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How to migrate back from initial migration in Django 1.7?
...lt;app> zero
This clears <app> from migration history and drops all tables of <app>
See django docs for more info.
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Get item in the list in Scala?
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Use parentheses:
data(2)
But you don't really want to do that with lists very often, since linked lists take time to traverse. If you want to index into a collection, use Vector (immutable) or ArrayBuffer (mutable) or possibly Array (which is just a Java array, exc...
Handling a colon in an element ID in a CSS selector [duplicate]
...mpatibility mode. This other answer to this same question did work. basically \3A instead of \:.
– Merlyn Morgan-Graham
Mar 30 '12 at 2:32
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select and update database record with a single queryset
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@learning well dude, it all depends on your scenario. The update method is great for mass updates, but it should set off a warning in your head when you use it that you need to review any signals attached to that object that might also need to be m...
How do I verify a method was called exactly once with Moq?
How do I verify a method was called exactly once with Moq? The Verify() vs. Verifable() thing is really confusing.
3 A...
Improve INSERT-per-second performance of SQLite
...more memory will be used for your database.
If you have indices, consider calling CREATE INDEX after doing all your inserts. This is significantly faster than creating the index and then doing your inserts.
You have to be quite careful if you have concurrent access to SQLite, as the whole database i...
Fastest sort of fixed length 6 int array
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answered May 7 '10 at 15:02
Daniel StutzbachDaniel Stutzbach
62.1k1717 gold badges7777 silver badges7575 bronze badges
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BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...B标签（设备类别） */
BLE_AD_TYPE_SM_TK = 0x10, /* 设备安全管理TK值 */
BLE_AD_TYPE_SM_OOB_FLAG = 0x11, /* 设备安全管理OOB标志 */
BLE_AD_TYPE_INT_RANGE = 0x12, /* 设备连接参数范围 */
BLE_AD_TYPE_...
PHP Regex to get youtube video ID?
...y are very easy to make an error in, so if there are PHP functions specifically for what you are trying to accomplish, use those.)
parse_url takes a string and cuts it up into an array that has a bunch of info. You can work with this array, or you can specify the one item you want as a second argum...
Setting Windows PowerShell environment variables
...t finds in the WindowsPowerShell directory under
My Documents folder. Typically you have a profile.ps1
file already there. The path on my computer is
C:\Users\JaredPar\Documents\WindowsPowerShell\profile.ps1
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