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Can you have if-then-else logic in SQL? [duplicate]
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You can make the following sql query
IF ((SELECT COUNT(*) FROM table1 WHERE project = 1) >...
Checking images for similarity with OpenCV
...lue (maybe a percentage) that indicates how similar these images are? E.g. 100% would be returned if the same image was passed twice, 0% would be returned if the images were totally different.
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getting the screen density programmatically in android?
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use Winmerge inside of Git to file diff
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Update June 2015, 6 years later:
As detailed in "git mergetool winmerge", a simple git config...
Best way to merge two maps and sum the values of same key?
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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...命令可以登录主节点使用
db.adminCommand({replSetStepDown : 1})
如果杀不掉可以使用强制开关
db.adminCommand({replSetStepDown : 1, force : true})
或者使用 rs.stepDown(120)也可以达到同样的效果，中间的数字指不能在停止服务这段时间成...
Passing parameters to JavaScript files
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bash/fish command to print absolute path to a file
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Use realpath
$ realpath example.txt
/home/username/example.txt
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jQuery attr vs prop?
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Unfortunately none of your links work :(
Some insight though, attr is for all attributes. prop i...
CSS3 Transparency + Gradient
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edited Jun 16 '12 at 16:08
umassthrower
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