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Best practices for in-app database migration for Sqlite
...ay to update existing tables in-place. See the documentation here: http://www.sqlite.org/lang_altertable.html. For deleting columns or other changes that aren't supported by the "ALTER TABLE" syntax, I create a new table, migrate date into it, drop the old table, and rename the new table to the or...
How do I mock an open used in a with statement (using the Mock framework in Python)?
...rotocol methods (magic methods), particularly using the MagicMock:
http://www.voidspace.org.uk/python/mock/magicmock.html
An example of mocking open as a context manager (from the examples page in the mock documentation):
>>> open_name = '%s.open' % __name__
>>> with patch(open_...
Windows batch: echo without new line
...white space may be stripped
Leading = causes a syntax error.
See http://www.dostips.com/forum/viewtopic.php?f=3&t=4209 for more information.
jeb posted a clever solution that solves most of the problems at Output text without linefeed, even with leading space or = I've refined the method so ...
Bootstrap 3 and 4 .container-fluid with grid adding unwanted padding
...Bootstrap. But it works for now (Bootstrap 3.3.5 & 4.0-alpha).
http://www.bootply.com/ioWBaljBAd
Sample HTML:
<div class="container">
<div class="row full-width-row">
<div>
<div class="col-sm-4 col-md-3">…</div>
<div class="col-sm-4 col-md-...
Git command to display HEAD commit id?
...
According to https://git-scm.com/docs/git-log,
for more pretty output in console you can use --decorate argument of git-log command:
git log --pretty=oneline --decorate
will print:
2a5ccd714972552064746e0fb9a7aed747e483c7 (HEAD ->...
What is unit testing and how do you do it? [duplicate]
...e on the NUnit site is a good introduction to the what and the how
http://www.nunit.org/index.php?p=quickStart&r=2.5
Is everything testable? Generally if it calculates something then yes. UI code is a whole other problem to deal with though, as simulating users clicking on buttons is tricky.
...
How to change an application icon programmatically in Android?
...omplished for a "new messages" type application similar to iPhone:
http://www.cnet.com/8301-19736_1-10278814-251.html
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Advantages and disadvantages of GUID / UUID database keys
...ation. But those are easilly solvable (comb guids by jimmy nillson: http://www.informit.com/articles/article.aspx?p=25862 )
Edit merged my two answers to this question
@Matt Sheppard I think he means that you can duplicate rows with different GUIDs as primary keys. This is an issue with any kind o...
9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...port 22 -m state --state NEW,ESTABLISHED -j ACCEPT
类似的，对于HTTP/HTTPS(80/443)、pop3(110)、rsync(873)、MySQL(3306)等基于tcp连接的服务，也可以参照上述命令配置。
对于基于udp的dns服务，使用以下命令开启端口服务：
iptables -A OUTPUT -p udp -o ...
How do I put two increment statements in a C++ 'for' loop?
...
Try not to do it!
From http://www.research.att.com/~bs/JSF-AV-rules.pdf:
AV Rule 199
The increment expression in a for loop will perform no action other than to change a single
loop parameter to the next value for the loop.
Rationale: Reada...