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Simple way to calculate median with MySQL
...um+1 as `row_number`, @total_rows:=@rownum
FROM data d, (SELECT @rownum:=0) r
WHERE d.val is NOT NULL
-- put some where clause here
ORDER BY d.val
) as dd
WHERE dd.row_number IN ( FLOOR((@total_rows+1)/2), FLOOR((@total_rows+2)/2) );
Steve Cohen points out, that after the first pass, @rown...
When to use an object instance variable versus passing an argument to the method
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answered Dec 6 '08 at 10:45
TomTom
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Ruby custom error classes: inheritance of the message attribute
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StefanStefan
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Get HTML5 localStorage keys
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in ES2017 you can use:
Object.entries(localStorage)
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How to get the absolute coordinates of a view
...as they all seem to be relative to the parent of the view, thus giving me 0 . What is the proper way to do this?
11 Answer...
地图组件（高德地图） · App Inventor 2 中文网
...应一个特定的URL。
默认高德地图简图模式：https://wprd01.is.autonavi.com/appmaptile?x={x}&y={y}&z={z}&style=7
可调整地图样式，变量说明如下：
域名前缀(wprd,webst)：效果一样，目前还没有找出规律。01 ~ 04 随意都可以，负载均衡用。
lang...
Understanding Canvas and Surface concepts
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SabeehSabeeh
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Is there a function that returns the current class/method name? [duplicate]
...e.Name;
– James Furey
Oct 17 '12 at 0:44
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What do to with respect to the "Possible System.NullRe...
Does PostgreSQL support “accent insensitive” collations?
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208
Use the unaccent module for that - which is completely different from what you are linking to.
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How to get process ID of background process?
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605
You need to save the PID of the background process at the time you start it:
foo &
FOO_PID...