organization in the src structure, modification of README

src/builtin_structures/numbers/search_entry_matrix.py

@@ -0,0 +1,40 @@
+#!/usr/bin/python3
+# mari von steinkirch @2013
+# steinkirch at gmail
+
+
+
+def find_elem_matrix_bool(m1, value):
+    ''' Search an Entry in a Matrix where the Rows and columns are Sorted
+        In this 2D matrix, every row is increasingly sorted from left to right, 
+        and every column is increasingly sorted from top to bottom. 
+        The runtime is O(m+n). '''
+    found = False
+    row = 0
+    col = len(m1[0]) - 1
+    while row < len(m1) and col >= 0:
+        if m1[row][col] == value:
+            found = True
+            break
+        elif m1[row][col] > value:
+            col-=1
+        else:
+            row+=1
+    return found
+    
+
+
+def test_find_elem_matrix_bool(module_name='this module'):
+    m1 = [[1,2,8,9], [2,4,9,12], [4,7,10,13], [6,8,11,15]]
+    assert(find_elem_matrix_bool(m1,8) == True)
+    assert(find_elem_matrix_bool(m1,3) == False)
+    m2 = [[0]]
+    assert(find_elem_matrix_bool(m2,0) == True)
+        
+    s = 'Tests in {name} have {con}!'
+    print(s.format(name=module_name, con='passed'))
+
+
+if __name__ == '__main__':
+    test_find_elem_matrix_bool()
+