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takeUntil.js
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takeUntil.js
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const eqArrays = function(arr1, arr2) {
if (arr1.length === arr2.length) {
for (let i = 0; i < arr1.length; i++) {
if (arr1[i] !== arr2[i]) {
return false;
}
} return true;
} else {
return false;
}
};
const assertArraysEqual = function(actual, expected) {
const isItEqual = eqArrays(actual,expected);
if (isItEqual) {
console.log(`🥳🥳🥳 Assertion Passed: ${actual} === ${expected}`);
} else {
console.log(`❌❌❌ Assertion Failed: ${actual} !== ${expected}`);
}
};
const takeUntil = function(array, callback) {
const newArray = [];
for (const item of array) {
if (callback(item)) {
// Stop collecting items when the callback returns a truthy value
break;
}
newArray.push(item);
}
return newArray;
};
///Tests
const data1 = [1, 2, 5, 7, 2, -1, 2, 4, 5];
const results1 = takeUntil(data1, x => x < 0);
console.log(results1);
assertArraysEqual(results1, [ 1, 2, 5, 7, 2 ]);
console.log('---');
const data2 = ["I've", "been", "to", "Hollywood", ",", "I've", "been", "to", "Redwood"];
const results2 = takeUntil(data2, x => x === ',');
console.log(results2);
assertArraysEqual(results2, [ "I've", 'been', 'to', 'Hollywood' ]);