Add more examples

tshemsedinov · tshemsedinov · commit 3b07d4ec477b · 2018-11-30T01:37:45.000+02:00
diff --git a/JavaScript/1-syntax.js b/JavaScript/1-syntax.js
@@ -0,0 +1,53 @@
+'use strict';
+
+// Docs: https://developer.mozilla.org/en-US/docs/Web
+//       /JavaScript/Reference/Global_Objects/RegExp
+
+/*
+    .  - single char
+    x? - optional or non-greedy
+    x+ - 1 or more times
+    x* - 0 or more times
+    () - group $1...$9
+    [] - chars
+    \x - escape x
+    ^x - line begin or negated expr
+    x$ - line end
+    x|y - either x or y
+*/
+
+const rx1 = /abc/;
+console.log('Do you know abc?'.match(rx1));
+
+const rx2 = new RegExp('abc');
+console.log('Do you know abc?'.match(rx2));
+
+const rx3 = /[a-z]+a[a-z]+/g;
+const st3 = 'A man can die but once';
+console.log(st3.match(rx3));
+
+const rx4 = /\sg\w*/g;
+const st4 = 'Some are born great, ' +
+  'some achieve greatness, ' +
+  'and some have greatness thrust upon them.';
+console.log(st4.match(rx4));
+
+const rx5 = /.u../g;
+const st5 = '— Such much? — For whom how';
+console.log(st5.match(rx5));
+
+const rx6 = /\w{3,5}/g;
+const st6 = '— MGIMO finished? — Ask?!';
+console.log(st6.match(rx6));
+
+const rx7 = /[^l] /g;
+const st7 = 'Nothing will come of nothing';
+console.log(st7.match(rx7));
+
+const rx8 = /^\+?\d{12}$/;
+const st8 = '+380661234567';
+console.log(st8.match(rx8));
+
+const rx9 = /[0-9]+ (hours|days)/g;
+const st9 = '5 days';
+console.log(st9.match(rx9));
diff --git a/JavaScript/2-regexp.js b/JavaScript/2-regexp.js
@@ -0,0 +1,28 @@
+'use strict';
+
+const rx = /[abc]/gi;
+
+console.dir({
+  rx,
+  flags: rx.flags,
+  global: rx.global,
+  ignoreCase: rx.ignoreCase,
+  multiline: rx.multiline,
+  source: rx.source,
+  sticky: rx.sticky,
+  unicode: rx.unicode,
+  lastIndex: rx.lastIndex,
+});
+
+console.dir({
+  xyz: rx.test('xyz'),
+  abc: rx.test('abc')
+});
+
+const s = 'abcdefgabc';
+
+let res;
+do {
+  res = rx.exec(s);
+  console.log({ lastIndex: rx.lastIndex, res });
+} while (res);
diff --git a/JavaScript/3-match.js b/JavaScript/3-match.js
@@ -1,8 +1,8 @@
 'use strict';
 
-const s = 'Hello user1@domain.com and user2@domain.com';
+const s = 'Hello <User1@domain.com> and user2@domain.com';
 
-const rx = /\S+@[\S.]+/g;
+const rx = /[a-z0-9\.]+@[a-z0-9\.]+/gi;
 
 const m = s.match(rx);
 
diff --git a/JavaScript/4-split.js b/JavaScript/4-split.js
@@ -1,12 +1,13 @@
 'use strict';
 
-const s = 'Hello World, here we are!';
-
-const words = (s
+const words = s => [...new Set(s
   .toLowerCase()
   .replace(/\W+/g, ' ')
   .trim()
   .split(/\s/)
-);
+)];
+
+const s = 'Hello World, here we are!';
 
-console.dir(words);
+console.dir(words(s));
+console.dir(words(s + s));
diff --git a/JavaScript/5-replace.js b/JavaScript/5-replace.js
diff --git a/JavaScript/6-replace-fn.js b/JavaScript/6-replace-fn.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const rx = /abc/gi;
+const s = 'abcdefgAbC';
+const res = s.replace(rx, (sub, pos, str) => {
+  console.dir({ sub, pos, str });
+  return sub.toUpperCase();
+});
+
+console.log(res);
diff --git a/JavaScript/7-search.js b/JavaScript/7-search.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const rx1 = /def/g;
+const s1 = 'abcdefgabc';
+const res1 = s1.search(rx1);
+console.log(res1);
+
+const rx2 = /cba/g;
+const s2 = 'abcdefgabc';
+const res2 = s2.search(rx2);
+console.log(res2);
