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codistwa / exponential.py
Last active February 23, 2022 15:25
Course source code: https://codistwa.com/guides/exponential-function. More courses on https://codistwa.com
# ============================================================
# Display of the function
# ============================================================
x = np.linspace(-3,3,100)
plt.plot(x,np.exp(x))
plt.xlabel('x')
plt.ylabel('$e^x$')
@codistwa
codistwa / objects.js
Last active March 18, 2023 20:09
Course source code: https://codistwa.com/guides/data-structures-objects-dictionaries/. More courses on https://codistwa.com
// ============================================================
// Definition of an object / dictionary
// ============================================================
const fruits = {
color: 'red',
length: 3
}
// ============================================================
@codistwa
codistwa / array.py
Last active February 23, 2022 15:27
Course source code: https://codistwa.com/guides/data-structures-arrays. More courses on https://codistwa.com
# ============================================================
# Definition of an array
# ============================================================
empty = []
print(empty) # []
fruits = ['apple', 'lemon']
print(fruits) # [ 'apple', 'lemon' ]
@codistwa
codistwa / data-manipulation.sql
Last active February 23, 2022 15:28
Course source code: https://codistwa.com/guides/data-manipulation-select-distinct-insert-order-by-where. More courses on https://codistwa.com
-- ============================================================
-- SELECT
-- ============================================================
SELECT *
FROM humanresources.employee;
SELECT jobtitle
FROM humanresources.employee;
@codistwa
codistwa / conditions.js
Last active February 23, 2022 15:28
Course source code: https://codistwa.com/guides/conditional-expressions-and-logical-operators. More courses on https://codistwa.com
// ============================================================
// Comparison operators
// ============================================================
console.log(3 < 2); // false
console.log(1 == '1'); // true
console.log('Banana' === 'Banana'); // true
console.log('Banana' !== 'Apple'); // true
console.log('Banana' != 'Apple'); // true
console.log(2 <= 3); // true
@codistwa
codistwa / big-o.js
Last active February 23, 2022 15:27
Course source code: https://codistwa.com/guides/big-o-notation-and-complexity-time. More courses on https://codistwa.com
// ============================================================
// O(1) : constant complexity
// ============================================================
function constantO(num) {
return num;
}
console.log(constantO(10)); // 10