Update 0_beacon-chain.md

2019-02-22 12:58:59 +01:00 · 2019-02-22 12:58:59 +01:00 · a8c3c45faf
parent 830ae3be9a
commit a8c3c45faf
1 changed files with 1 additions and 4 deletions
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@ -1028,10 +1028,7 @@ def is_power_of_two(value: int) -> bool:
    """
    Check if ``value`` is a power of two integer.
    """
-    if value == 0:
-        return False
-    else:
-        return 2**int(math.log2(value)) == value
+    return (value > 0) && (value & (value - 1) == 0)
 ```

 ### `int_to_bytes1`, `int_to_bytes2`, ...