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What is an xs:NCName type and when should it be used?
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NCName is non-colonized name e.g. "name". Compared to QName which is qualified name e.g. "ns:name". If your names are not supposed to be qualified by different namespaces, then they are NCNames.
xs:string puts no restrictions on your names at a...
git add . vs git commit -a
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3
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How can I put the current running linux process in background? [closed]
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Suspend the process with CTRL+Z then use the command bg to resume it in background. For example:
sleep 60
^Z #Suspend character shown after hitting CTRL+Z
[1]+ Stopped sleep 60 #Message showing stopped process info
bg #Resume current job (last job st...
oracle group 取每组第一条 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...，否则会有语法错误。
方法二：
SELECT * FROM(
SELECT z.type , z.code ,ROW_NUMBER()
OVER(PARTITION BY z.type ORDER BY z.code) AS code_id
FROM group_info z
)
WHERE code_id =1;
这里涉及到的over()是oracle的分析函数。
参考sql reference文档：
Analytic fu...
【解决】Linux mysql如何重置root密码？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...root密码。
你可以通过以下命令查到你的mysql版本:
[root@z ~]# mysql --version
如果你的系统中已经安装了MySQL，输出将如下所示：
mysql Ver 15.1 Distrib 5.5.60-MariaDB, for Linux (x86_64) using readline 5.1
请务必记下您正在运行的MySQL或MariaDB版本...
Matplotlib: “Unknown projection '3d'” error
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from mpl_toolkits.mplot3d import axes3d, Axes3D #<-- Note the capitalization!
fig = plt.figure()
ax = Axes3D(fig) #<-- Note the difference from your original code...
X, Y, Z = axes3d.get_test_data(0.05)
cset = ax.contour(X, Y, Z, 16, extend3d=True)
ax.clabel(cset, fontsize=9, inline=1)
pl...
Extract first item of each sublist
...list comprehension:
>>> lst = [['a','b','c'], [1,2,3], ['x','y','z']]
>>> lst2 = [item[0] for item in lst]
>>> lst2
['a', 1, 'x']
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how to permit an array with strong parameters
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answered May 15 '13 at 2:48
LeahcimLeahcim
33.2k5252 gold badges1621...
CSS Background Opacity [duplicate]
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answered May 2 '12 at 23:07
AlienWebguyAlienWebguy
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Python add item to the tuple
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You need to make the second element a 1-tuple, eg:
a = ('2',)
b = 'z'
new = a + (b,)
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