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What is the rationale for all comparisons returning false for IEEE754 NaN values?
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All empty sets are equal, by definition.
– MSalters
Oct 14 '09 at 9:51
29
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How to check if a database exists in SQL Server?
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From a Microsoft's script:
DECLARE @dbname nvarchar(128)
SET @dbname = N'Senna'
IF (EXISTS (SELECT name
FROM master.dbo.sysdatabases
WHERE ('[' + name + ']' = @dbname
OR name = @dbname)))
-- code mine :)
PRINT 'db exists'
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How to select the rows with maximum values in each group with dplyr? [duplicate]
I would like to select a row with maximum value in each group with dplyr.
6 Answers
6
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Filtering DataGridView without changing datasource
...rk for 3 types of datagridview datasources: DataTable, DataBinding and DataSet.
My problem is with filtering DataTable from DataSet object, which is displayed on DataGridView.
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NSIS脚本编程(持续更新) - 脚本技术 - 清泛IT论坛，有思想、有深度
本帖最后由 zqp2013 于 2014-12-31 14:18 编辑
NSIS MessageBox 中无法换行？
NSIS中 $ 不但是变量常量的开头，还是一个转义字符，因此换行符应该$\n。
messagebox::show MB_SETFOREGROUND|MB_ICONHAND|MB_DEFBUTTON3|MB_TOPMOST "" "" \ &nbs...
What's the state of the art in email validation for Rails?
What are you using to validate users' email addresses, and why?
13 Answers
13
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Gradient borders
...adients as border image:
-webkit-border-image: -webkit-gradient(linear, left top, left bottom, from(#00abeb), to(#fff), color-stop(0.5, #fff), color-stop(0.5, #66cc00)) 21 30 30 21 repeat repeat;
Prooflink -- http://www.webkit.org/blog/1424/css3-gradients/
Browser support: http://caniuse.com/#sea...
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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VIM Replace word with contents of paste buffer?
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"This allows for change paste motion cp{motion}
nmap <silent> cp :set opfunc=ChangePaste<CR>g@
function! ChangePaste(type, ...)
silent exe "normal! `[v`]\"_c"
silent exe "normal! p"
endfunction
share
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typedef fixed length array
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