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takeUntil.js
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takeUntil.js
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const takeUntil = function (array, callback) {
let result = [];
for (let item of array) {
if (callback(item)) {
break;
}
result.push(item);
}
return result;
};
//Test code
const eqArrays = function (arr1, arr2) {
// compare the length of arr1
const length1 = arr1.length;
const length2 = arr2.length;
if (length1 !== length2) {
return false;
// compare the item inside one by one
} else {
for (let i = 0; i < length1; i++) {
if (arr1[i] !== arr2[i]) {
return false;
}
}
return true;
}
};
const assertArraysEqual = function(actual, expected) {
if (eqArrays(actual, expected)) {
console.log(`✅✅✅ Assertion Passed: ${JSON.stringify(actual)} equals ${JSON.stringify(expected)}`);
} else {
// console.assert(actual === expected, `✅✅✅ ${actual} !== ${expected}`);
console.log(`🛑🛑🛑 Assertion failed: ${JSON.stringify(actual)} not equals ${JSON.stringify(expected)}`);
}
};
// Test case
// const data1 = [1, 2, 5, 7, 2, -1, 2, 4, 5];
// const results1 = takeUntil(data1, x => x < 0);
// console.log(results1);
// console.log('---');
// const data2 = ["I've", "been", "to", "Hollywood", ",", "I've", "been", "to", "Redwood"];
// const results2 = takeUntil(data2, x => x === ',');
// console.log(results2);
// assertArraysEqual(results1,[ 1, 2, 5, 7, 2 ]);
// assertArraysEqual(results2,[ "I've", 'been', 'to', 'Hollywood' ]);