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What is difference between instantiating an object using new vs. without
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The line:
Time t (12, 0, 0);
... allocates a variable of type Time in local scope, generally on the stack, which will be destroyed when its scope ends.
By contrast:
Time* t = new Time(12, 0, 0);
... allocates a block of memory by calling eit...
alternatives to REPLACE on a text or ntext datatype
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IF your data won't overflow 4000 characters AND you're on SQL Server 2000 or compatibility level of 8 or SQL Server 2000:
UPDATE [CMS_DB_test].[dbo].[cms_HtmlText]
SET Content = CAST(REPLACE(CAST(Content as NVarchar(4000)),'ABC','DEF') AS NText)
WHERE ...
Convert to absolute value in Objective-C
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edited Jan 20 '13 at 10:47
answered Jan 17 '11 at 19:39
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Syntax for if/else condition in SCSS mixin
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edited Oct 3 '17 at 10:18
rmNyro
19311 silver badge1212 bronze badges
answered Mar 29 '11 at 5:43
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Fixing the order of facets in ggplot
...a factor in your dataframe by:
temp$size_f = factor(temp$size, levels=c('50%','100%','150%','200%'))
Then change the facet_grid(.~size) to facet_grid(.~size_f)
Then plot:
The graphs are now in the correct order.
share
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Export from sqlite to csv using shell script
...qlite.db <<!
.headers on
.mode csv
.output out.csv
select * from eS1100_sensor_results;
!
instead.
sh/bash methods
You can either call your script with a redirection:
$ your_script >out.csv
or you can insert the following as a first line in your script:
exec >out.csv
The former method...
Apply CSS styles to an element depending on its child elements
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answered Feb 24 '10 at 14:13
KP.KP.
12.2k33 gold badges3636 silver badges5959 bronze badges
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Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
...verhead for creating a thread to handle a function call is something like 10000 or more times slower than a plain function call. So, if you're issuing a lot of small function calls, a thread pool might be a good idea.
It's quite apparent that the standard C++ library that ships with g++ doesn't hav...
How does one use rescue in Ruby without the begin and end block
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answered Oct 9 '09 at 9:00
alex.zherdevalex.zherdev
22.4k88 gold badges5858 silver badges5555 bronze badges
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Does setWidth(int pixels) use dip or px?
...e independent pixel or physical pixel as unit?
For example, does setWidth(100) set the a view's width to 100 dips or 100 pxs?
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