an array of boolean values with true values, a for loop is typically the most straightforward approach. However, there are alternative methods that can be more efficient in certain scenarios.

One strategy is to leverage the fact that a newly created array or slice in Go is initialized with zero values. For boolean arrays, this means all elements will be false. By creating an array of the desired size, you can effectively initialize all elements to true by simply assigning the array elements as follows:

<code class="go">const n = 100
b := make([]bool, n)</code>

Another option is to utilize the composite literal syntax. While this is not significantly shorter than using a for loop, it can provide a more compact representation:

<code class="go">b1 := []bool{true, true, true}
b2 := [3]bool{true, true, true}</code>

If the array size is large, using a for loop remains the simplest and most efficient solution. However, you can consider rethinking the logic of your application. For instance, if the array represents files that are currently present, you could instead use the slice to store whether files are missing. This way, the default zero value of false would indicate that a file is present:

<code class="go">present := make([]bool, n)</code>

Finally, note that for more efficient array initialization, you can refer to the question "Is there an analog of memset in Go?" for potential solutions.

The above is the detailed content of How to Efficiently Initialize a Boolean Array in Go Without a For Loop?. For more information, please follow other related articles on the PHP Chinese website!