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Error Code: 2013. Lost connection to MySQL server during query
...rror when I tried to add an index to a table using MySQL Workbench.
I noticed also that it appears whenever I run long query.
...
“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
...
Attach gdb to one of the httpd child processes and reload or continue working and wait for a crash and then look at the backtrace. Do something like this:
$ ps -ef|grep httpd
0 681 1 0 10:38pm ?? 0:00.45 /Applications/MAMP/Library/bin/httpd -k st...
Most lightweight way to create a random string and a random hexadecimal number
...me t1 and t2 as above:
>>> t1 = timeit.Timer("''.join(random.choice('0123456789abcdef') for n in xrange(30))", "import random")
>>> t2 = timeit.Timer("binascii.b2a_hex(os.urandom(15))", "import os, binascii")
>>> t3 = timeit.Timer("'%030x' % random.randrange(16**30)", "im...
谈谈创业公司技术的工作模式 - 资讯 - 清泛网 - 专注C/C++及内核技术
...们的模式应该是像中国的社会主义社会一样是基于敏捷的XX公司的开发模式。
好了，岗位都有了，咱们怎么分工合作呢？这时，因为是根据点子来演化产品，很多东西都是不确定的，不能定一个大的一成不变的长时间计划和需...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
... 开通VIP 搜索 App Inventor 2 拓展参考文档
中文网拓展
第三方拓展
工具
AI人工智能
UI界面
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PDB文件：每个开发人员都必须知道的 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的modules窗口的symbol file列可以查看PDB的load顺序。第一个搜索的路径是binary所在的路径，如果不在binary所在的路径，则查找binary中hardcode记录的build目录，例如obj\debug\*.pdb, 如果以上两个路径都没有找到PDB，则根据symbol server的设置...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
... 开通VIP 搜索 App Inventor 2 拓展参考文档
中文网拓展
第三方拓展
工具
AI人工智能
UI界面
...
Standard Android menu icons, for example refresh [closed]
... @Nilzor this tool seems to have been broken by the addition of XXXhigh icons. Pointing it to API22 SDK results in an error. Still works for older SDKs.
– codah
Jul 22 '15 at 0:28
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Check if a value exists in pandas dataframe index
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Just for reference as it was something I was looking for, you can test for presence within the values or the index by appending the ".values" method, e.g.
g in df.<your selected field>.values
g in df.index.values
I find that adding ...
大数据：用数据指导APP运营 - 资讯 - 清泛网 - 专注C/C++及内核技术
...效果。
在这里插一句，千万不要相信网上流传的各种《XX高管教你不花钱做运营》这种鸡汤文，运营一定有成本，必然有成本，如果认为运营高手可以不花钱办成事儿，那不如去相信男人可以怀孕生孩子。运营的效率可以通过...