How to use the not function from ramda
Find comprehensive JavaScript ramda.not code examples handpicked from public code repositorys.
ramda.not is a function that returns the logical inverse of a given predicate function.
93 94 95 96 97 98 99 100 101 102 103 104 105 106const camelToSnakeCase = (str) => (str.length < 3 ? str : handleCapitalizedWords(processCameToSnake(str).toLowerCase())) const isString = (str) => str && typeof str === 'string' const isNotEmpty = (str) => R.not(R.isEmpty(str)) const foldObject = (prop1, prop2, obj) => R.reduce( (acc, t) => {
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6556 557 558 559 560 561 562 563 564strictEqual(set(['a', 'b', 'a', 'c']).length, 3) strictEqual(3, set([{ name: 'Luke' }, { name: 'Yoda' }, { name: 'Obi-Wan' }, { name: 'Yoda' }], 'name').length) }) it('should get the NODE env variable', () => { strictEqual(true, R.not(R.isNil(env('NODE')))) strictEqual('BAR', env('FOO', 'BAR')) })
3446How does ramda.not work?
ramda.not is a higher-order function that takes a single predicate function as an argument, and returns a new function that returns the logical inverse of the result of calling the original predicate function with the same arguments. In other words, if the original predicate function returns a truthy value, the new function returned by ramda.not will return false. If the original predicate function returns a falsy value, the new function will return true. Here's the signature of ramda.not: rust Copy code {{{{{{{ class="!whitespace-pre hljs language-rust">ramda.not :: (a -> Boolean) -> a -> Boolean The first argument is a predicate function that takes a single argument of any type and returns a boolean value. The second argument is the value to be tested by the predicate function. ramda.not is a convenient way to invert the logic of a predicate function without having to write a separate function to do so.
GitHub: muqsitnawaz/deepcoin
108 109 110 111 112 113 114 115 116'transaction': input.transaction, 'index': input.index })); // Find the candidate transaction in the selected transaction list (avoiding double spending) let wasItFoundInSelectedTransactions = R.not(R.isNil(findInputTransactionInTransactionList(inputTransactionsInTransaction(selectedTransactions)))); // Find the candidate transaction in the blockchain (avoiding mining invalid transactions) let wasItFoundInBlocks = R.not(R.isNil(findInputTransactionInTransactionList(inputTransactionsInTransaction(transactionsInBlocks))));
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182 183 184 185 186 187 188 189 190 191addRungSpecHeightsAndWidths(aspectRatio), when( R.pipe( R.path(['limits', 'finalBitrateMax']), R.isNil, R.not ), rungSpecsCapMaxBitrate ), rungSpecsRoundBitrates
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Ai Example
1 2 3 4 5 6 7const R = require("ramda"); const isEven = (n) => n % 2 === 0; const isOdd = R.not(isEven); console.log(isOdd(3)); // Output: true console.log(isOdd(4)); // Output: false
In this example, we first define a isEven function that takes a number n and returns true if it is even, and false otherwise. We then use ramda.not to create a new function isOdd that returns true if isEven returns false for a given argument. Finally, we test the isOdd function with the numbers 3 and 4, and log the results to the console.
3280 3281 3282 3283 3284 3285 3286 3287 3288 3289* @param {*} a any value * @return {Boolean} the logical inverse of passed argument. * @see R.complement * @example * * R.not(true); //=> false * R.not(false); //=> true * R.not(0); //=> true * R.not(1); //=> false */
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