Collections and Loops

Lists

nums = [1, 2, 3]
nums.append(4)
print(length(nums))

Useful list methods:

• append(value)

• extend(list)

• insert(index, value)

• pop()

• has(value)

Maps

scores = {"a": 10, "b": 20}
print(scores.get("a"))
print(scores.has("b"))

Useful map methods:

• has(key)

• delete(key)

• keys()

• values()

• get(key[, fallback])

• pop(key[, fallback])

for with range

for i in range(5):
    print(i)

for over list

names = ["aja", "sendiri"]
for name in names:
    print(name)

Comprehensions

nums = [1, 2, 3, 4]
squares = [x * x for x in nums]
even_map = {str(x): x for x in nums if x % 2 == 0}