You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.3 KiB
53 lines
1.3 KiB
'use strict'; |
|
|
|
var safeIsNaN = Number.isNaN || |
|
function ponyfill(value) { |
|
return typeof value === 'number' && value !== value; |
|
}; |
|
function isEqual(first, second) { |
|
if (first === second) { |
|
return true; |
|
} |
|
if (safeIsNaN(first) && safeIsNaN(second)) { |
|
return true; |
|
} |
|
return false; |
|
} |
|
function areInputsEqual(newInputs, lastInputs) { |
|
if (newInputs.length !== lastInputs.length) { |
|
return false; |
|
} |
|
for (var i = 0; i < newInputs.length; i++) { |
|
if (!isEqual(newInputs[i], lastInputs[i])) { |
|
return false; |
|
} |
|
} |
|
return true; |
|
} |
|
|
|
function memoizeOne(resultFn, isEqual) { |
|
if (isEqual === void 0) { isEqual = areInputsEqual; } |
|
var cache = null; |
|
function memoized() { |
|
var newArgs = []; |
|
for (var _i = 0; _i < arguments.length; _i++) { |
|
newArgs[_i] = arguments[_i]; |
|
} |
|
if (cache && cache.lastThis === this && isEqual(newArgs, cache.lastArgs)) { |
|
return cache.lastResult; |
|
} |
|
var lastResult = resultFn.apply(this, newArgs); |
|
cache = { |
|
lastResult: lastResult, |
|
lastArgs: newArgs, |
|
lastThis: this, |
|
}; |
|
return lastResult; |
|
} |
|
memoized.clear = function clear() { |
|
cache = null; |
|
}; |
|
return memoized; |
|
} |
|
|
|
module.exports = memoizeOne;
|
|
|