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Find Occurrences

kouqhar answered on November 15, 2024 Popularity 1/10 Helpfulness 1/10

answer Find Occurrences

related react-i18next:: You will need to pass in an i18next instance by using initReactI18next

Find Occurrences

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/* METHOD ONE */
  const methodOne = (n, t) => n.filter((num) => num === t).length;

/* METHOD TWO */
  const methodTwo = (n, t) => {
    const halfValue = Math.floor(n.length / 2);
    let [leftArr, rightArr, count] = [
      n.slice(0, halfValue),
      n.slice(halfValue),
      0,
    ];
    
    const maxArr = Math.max(leftArr.length, rightArr.length);
    for (let i = 0; i < maxArr; i++) {
      // First sliced arr (left)
      leftArr[i] === t ? count++ : null;

      // Second sliced arr (right)
      rightArr[i] === t ? count++ : null;
    }

    return count;
  };

/* METHOD THREE */
  const methodThree = (n, t) => {
    let [left, right, count] = [0, n.length, 0];

    // The loop takes half the time (n.length / 2)
    for (let i = 0; i < n.length / 2; i++) {
      if (right === left) {
        if (right === t) count++;
        break;
      } else {
        if (n[left] === t) count++;
        if (n[right] === t) count++;
      }

      left++;
      right--;
    }

    return count;
  };

/* METHOD FOUR */
  // Similar to "MethodThree", but with a while loop
  // Two pointer solutions
  // But less checks
  const methodFour = (n, t) => {
    let [left, right, count] = [0, n.length, 0];

    // The logic for the condition has to right
    // else you may run into some errors
    while (left < right) {
      if (n[left] === t) count++;
      if (n[right] === t) count++;

      left++;
      right--;
    }

    return count;
  };

  //  Variables
  const numbers = [
    1, 2, 4, 3, 5, 3, 5, 5, 2, 2, 2, 1, 4, 4, 2, 3, 1, 5, 5, 3, 5, 4, 1, 5, 4, 
    2, 5, 3,
  ];
  const target = 5;

  const mthOne = methodOne(numbers, target);
  const mthTwo = methodTwo(numbers, target);
  const mthThree = methodThree(numbers, target);
  const mthFour = methodFour(numbers, target);

  console.log("Method four ", mthFour);

// With love @kouqhar

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: find-occurrences javascript

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Contributed on Nov 15 2024

kouqhar

0 Answers Avg Quality 2/10

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react-i18next:: You will need to pass in an i18next instance by using initReactI18next

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// add this import on root file
import '@/i18n/i18n.config';

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript i18next instance

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Contributed on Nov 15 2024

guiliuri

0 Answers Avg Quality 2/10

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