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Best way to create unique token in Rails?
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Ryan Bates uses a nice little bit of code in his Railscast on beta invitations. This produces a 40 character alphanumeric string.
Digest::SHA1.hexdigest([Time.now, rand].join)
s...
How do I make a textbox that only accepts numbers?
... edited Oct 14 '14 at 15:40
Bitterblue
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answered Jan 20 '09 at 22:04
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qmake: could not find a Qt installation of ''
...-qtX was bundled under the relevant qt version. Pulling in these pieces is bit cumbersome.
– Xofo
Sep 23 '16 at 5:29
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SVN change username
...he repository will ask you again for username/password information.
(For Windows, the steps are analogous; the auth directory is in %APPDATA%\Subversion\).
Note that this will only work for SVN access schemes where the user name is part of the server login so it’s no use for repositories access...
微软推出Win10物联网版 新系统要“无处不在” - 资讯 - 清泛网 - 专注C/C++及内核技术
微软推出Win10物联网版 新系统要“无处不在”今年3月，微软就发布了Win 10的物联网版本，意在使和其他版本一起渗透到人们的生活和工作中，成为真正无处不在的操作系统。
今年3月，微软就发布了Win 10的物联网版本，意在使...
How to create a GUID/UUID in Python
...ther using it in any UUID contexts, you may as well just use random.getrandbits(128).to_bytes(16, 'little') or (for crypto randomness) os.urandom(16) and get a full 128 bits of random (UUIDv4 uses 6-7 bits on version info). Or use only 15 bytes (losing 1-2 bits of random vs. UUIDv4) and avoid the ne...
Error to install Nokogiri on OSX 10.9 Maverick?
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You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
Update
For t...
Controlling mouse with Python
... mouse cursor in Python, i.e. move it to certain position and click, under Windows?
14 Answers
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Maximum length of the textual representation of an IPv6 address?
...1 + 15 = 45
Note, this is an input/display convention - it's still a 128 bit address and for storage it would probably be best to standardise on the raw colon separated format, i.e. [0000:0000:0000:0000:0000:ffff:c0a8:64e4] for the address above.
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How do I initialize a byte array in Java?
...store these values, instead of byte arrays:
UUID
public UUID(long mostSigBits,
long leastSigBits)
Constructs a new UUID using the specified data. mostSigBits is used for the most significant 64 bits of the UUID and leastSigBits becomes the least significant 64 bits of the UUID.
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