如果我在Vim中设置以下选项,
set textwidth=80
文本将以80个字符分隔.这有效,但问题是如果逗号(,)在一行的末尾,Vim会缩进下一行.我该怎么做才能避免这种行为？
有没有办法从archive.org上传或触发自己网站的快照到WayBackMachine？我已经检查了FAQ和archive.org API,但找不到用脚本触发这个的方法.
我想用(或其他方法)替换所有&字符.我已经尝试了几种组合并在这里阅读另一个问题,但没有什么可行的.\&String.gsub
"asdf & asdf".gsub("&", "\\\&") => "asdf & asdf"
我想隐藏一组用户的一些产品.我在editproducts.cgi配置中设置了组和产品.在组控制中,我将"隐藏"产品设置为NA/NA,但这没有效果.在搜索对话框(query.cgi上的products-dropdown)中,仍然有所有产品的列表.
如何从用户隐藏这些产品(用户不是其成员)？
编辑:我使用Bugzilla 4.0.2
如果我# ...在我的Makefile中放置comments(),make给我一个错误并退出.如果我删除注释,makefile工作正常.
Makefile:1: *** missing separator. Stop.
Makefile:
# Backup Makefile
#
# Create backups from various services and the system itself. This
# script is used to perform single backup tasks or a whole backup
# from the system. For more information about this file and how to
# use it, read the README file in the same directory.
BACKUP_ROOT = /srv/backup
ETC_PATH = /srv/config
SVN_PATH = /srv/svn/
TRAC_PATH = /srv/trac/sysinventory
PR10_PATH …我有一个使用终端原始模式的小 c 程序。当我退出程序（和原始模式）时，终端被清除。其他程序如 vim 可以处理这种情况并恢复终端输出。
在执行我的程序之前，是否有一个秘密的转义序列或其他东西来恢复终端？
有没有办法设置默认的初始化方法而不需要写下来？
class DataClass
attr_accessor :title, :description, :childs
def hasChilds?
@childs.nil?
end
end
我想用标准初始属性初始化此类。像这样的东西：
$> a = DataClass.new(:title => "adsf", :description => "test")
$> a.title # --> "asdf"
有这样的解决办法吗？
我想调整图像大小/缩放图像.原件尺寸与300x200或512x600不同.我想将图像调整为100x100,但不要从图像或变化率中裁剪任何东西.理想情况下,图像首先将长边缩放到100(纵横比),然后用白色填充较小的边缘.
.---------.
|- - - - -|
| IMAGE |
|- - - - -|
'---------'
我不使用Paperclip或Rails,只使用RMagick.
如果我理解文档正确,我可以这样写:
(let [a 5 b 10]
(print a)
(print b))
这按预期工作并打印出5和10.我在此代码片段中使用此机制(如果您需要更多参考,则完整代码在此处):
(defn create! [fields]
(let [username (user/unique-user (:author fields))
competition-id (:id (competition/latest))]
(if-not (exists? (:ld_uid fields))
(insert entries (values {
:ld_uid (:ld_uid fields)
:title (:title fields)
:description (:description fields)
:type (:type fields)
:user_id (:id username)
:competition_id competition-id})))
(for [link (:links fields)]
(source/create! (:id (by-ld-uid (:ld_uid fields))) (:url link) (:title link)))))
问题是,for表达式没有执行.这些语句按预期工作,但在上面的代码insert表达式中执行但for不是.我监督一些事情吗？我出于想法,这里出错了:(
我有一个Rails模型:
ruby-1.9.2-p0 > NavItem
=> NavItem(id: integer, item_identifier: string, description: string, description2: string, packing_unit: string, sales_unit_of_measure: string, ean_code: string, evp_price: string, item_category_code: string, class: string, product_group_code: string, maintenance_status: string)
如果我想创建一条记录:
ruby-1.9.2-p0 > NavItem.create
NoMethodError: undefined method `has_key?' for nil:NilClass
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activesupport-3.0.0/lib/active_support/whiny_nil.rb:48:in `method_missing'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activerecord-3.0.0/lib/active_record/attribute_methods/read.rb:69:in `class'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activerecord-3.0.0/lib/active_record/persistence.rb:285:in `attributes_from_column_definition'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activerecord-3.0.0/lib/active_record/locking/optimistic.rb:62:in `attributes_from_column_definition'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activerecord-3.0.0/lib/active_record/base.rb:1396:in `initialize'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activerecord-3.0.0/lib/active_record/base.rb:496:in `new'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/activerecord-3.0.0/lib/active_record/base.rb:496:in `create'
from (irb):20
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.0/lib/rails/commands/console.rb:44:in `start'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.0/lib/rails/commands/console.rb:8:in `start'
from /Users/amueller/.rvm/gems/ruby-1.9.2-p0/gems/railties-3.0.0/lib/rails/commands.rb:23:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
我能做什么？我有其他模型,工作得很好.我不知道如何捕获这个错误:(列中是否有任何保留字或者Rails尝试在此处应用一些配置而不是常规魔法？
我在Ruby …
是否存在将用户重定向到特定控制器#action的解决方案,如果没有匹配的路由？我有一个像这样的"最后规则":
match ":rest" => "application#notfound", :constraints => { :rest => /.*/ }
将所有"其他"内容重定向到应用程序#notfound.问题是具有自己路由的插件设置在 shis规则之下并且永远不会被调用.
我有以下代码
require 'test_helper'
class ApplicationControllerTest < ActionController::TestCase
test "should display the page in german" do
get :index
assert_response :success
# ...
request.env["HTTP_REFERER"] = :index
# ...
end
end
如果我运行此rails功能测试
$ rake test:functionals
我收到此错误:
test_should_display_the_page_in_german(ApplicationControllerTest):
NameError: undefined local variable or method `request' for #<ApplicationControllerTest:0x1044c6d00>
我如何访问"请求"变量？