如何在irb提示符中很好地打印大变量?我有一个包含许多变量的变量,这些变量很长,打印输出变得很乱。如果我只想要没有值的变量名怎么办?或者,我可以在一个单独的行上打印每个,根据深度选项卡吗?
答案 0 :(得分:4)
或者,我可以在一个单独的行上打印每个,根据深度选项卡吗?
使用pp(漂亮的印刷品):
require 'pp'
very_long_hash = Hash[(1..23).zip(20..42)]
pp very_long_hash
# Prints:
{1=>20,
2=>21,
3=>22,
4=>23,
5=>24,
6=>25,
7=>26,
8=>27,
9=>28,
10=>29,
11=>30,
12=>31,
13=>32,
14=>33,
15=>34,
16=>35,
17=>36,
18=>37,
19=>38,
20=>39,
21=>40,
22=>41,
23=>42}
答案 1 :(得分:2)
如果你想要的东西比“漂亮”的东西更棒,你可以使用"awesome" print。为了获得真正的间隔体验,请在您的IRb上撒上一些hirbal medicine!
例如,Hirb将ActiveRecord对象(或几乎任何数据库访问库)呈现为实际的ASCII表:+-----+-------------------------+-------------+-------------------+-----------+-----------+----------+
| id | created_at | description | name | namespace | predicate | value |
+-----+-------------------------+-------------+-------------------+-----------+-----------+----------+
| 907 | 2009-03-06 21:10:41 UTC | | gem:tags=yaml | gem | tags | yaml |
| 906 | 2009-03-06 08:47:04 UTC | | gem:tags=nomonkey | gem | tags | nomonkey |
| 905 | 2009-03-04 00:30:10 UTC | | article:tags=ruby | article | tags | ruby |
+-----+-------------------------+-------------+-------------------+-----------+-----------+----------+