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Why does range(start, end) not include end?
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9 Answers
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Measure the time it takes to execute a t-sql query
...d use the DATEDIFF function:
DECLARE @t1 DATETIME;
DECLARE @t2 DATETIME;
SET @t1 = GETDATE();
SELECT /* query one */ 1 ;
SET @t2 = GETDATE();
SELECT DATEDIFF(millisecond,@t1,@t2) AS elapsed_ms;
SET @t1 = GETDATE();
SELECT /* query two */ 2 ;
SET @t2 = GETDATE();
SELECT DATEDIFF(millisecond,@t1,@t...
How to check if mysql database exists
...ame';
If database with the name 'dbname' doesn't exist, you get an empty set. If it does exist, you get one row.
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Check substring exists in a string in C
I'm trying to check whether a string contains a substring in C like:
12 Answers
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Editing legend (text) labels in ggplot
...ties using the aesthetic mapping.
Here's an example using the mtcars data set and labs():
ggplot(mtcars, aes(x=mpg, y=disp, size=hp, col=as.factor(cyl), shape=as.factor(gear))) +
geom_point() +
labs(x="miles per gallon", y="displacement", size="horsepower",
col="# of cylinders", shape=...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
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函数
ApplyGrayscaleAndFade 应用灰度并淡化(组件)
对图像应用灰度效果并淡化图像。
组件：组件类型，目标图像组件
ApplyWatermark 应用水印(组件,水印文本)
在给定图像上应...
How to delete a stash created with git stash create?
Git stash seems to do a lot of what I want, except that it is a little hard to script, as the if you have no changes, then git stash; git stash pop will do something different than if you do have changes in your repository.
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How to checkout in Git by date?
I am working on a regression in the source code. I'd like to tell Git: "checkout the source based on a parameterized date/time". Is this possible?
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Why does C# disallow readonly local variables?
Having a friendly debate with a co-worker about this. We have some thoughts about this, but wondering what the SO crowd thinks about this?
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How can I set a custom date time format in Oracle SQL Developer?
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I'm using SQLDeveloper on linux and this setting doesn't work for me.. any other way?
– Filipe
Dec 19 '12 at 16:10
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