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Find element's index in pandas Series
...l)
Uses a hashtable internally, so fast
In [7]: s = Series(randint(0,10,10000))
In [9]: %timeit s[s == 5]
1000 loops, best of 3: 203 µs per loop
In [12]: i = Index(s)
In [13]: %timeit i.get_loc(5)
1000 loops, best of 3: 226 µs per loop
As Viktor points out, there is a one-time creation ove...
REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...
#kernel.shmmax = 536870912
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
# /sbin/sysctl -p (设置参数立即生效)
9、...
Is there a way to escape a CDATA end token in xml?
...the page for the National Transportation Safety Board. It contained US$>100 million (2013) for the budget in the infobox. The source xml contained [[United States dollar|US$]]>100 million (2013) which was translated to [[United States dollar|US$]]>100 million (2013) by the reader and th...
linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...m state --state NEW -j DROP
处理IP碎片数量,防止攻击,允许每秒100个
[root@tp ~]#iptables -A FORWARD -f -m limit --limit 100/s --limit-burst 100 -j ACCEPT
设置ICMP包过滤,允许每秒1个包,限制触发条件是10个包.
[root@tp ~]#iptables -A FORWARD -p icmp -m limit --limit 1...
Difference between virtual and abstract methods [duplicate]
...stpermonth(decimal amount)
{
return amount*12/100;
}
public virtual decimal totalamount(decimal Amount,decimal principleAmount)
{
return Amount + principleAmount;
}
}
public class derivedcla...
How to draw an empty plot?
...nts:
plot.new( )
plot.window( xlim=c(-5,5), ylim=c(-5,5) )
points( rnorm(100), rnorm(100) )
axis( side=1 )
example plot
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How to get all possible combinations of a list’s elements?
...s=abc * mask=###
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V
000 ->
001 -> c
010 -> b
011 -> bc
100 -> a
101 -> a c
110 -> ab
111 -> abc
Things to consider:
This requires that you can call len(...) on items (workaround: if items is something like an iterable like a generator, turn it into a list first wi...
JavaScript displaying a float to 2 decimal places
...u'd like to preserve it as a number type you can use:
Math.round(number * 100) / 100
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Can I create a named default constraint in an add column statement in SQL Server?
...be unique (results in a unique index implicitly)
,SomeUniqueString VARCHAR(100) NOT NULL CONSTRAINT UQ_TestTable_SomeUniqueString UNIQUE
--define two constraints, one for a default value and one for a value check
,SomeNumber INT NULL CONSTRAINT DF_TestTable_SomeNumber DEFAULT (0)
...
MySQL maximum memory usage
...28M
thread_cache_size = 8
max_connections = 400
innodb_lock_wait_timeout = 100
for a server with the following specifications:
Dell Server
CPU cores: Two
Processor(s): 1x Dual Xeon
Clock Speed: >= 2.33GHz
RAM: 2 GBytes
Disks: 1×250 GB SATA
...