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Undocumented NSURLErrorDomain error codes (-1001, -1003 and -1004) using StoreKit
...Unknown = -998,
kCFURLErrorCancelled = -999,
kCFURLErrorBadURL = -1000,
kCFURLErrorTimedOut = -1001,
kCFURLErrorUnsupportedURL = -1002,
kCFURLErrorCannotFindHost = -1003,
kCFURLErrorCannotConnectToHost = -1004,
kCFURLErrorNetworkConnectionLost = -1005,
kCFURLErrorDNSLookupF...
How to check if an object is a certain type
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160
In VB.NET, you need to use the GetType method to retrieve the type of an instance of an object...
How to check if string input is a number? [duplicate]
How do I check if a user's string input is a number (e.g. -1 , 0 , 1 , etc.)?
24 Answers
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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...工具集
推荐算法工具集
创建自己的推荐引擎构造器
1. Mahout推荐引擎概况
Mahout的推荐引擎，要从org.apache.mahout.cf.taste包说起。
packages的说明：
common: 公共类包括，异常，数据刷新接口，权重常量
eval: 定义构造器接口，...
Simulate delayed and dropped packets on Linux
...going out of the local Ethernet.
# tc qdisc add dev eth0 root netem delay 100ms
Now a simple ping test to host on the local network should show an increase of 100 milliseconds. The delay is limited by the clock resolution of the kernel (Hz). On most 2.4 systems, the system clock runs at 100 ...
Random Number Between 2 Double Numbers
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12 Answers
12
Active
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Why do I need Transaction in Hibernate for read-only operations?
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131
You might actually have reasons to mark transactions as read-only.
Transactions for reading ...
How can I add “href” attribute to a link dynamically using JavaScript?
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163
var a = document.getElementById('yourlinkId'); //or grab it by tagname etc
a.href = "somelink ...
Private virtual method in C++
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118
Herb Sutter has very nicely explained it here.
Guideline #2: Prefer to make virtual functions...
In MySQL queries, why use join instead of where?
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162
Any query involving more than one table requires some form of association to link the results ...