What is the most elegant way to check if all values in a boolean array are true?
public static boolean areAllTrue(boolean[] array)
{
for(boolean b : array) if(!b) return false;
return true;
}
Check if all values in array are true, then return a true boolean statement (javascript)
You can use .every()
method:
let arr1 = [false, true, true], arr2 = [true, true, true];
let checker = arr => arr.every(v => v === true);
console.log(checker(arr1));console.log(checker(arr2));
What is the most elegant way to check if all values in a vector<bool> are true?
If you want to use std::all_of
, then just return the value in the predicate function :
#include <vector>
#include <iostream>
#include <algorithm>
int main()
{
std::vector< bool > v( 30, true );
const bool all = std::all_of( std::begin(v)+10, std::begin(v)+20, []( const bool v){ return v; } );
std::cout << all << std::endl;
}
How do I create an boolean array and check if all boolean are true and then execute smth
You can loop elements and store its result in a variable as shown below:-
boolean isTrue = false;
for (boolean bool : tubes) {
isTrue = bool;
if (!isTrue) {
break;
}
}
if (isTrue) {
// print...
}
Another solution
boolean isTrue = true;
for (boolean bool : tubes) {
isTrue &= bool;
}
if (isTrue) {
// print...
}
How to check if all values in bool array are true?
If the following loop goes through the entire array without finding a false
entry, then at the end of the loop i
will equal value
for(i = 0; i < value; i++)
if ( !bool_table[i] )
break;
table_true = (i == value);
Checking if all entries in a 2d Boolean array are true/false using a method in Java?
Usually the logic like you have should be in this form:
loop{
if (negative_condition) return false;
}
return true;
Notice that return true
is outside of the loop.
In your case you have nested loop which should looks like this:
loop{
loop{
if (negative_condition) return false;
}
}
return true;
Looking at the above pseudo code, your Java code should look like this:
for (int i = 0; i < lightArray.length; i++){
for(int j = 0; j <lightArray[0].length; j++) {
if (lightArray[i][j] == true) return false;
}
}
return true;
How to check ALL elements of a boolean array are true
Using the enhanced for loop, you can easily iterate over an array, no need for indexes and size calculations:
private static boolean allTrue (boolean[] values) {
for (boolean value : values) {
if (!value)
return false;
}
return true;
}
Test all values in a boolean[]
Use Guava:
As pointed out by SotiriosDelimanolis
// verify all values are true
boolean result = !Booleans.contains(myArray, false);
Old post...
boolean result = Iterables.all(
Booleans.asList(myArray),
Predicates.equalTo(true));
Using statics it becomes:
boolean result = all(asList(myArray),
equalTo(true));
Another options is using Sets
boolean result = Sets.newHashSet(Booleans.asList(myArray)).contains(true);
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