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Rails: select unique values from a column
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Sergio TulentsevSergio Tulentsev
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Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b') [duplicate]
...ill take place here. We can follow this in the specification, section 11.9.3, The Abstract Equality Comparison Algorithm.
The operands are denoted as x and y (x == y).
In our case, x is a string ('0') and y is a Boolean (true). Hence step 7 is executed:
If Type(y) is Boolean, return the resul...
How to store custom objects in NSUserDefaults
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Bhargav Rao♦
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answered Feb 23 '10 at 3:45
chrissrchri...
Auto-indent in Notepad++
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Notepad++ will only auto-insert subsequent indents if you manually indent the first line in a b...
How to get the pure text without HTML element using JavaScript?
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edited Aug 3 '17 at 0:32
answered Jul 19 '11 at 8:08
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How do I access the host machine from the guest machine? [closed]
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133
On the XP machine, find your IP address by going to the command prompt and typing ipconfig. Try...
What command means “do nothing” in a conditional in Bash?
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Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
...交流则采用IPC通信的方式，后续会进行详细的介绍。
1.3．Linux进程与线程的比较
进程和线程都是任务并发处理的途径，那么它们之间到底有何区别呢，下面从几个方面分别进行比较：
进程
线程
内存空间
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一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...设备发出一个150个字节的MTU请求，但是从设备回应MTU是23字节，那么今后双方要以较小的值23字节作为以后的MTU），主从双方约定每次在做数据传输时不超过这个最大数据单元。
MTU交换通常发生在主从双方建立连接关...
What's the purpose of SQL keyword “AS”?
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There is no difference between both statements above. AS is just a more explicit way of mention...