extra-array - npm Package Compare versions

Comparing version 2.0.13 to 2.0.14

fresh.js

@@ -23,2 +23,11 @@ // PURE FUNCTIONS
 /**
+ * Gets elements before last element.
+ * @param {Array} x array
+ * @returns {Array} elements before last
+ */
+function init(x) {
+  return x.slice(0, -1);
+}
+
+/**
  * Gets elements after head.
@@ -33,11 +42,26 @@ * @param {Array} x array
 /**
- * Gets elements before last element.
+ * Gets all initial segments.
  * @param {Array} x array
- * @returns {Array} elements before last
+ * @returns {Array} [initial segment ...]
  */
-function init(x) {
-  return x.slice(0, -1);
+function inits(x) {
+  var a = [];
+  for(var i=0, I=x.length; i<I; i++)
+    a.push(x.slice(0, i));
+  return a;
 }
 
 /**
+ * Gets all final segments.
+ * @param {Array} x array
+ * @returns {Array} [final segment ...]
+ */
+function tails(x) {
+  var a = [];
+  for(var i=0, I=x.length; i<I; i++)
+    a.push(x.slice(i));
+  return a;
+}
+
+/**
  * Gets largest element, as per compare function.
@@ -98,11 +122,24 @@ * @param {Array} x array
 function takeWhile(x, fn, ths=null) {
-  var a = [], i = -1;
-  for(var e of x) {
-    if(fn.call(ths, e, ++i, x)) a.push(e);
-    else break;
-  }
-  return a;
+  return x.slice(0, findFailIndex(x, fn, ths));
 }
 
 /**
+ * Get suffix remaining after takeWhile().
+ * @param {Array} x array
+ * @param {function} fn filter function (elem, index, array)
+ * @param {object?} ths this argument
+ * @returns {Array} suffix
+ */
+function dropWhile(x, fn, ths=null) {
+  return x.slice(findFailIndex(x, fn, ths));
+}
+
+function findFailIndex(x, fn, ths=null) {
+  var i = -1;
+  for(var e of x)
+    if(!fn.call(ths, e, ++i, x)) break;
+  return i;
+}
+
+/**
  * Splits array to elements which do, and dont satify the filter.
@@ -165,4 +202,6 @@ * @param {Array} x array
 exports.last = last;
+exports.init = init;
 exports.tail = tail;
-exports.init = init;
+exports.inits = inits;
+exports.tails = tails;
 exports.max = max;
@@ -173,4 +212,5 @@ exports.min = min;
 exports.takeWhile = takeWhile;
+exports.dropWhile = dropWhile;
 exports.partition = partition;
 exports.zip = zip;
 exports.append = append;

package.json

 {
   "name": "extra-array",
-  "version": "2.0.13",
+  "version": "2.0.14",
   "description": "Standard utility methods for Array.",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -5,2 +5,3 @@ cons
 intercalate
+dropWhileEnd
 
@@ -7,0 +8,0 @@ remove

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Improved metrics

Total package byte prevSize

23608

increased by4.01%

Lines of code

625

increased by6.11%

Number of lines in readme file

103

increased by0.98%

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Published versions last two months

0

decreased by-100%

No dependency changes