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Combine two ActiveRecord::Relation objects
...lation.or(last_name_relation)
† Only in ActiveRecord 5+; for 4.2 install the where-or backport.
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Mercurial (hg) commit only certain files
...of hg having auto-add whenever I try to commit a change it wants to commit all files. But I don't want that because certain files are not "ready" yet.
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Algorithm to compare two images
...can be used as a search object. There are probably several ways you could extract properties/data from this region of interest and use them to search your data set.
If you have more than 2 regions of interest, you can measure the distances between them. Take this simplified example:
(source: pe...
Scala Doubles, and Precision
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@RexKerr I prefer your string.format way, but in locales s.a. mine (Finnish), care must be taken to fix to ROOT locale. E.g. "%.2f".formatLocal(java.util.Locale.ROOT,x).toDouble . It seems, format uses ',' because of the locale whereas toDouble is ...
Why use apparently meaningless do-while and if-else statements in macros?
...into
if (corge)
f(corge); g(corge);
else
gralt();
which is syntactically incorrect, as the else is no longer associated with the if. It doesn't help to wrap things in curly braces within the macro, because a semicolon after the braces is syntactically incorrect.
if (corge)
{f(corge); g(co...
Changing the resolution of a VNC session in linux [closed]
...t 1600x1200 it doesn't fit on the laptop's screen, and I have to scroll it all the time.
15 Answers
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Bash function to find newest file matching pattern
... Your one liner is giving me right answer, but the "right" way is actually giving me the oldest file. Any idea why?
– NewNameStat
Apr 4 '19 at 21:59
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What is the difference between SQL Server 2012 Express versions?
...anagement Studio Express)
This package contains everything needed to install and configure SQL Server as a database server. Choose either LocalDB or Express depending on your needs above.
That's the SQLEXPRWT_x64_ENU.exe download.... (WT = with tools)
Express with Advanced Services (conta...
align right in a table cell with CSS
...xt-align: right;
}
In cases with large tables this can save you a lot of extra markup!
here's a fiddle for ya.... https://jsfiddle.net/w16c2nad/
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Why does MYSQL higher LIMIT offset slow the query down?
....com/2013/06/19/3-ways-to-optimize-for-paging-in-mysql/
It works too with strings
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