refactor: replace lodash packages

package.json

@@ -22,8 +22,6 @@
   "dependencies": {
     "fantasy-land": "^3.5.0",
     "hm-parser": "^0.1.5",
-    "lodash.cond": "^4.5.2",
-    "lodash.frompairs": "^4.0.1",
     "mem": "^4.0.0",
     "sanctuary": "^0.15.0",
     "sanctuary-def": "^0.18.1",

src/signature.js

@@ -1,8 +1,6 @@
 import S from 'sanctuary';
 import HMP from 'hm-parser';
 import memoize from 'mem';
-import cond from 'lodash.cond';
-import fromPairs from 'lodash.frompairs';
 import Reader from './Reader';
 
 /*
@@ -36,6 +34,18 @@ const indexBy = memoize
   (f => S.reduce
     (xs => x => S.insert (f (x)) (x) (xs))
     ({}));
+//    fromPairs :: Array (Array2 String a) -> StrMap a
+const fromPairs = S.reduce
+  (acc => curr => S.insert (curr[0]) (curr[1]) (acc))
+  ({});
+//    cond :: Array (Array2 (a -> Boolean) (a -> b)) -> a -> b
+const cond = conds => x => {
+  const c = conds.find (y => y[0] (x));
+  if (c !== undefined) {
+    return c[1] (x);
+  }
+  throw new Error (`No predicate was satisfied for ${x}`);
+};
 
 //    stripNamespace :: String -> String
 const stripNamespace = memoize (xs => xs.split ('/').pop ());

yarn.lock

@@ -2143,21 +2143,11 @@ locate-path@^2.0.0:
     p-locate "^2.0.0"
     path-exists "^3.0.0"
 
-lodash.cond@^4.5.2:
-  version "4.5.2"
-  resolved "https://registry.yarnpkg.com/lodash.cond/-/lodash.cond-4.5.2.tgz#f471a1da486be60f6ab955d17115523dd1d255d5"
-  integrity sha1-9HGh2khr5g9quVXRcRVSPdHSVdU=
-
 lodash.debounce@^4.0.8:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
   integrity sha1-gteb/zCmfEAF/9XiUVMArZyk168=
 
-lodash.frompairs@^4.0.1:
-  version "4.0.1"
-  resolved "https://registry.yarnpkg.com/lodash.frompairs/-/lodash.frompairs-4.0.1.tgz#bc4e5207fa2757c136e573614e9664506b2b1bd2"
-  integrity sha1-vE5SB/onV8E25XNhTpZkUGsrG9I=
-
 lodash@^4.17.10, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.3.0:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"