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Should I use single or double colon notation for pseudo-elements?
...er123444555621user123444555621
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
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其中：
values - 表示待发送的数据（这里是单字节0x01，表示高电平）
signed - 表示values数据是否是有符号的数值（假表示无符号）
serviceUuid - 服务UUID，通俗来讲它就是硬件的唯一身份ID
characteristicUuid - 特性UUID，通俗来...
How do you return from 'gf' in Vim
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jopjop
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How to prevent browser page caching in Rails
...nse.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
end
end
Rails 4 and older versions:
class ApplicationController < ActionController::Base
before_filter :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Co...
DateTime2 vs DateTime in SQL Server
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DATETIME2 has a date range of "0001 / 01 / 01" through "9999 / 12 / 31" while the DATETIME type only supports year 1753-9999.
Also, if you need to, DATETIME2 can be more precise in terms of time; DATETIME is limited to 3 1/3 milliseconds, while DATETIME2 ca...
Coffeescript — How to create a self-initiating anonymous function?
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As of CoffeeScript 1.3.1 (released April 2012), do also lets you pass arguments to the function. To pass 1 and 2 as the parameters x and y, write do (x = 1, y = 2) ->. (The documentation for this feature has gotten lost, but the issue where the feature was introdu...
Cannot truncate table because it is being referenced by a FOREIGN KEY constraint?
...ime.
– Tom Stickel
May 11 '17 at 20:01
1
And how would you do that? Example requests?
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Remove file extension from a file name string
...s file path
– lemon
Oct 2 '15 at 22:01
8
This is a better answer as it preserves the path
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How to validate IP address in Python? [duplicate]
...ot work with all legal IP addresses: >>> socket.inet_aton("2001:660::1") Traceback (most recent call last): File "<stdin>", line 1, in <module> socket.error: illegal IP address string passed to inet_aton
– bortzmeyer
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Are PHP short tags acceptable to use?
...er host.
– Dean Or
Jun 28 '14 at 21:01
2
@BSeven, Do you mean you don't use any PHP extensions ex...