problems.json

[
	{
		"title": "Level 1: First Steps",
		"tests": [
			{
				"name": "sums",
				"type": "raw",
				"prompt": "What will 1+2 evaluate to?",
				"wants": "3",
				"hints": {
					"2" : "You'll need to sum both numbers.",
					"42" : "Very funny, but still wrong.",
					"12" : "The + operator is sum, not concatenate."
				}
			},
			{
				"name": "obvious order",
				"type": "raw",
				"prompt": "Ok, how about 2+3*5?",
				"wants": "17"
			},
			{
				"name": "non-obvious order",
				"type": "raw",
				"prompt": "And what about 2*3+5?",
				"wants": "16",
				"hints": {
					"11" : "Expressions evaluate strictly right to left without obeying precedence.",
					"235" : "Numbers still aren't strings."
				}
			}
		]
	},
	{
		"title": "Level 2: Conformism",
		"tests": [
			{
				"name": "space separated list",
				"type": "raw",
				"prompt": "What will 1 2 evaluate to?",
				"wants": "1 2"
			},
			{
				"name": "atom-list conform",
				"type": "raw",
				"prompt": "So then, what will 1+2 3 evaluate to?",
				"wants": "3 4",
				"hints": {
					"1 2 3": "The + operator is sum, not concatenate.",
					"3 3": "The the sum of a scalar and a vector adds the scalar to each vector element."
				}
			},
			{
				"name": "list-list conform",
				"type": "raw",
				"prompt": "How about 2 3+5 10?",
				"wants": "7 13",
				"hints": {
					"2 8 10": "Remember, 2 3 is a list, and so is 5 10."
				}
			}
		]
	},
	{
		"title": "Level 3: Functionality",
		"tests": [
			{
				"name": "increment",
				"type": "func",
				"prompt": "Write a monad which increments its input by one.",
				"cases": [
					{
						"args":"[5]",
						"wants":"6",
						"hint":"Incrementing 5 should produce 6."
					},
					{
						"args":"[0]",
						"wants":"1",
						"hint":"Incrementing 0 should produce 1."
					},
					{
						"args":"[1 2 3]",
						"wants":"2 3 4",
						"hint":"This definition should work for lists as well as scalars."
					}
				]
			},
			{
				"name": "abs",
				"type": "func",
				"prompt": "Write a monad which returns the absolute value of its input.",
				"cases": [
					{
						"args":"[234]",
						"wants":"234",
						"hint":"The absolute value of a positive number remains the same."
					},
					{
						"args":"[-967.8]",
						"wants":"967.8",
						"hint":"The absolute value of a negative number should be positive."
					},
					{
						"args":"[0 24 -34 -9999]",
						"wants":"0 24 34 9999",
						"hint":"This definition should work for lists as well as scalars."
					}
				]
			}
		]
	}
]