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Storing a Map using JPA
...sing MariaDB, I ran into Specified key was too long; max key length is 767 bytes doing this. The primary key it tries to create is a combination of the varchar(255) and the @JoinColumn, which exceeds the default column size. You need to either change your database or modify your @MapKeyColumn to pro...
How to clear MemoryCache?
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@LaustN can you elaborate on the "grief" caused by MemoryCache.Default? I'm currently using MemoryCache.Default... MSDN's MemoryCache documentation makes me wonder if disposing and recreating is recommended: "Do not create MemoryCache instances unless it is required. If yo...
jQuery Multiple ID selectors
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what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
...ering what is the best way to convert a json formatted key value pair to ruby hash with symbol as key:
example:
7 Answers
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Convert an enum to List
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Choice between vector::resize() and vector::reserve()
..._back() new elements to it, the size() of the vector will further increase by allocating new memory (which also means moving the existing elements to the newly allocated memory space). If you have used reserve() at the start to ensure there is already enough allocated memory, the size() of the vecto...
Create a variable name with “paste” in R?
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Proper use of the HsOpenSSL API to implement a TLS Server
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Why does String.split need pipe delimiter to be escaped?
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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...ink LayerLink Layer用于控制设备的射频状态，设备将处于Standby（待机）、Advertising（通告）、Scanning（扫描）、Initiating（初始化）、Connection（连接）这五种状态中的一种。
待机状态（Standby State）：此时即不发送数据，也不接...