Resolve "Merge the best from 7.40 branch"

SabrehavenOTClient/modules/corelib/string.lua

@@ -0,0 +1,59 @@
+-- @docclass string
+
+function string:split(delim)
+  local start = 1
+  local results = {}
+  while true do
+    local pos = string.find(self, delim, start, true)
+    if not pos then
+      break
+    end
+    table.insert(results, string.sub(self, start, pos-1))
+    start = pos + string.len(delim)
+  end
+  table.insert(results, string.sub(self, start))
+  table.removevalue(results, '')
+  return results
+end
+
+function string:starts(start)
+  return string.sub(self, 1, #start) == start
+end
+
+function string:ends(test)
+   return test =='' or string.sub(self,-string.len(test)) == test
+end
+
+function string:trim()
+  return string.match(self, '^%s*(.*%S)') or ''
+end
+
+function string:explode(sep, limit)
+  if type(sep) ~= 'string' or tostring(self):len() == 0 or sep:len() == 0 then
+    return {}
+  end
+
+  local i, pos, tmp, t = 0, 1, "", {}
+  for s, e in function() return string.find(self, sep, pos) end do
+    tmp = self:sub(pos, s - 1):trim()
+    table.insert(t, tmp)
+    pos = e + 1
+
+    i = i + 1
+    if limit ~= nil and i == limit then
+      break
+    end
+  end
+
+  tmp = self:sub(pos):trim()
+  table.insert(t, tmp)
+  return t
+end
+
+function string:contains(str, checkCase, start, plain)
+  if(not checkCase) then
+    self = self:lower()
+    str = str:lower()
+  end
+  return string.find(self, str, start and start or 1, plain == nil and true or false)
+end