使用 base64 在 Ruby 中解码
Decoding in Ruby using base64
如何解码以下二进制 64 位浮点数？
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
使用Base64.decode64('insert above binary data here')returns下面的乱码
�F�pHf�FnHP�G:�G�3GdW�F��G1��FyG�
JG�>GnJ�F[o�G�vG��G�^;H�k
��F�B�F0� G���F���F�`?G��Ge��GL��F})�F�S�F�A�F"A�F��F3�F�F�C�Ft:G�QG �Fx܊F.iG�Fl�F44qGgɰF��MGuP�H/�#G���FU
�G*�Fa��F
我需要将它解码成这样的浮点数列表
27489.1602
57338.4453
45343.3516
91321.0391
43205.043
等等....
感谢您的帮助！
您可以使用s.unpack('m*')[0]解码Base64字符串。
等于：Base64.decode64(s)
现在我们有了一个要#unpack的字符串，将位序列转换成新的对象。
位序列包含 1368 个字节（一旦 Base64 被解码），它包含 171 个 64 位序列....我想也许这就是您要找的：
s.unpack('m*')[0].unpack('d*')
# => [595.6329345703125, 596.281005859375, 596.529296875, ... ]
...只是我没有得到您示例中的值，所以我一定是错的。
如何解码以下二进制 64 位浮点数？
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
使用Base64.decode64('insert above binary data here')returns下面的乱码
�F�pHf�FnHP�G:�G�3GdW�F��G1��FyG� JG�>GnJ�F[o�G�vG��G�^;H�k ��F�B�F0� G���F���F�`?G��Ge��GL��F})�F�S�F�A�F"A�F��F3�F�F�C�Ft:G�QG �Fx܊F.iG�Fl�F44qGgɰF��MGuP�H/�#G���FU �G*�Fa��F
我需要将它解码成这样的浮点数列表 27489.1602 57338.4453 45343.3516 91321.0391 43205.043 等等....
感谢您的帮助！
您可以使用s.unpack('m*')[0]解码Base64字符串。
等于：Base64.decode64(s)
现在我们有了一个要#unpack的字符串，将位序列转换成新的对象。
位序列包含 1368 个字节（一旦 Base64 被解码），它包含 171 个 64 位序列....我想也许这就是您要找的：
s.unpack('m*')[0].unpack('d*')
# => [595.6329345703125, 596.281005859375, 596.529296875, ... ]
...只是我没有得到您示例中的值，所以我一定是错的。