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MySQL vs MongoDB 1000 reads
...ve been testing it lately. I had a table called posts in MySQL with about 20 million records indexed only on a field called 'id'.
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Is it safe to assume a GUID will always be unique?
...ow there is a minute possibility of a clash but if I generated a batch of 1000 GUIDs (for example), would it be safe to assume they're all unique to save testing each one?
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'transform3d' not working with position: fixed children
...ances, a fixed div would be positioned exactly where it is specified ( top:0px , left:0px ).
10 Answers
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How to get the command line args passed to a running process on unix/linux systems?
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310
There are several options:
ps -fp <pid>
cat /proc/<pid>/cmdline | sed -e "s/\x00/ /...
How to increase the execution timeout in php?
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130
You need to change some setting in your php.ini:
upload_max_filesize = 2M
;or whatever size yo...
界面布局组件 · App Inventor 2 中文网
...度 属性设置为自动且其中没有任何组件，则 高度 将是 100%。
如果水平布局的 宽度 属性设置为自动，则实际布局的宽度由组件的宽度之和确定。
如果一个 水平布局 的 宽度 属性设置为 自动，任何组件宽度 属性...
How to detect responsive breakpoints of Twitter Bootstrap 3 using JavaScript?
... Bootstrap 3 have the following responsive breakpoints: 768px, 992px and 1200px, representing small, medium and large devices respectively.
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How to avoid Python/Pandas creating an index in a saved csv?
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edited Aug 16 '18 at 20:31
ayhan
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answe...
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
...L(Cassandra, HBase, MongoDB)。
注：NoSQL的实现在mahout-integration-0.8.jar中。
数据格式支持2种：
GenericDataModel: 用户ID，物品ID，用户对物品的打分(UserID,ItemID,PreferenceValue)
GenericBooleanPrefDataModel: 用户ID，物品ID (UserID,ItemID)，这种方式表...
VBA - how to conditionally skip a for loop iteration
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answered Dec 30 '11 at 15:02
BrianBrian
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