Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).
+Use Array.every() to check if each passed object has the specified property and if it returns a truthy value.
truthCheckCollection = (collection, pre) => (collection.every(obj => obj[pre]));
+// truthCheckCollection([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}], "sex") -> true
+Generates all anagrams of a string (contains duplicates).
@@ -925,7 +934,20 @@ Return the string truncated to the desired length, with... appende
// truncateString('boomerang', 7) -> 'boom...'
Returns the first non-null/undefined argument.
+Use Array.find() to return the first non null/undefined argument.
const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_))
+// coalesce(null,undefined,"",NaN, "Waldo") -> ""
+Returns a customized coalesce function that returns the first argument that returns true from the provided argument validation function.
Use Array.find() to return the first argument that returns true from the provided argument validation function.
const coalesceFactory = valid => (...args) => args.find(valid);
+// const customCoalesce = coalesceFactory(_ => ![null, undefined, "", NaN].includes(_))
+// customCoalesce(undefined, null, NaN, "", "Waldo") //-> "Waldo"
+Extends a 3-digit color code to a 6-digit color code.
Use Array.map(), split() and Array.join() to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
Array.slice() is used to remove # from string start since it's added once.
... appende
Converts a colorcode to a rgb() string.
Use bitwise right-shift operator and mask bits with & (and) operator to convert a hexadecimal color code (prefixed with #) to a string with the RGB values. In case it's a 3-digit-colorcode, do the same with the 6-digit-colorcode extended by the extendHex() function (ref. extendHex snippet)
const hexToRgb = hex => {
- const extendHex = shortHex =>
+ const extendHex = shortHex =>
'#' + shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split('').map(x => x+x).join('');
- return hex.slice(1).length==3 ?
- `rgb(${parseInt(extendHex(hex).slice(1), 16) >> 16}, ${(parseInt(extendHex(hex).slice(1), 16) & 0x00ff00) >> 8}, ${parseInt(extendHex(hex).slice(1), 16) & 0x0000ff})`:
- `rgb(${parseInt(hex.slice(1), 16) >> 16}, ${(parseInt(hex.slice(1), 16) & 0x00ff00) >> 8}, ${parseInt(hex.slice(1), 16) & 0x0000ff})`;
-}
+ const extendedHex = hex.slice(hex.startsWith('#') ? 1 : 0).length === 3 ? extendHex(hex) : hex;
+ return `rgb(${parseInt(extendedHex.slice(1), 16) >> 16}, ${(parseInt(extendedHex.slice(1), 16) & 0x00ff00) >> 8}, ${parseInt(extendedHex.slice(1), 16) & 0x0000ff})`;
+}
// hexToRgb('#27ae60') -> 'rgb(39, 174, 96)'
// hexToRgb('#acd') -> 'rgb(170, 204, 221)'