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Add if tests, most of this is actually the work of @jwadhams, but I've tweaked the ordering and descriptions.
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‎suites/control/if.json‎

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[]
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[
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"Boolean checks",
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{
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"description": "true is true, and uses the then",
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"rule": { "if": [true, "apple", "banana"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "false is false, and uses the fallback",
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"rule": { "if": [false, "apple", "banana"] },
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"data": null,
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"result": "banana"
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},
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"Null check",
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{
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"description": "null is falsy",
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"rule": { "if": [[], "apple", "banana"] },
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"data": null,
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"result": "banana"
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},
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"Object checks",
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{
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"description": "Objects are always truthy, even without keys.",
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"rule": { "if": [{}, "apple", "banana"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Objects are always truthy, with keys defined",
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"rule": { "if": [{ "val": [] }, "apple", "banana"] },
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"data": { "some": "value" },
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"result": "apple"
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},
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"Array checks",
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{
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"description": "Empty array is falsy",
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"rule": { "if": [[], "apple", "banana"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Array with single element is truthy",
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"rule": { "if": [[1], "apple", "banana" ] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Array with multiple elements is truthy",
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"rule": { "if": [[1, 2, 3, 4], "apple", "banana" ] },
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"data": null,
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"result": "apple"
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},
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"String checks",
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{
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"description": "Empty string is falsy",
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"rule": { "if": ["", "apple", "banana"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Any non-empty string is truthy",
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"rule": { "if": ["zucchini", "apple", "banana"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Any non-empty string is truthy, even 0",
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"rule": { "if": ["0", "apple", "banana"] },
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"data": null,
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"result": "apple"
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},
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"Too few arguments",
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{
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"description": "No arguments is just null.",
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"rule": { "if": [] },
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"data": null,
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"result": null
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},
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{
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"description": "If no then is defined when true, it'll just return null.",
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"rule": { "if": [true] },
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"data": null,
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"result": true
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},
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{
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"description": "If no fallback is defined when falsy, it'll just return null.",
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"rule": { "if": [false] },
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"data": null,
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"result": false
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},
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{
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"description": "If no then is defined when truthy, it'll just return null.",
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"rule": { "if": ["apple"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "When truthy, it'll return the 'then' even if no fallback is defined.",
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"rule": { "if": [true, "apple"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "When falsy, it'll return null if the fallback is not defined, even if the 'then' is defined.",
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"rule": { "if": [false, "apple"] },
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"data": null,
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"result": null
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},
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"Variadic Tests",
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{
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"description": "Returns the first truthy if condition",
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"rule": { "if": [true, "apple", false, "banana"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Returns the first truthy then condition, even if multiple conditions are true",
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"rule": { "if": [true, "apple", true, "banana"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Retuns the first truthy condition, with the fallback defined.",
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"rule": { "if": [true, "apple", false, "banana", "carrot"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Returns the first truthy condition, with the fallback defined; multiple true conditions.",
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"rule": { "if": [true, "apple", true, "banana", "carrot"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Returns the first truthy condition, with the first condition falsy. Fallback defined.",
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"rule": { "if": [false, "apple", true, "banana", "carrot"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Returns the first truthy condition, in this case it's the 2nd one.",
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"rule": { "if": [false, "apple", true, "banana"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "When none of the conditions are true, it returns the fallback.",
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"rule": { "if": [false, "apple", false, "banana", "carrot"] },
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"data": null,
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"result": "carrot"
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},
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{
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"description": "When none of the conditions are true, it returns the fallback. In this case the fallback is not defined, so it is null.",
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"rule": { "if": [false, "apple", false, "banana"] },
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"data": null,
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"result": null
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},
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{
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"description": "3 Conditions, all falsy. Returns fallback.",
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"rule": { "if": [false, "apple", false, "banana", false, "carrot", "date"] },
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"data": null,
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"result": "date"
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},
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{
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"description": "3 Conditions, all falsy, no fallback defined. Returns null.",
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"rule": { "if": [false, "apple", false, "banana", false, "carrot"] },
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"data": null,
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"result": null
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},
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{
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"description": "First condition truthy, 3 conditions.",
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"rule": { "if": [true, "apple", false, "banana", false, "carrot", "date"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "2nd Condition is Truthy",
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"rule": { "if": [false, "apple", true, "banana", false, "carrot", "date"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Third Condition is Truthy",
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"rule": { "if": [false, "apple", false, "banana", true, "carrot", "date"] },
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"data": null,
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"result": "carrot"
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},
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{
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"description": "Returns first truthy value, some conditions truthy",
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"rule": { "if": [false, "apple", true, "banana", true, "carrot", "date"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Returns first truthy value, some conditions truthy (2)",
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"rule": { "if": [true, "apple", false, "banana", true, "carrot", "date"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Returns first truthy value, some conditions truthy (3)",
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"rule": { "if": [true, "apple", true, "banana", false, "carrot", "date"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Returns first truthy value, all conditions truthy",
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"rule": { "if": [true, "apple", true, "banana", true, "carrot", "date"] },
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"data": null,
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"result": "apple"
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},
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"Some Variadic Checks with Other Types",
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{
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"description": "Returns first truthy value, some conditions truthy (4)",
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"rule": { "if": [false, "apple", [1], "banana", true, "carrot", "date"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Returns first truthy value, some conditions truthy (5)",
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"rule": { "if": [false, "apple", "This is true", "banana", true, "carrot", "date"] },
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"data": null,
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"result": "banana"
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},
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{
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"description": "Returns first truthy value, some conditions truthy (6)",
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"rule": { "if": [null, "apple", 0, "banana", 7, "carrot", "date"] },
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"data": null,
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"result": "carrot"
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},
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{
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"description": "Returns first truthy value, some conditions truthy (7)",
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"rule": { "if": ["0", "apple", 0, "banana", 7, "carrot", "date"] },
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"data": null,
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"result": "apple"
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},
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{
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"description": "Returns first truthy value, some conditions truthy (8)",
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"rule": { "if": [{}, "apple", 0, "banana", 7, "carrot", "date"] },
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"data": null,
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"result": "apple"
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}
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]

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