string: title() and small fixes

compiler/main.v

@@ -818,7 +818,6 @@ fn new_v(args[]string) *V {
 		dir: dir
 		lang_dir: vroot
 		table: new_table(obfuscate)
-		out_name: out_name
 		out_name_c: out_name_c
 		cgen: new_cgen(out_name_c)
 		vroot: vroot

vlib/builtin/string.v

@@ -321,7 +321,7 @@ pub fn (s string) left(n int) string {
 	}
 	return s.substr(0, n)
 }
-
+// 'hello'.right(2) => 'llo'
 pub fn (s string) right(n int) string {
 	if n >= s.len {
 		return ''
@@ -447,6 +447,9 @@ pub fn (s string) count(substr string) int {
 	if s.len == 0 || substr.len == 0 {
 		return 0
 	}
+	if substr.len > s.len {
+		return 0
+	}
 	mut n := 0
 	mut i := 0
 	for {
@@ -480,7 +483,7 @@ pub fn (s string) ends_with(p string) bool {
 
 // TODO only works with ASCII
 pub fn (s string) to_lower() string {
-	mut b := malloc(s.len)// TODO + 1 ??
+	mut b := malloc(s.len + 1)
 	for i := 0; i < s.len; i++ {
 		b[i] = C.tolower(s.str[i])
 	}
@@ -488,13 +491,31 @@ pub fn (s string) to_lower() string {
 }
 
 pub fn (s string) to_upper() string {
-	mut b := malloc(s.len)// TODO + 1 ??
+	mut b := malloc(s.len + 1)
 	for i := 0; i < s.len; i++ {
 		b[i] = C.toupper(s.str[i])
 	}
 	return tos(b, s.len)
 }
 
+pub fn (s string) capitalize() string {
+	sl := s.to_lower()
+    cap := sl[0].str().to_upper() + sl.right(1)
+	return cap 
+}
+
+pub fn (s string) title() string {
+	 words := s.split(' ')
+	 mut tit := []string
+
+	for word in words {
+		tit << word.capitalize()
+	}
+	title := tit.join(' ')
+
+	return title	
+}
+
 // 'hey [man] how you doin'
 // find_between('[', ']') == 'man'
 pub fn (s string) find_between(start, end string) string {

vlib/builtin/string_test.v

@@ -99,7 +99,7 @@ fn test_split() {
 	assert vals.len == 2
 	assert vals[0] =='2018-01-01'
 	assert vals[1] == '13:01:02'
-	// /////////////
+	// //////////
 	s = '4627a862c3dec29fb3182a06b8965e0025759e18___1530207969___blue'
 	vals = s.split('___')
 	assert vals.len == 3
@@ -214,7 +214,6 @@ fn test_runes() {
 	assert u.substr(1, 2) == 'р'
 	assert s2.ustring().at(1) == 'r'
 	assert u.at(1) == 'р'
-	// ///////
 	first := u.at(0)
 	last := u.at(u.len - 1)
 	assert first.len == 2
@@ -236,6 +235,22 @@ fn test_lower() {
 	assert s.to_lower() == 'hi'
 }
 
+fn test_upper() {
+	mut s := 'a'
+	assert s.to_upper() == 'A'
+	assert s.to_upper().len == 1
+	s = 'hello'
+	assert s.to_upper() == 'HELLO'
+	assert s.to_upper().len == 5
+	s = 'Aloha'
+	assert s.to_upper() == 'ALOHA'
+	s = 'have a nice day!'
+	assert s.to_upper() == 'HAVE A NICE DAY!'
+	s = 'hi'
+	assert s.to_upper() == 'HI'
+
+}
+
 fn test_left_right() {
 	s := 'ALOHA'
 	assert s.left(3) == 'ALO'
@@ -355,3 +370,21 @@ fn test_count() {
 	assert 'aabbaa'.count('aa') == 2
 	assert 'bbaabb'.count('aa') == 1
 }
+
+fn test_capitalize() {
+	mut s := 'hello'
+	assert s.capitalize() == 'Hello'
+	s = 'test'
+	assert s.capitalize() == 'Test'
+    s = 'i am ray'
+	assert s.capitalize() == 'I am ray'
+}
+
+fn test_title() {
+	mut s := 'hello world'
+	assert s.title() == 'Hello World'
+	s.to_upper()
+	assert s.title() == 'Hello World'
+	s.to_lower()
+	assert s.title() == 'Hello World' 
+} 

vlib/math/stats/stats.v

@@ -2,6 +2,8 @@ module stats
 
 import math
 
+// TODO: Implement all of them with generics 
+
 // This module defines the following statistical operations on f64 array 
 //  ---------------------------
 // |   Summary of Functions    |