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Difference between std::system_clock and std::steady_clock?
...11.7.1 [time.clock.system]/1:
Objects of class system_clock represent wall clock time from the system-wide realtime clock.
20.11.7.2 [time.clock.steady]/1:
Objects of class steady_clock represent clocks for which values of time_point never decrease as physical time advances and for which v...
When does a process get SIGABRT (signal 6)?
...
10 Answers
10
Active
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Add legend to ggplot2 line plot
...range your data frame
library(reshape2)
dd = melt(dd_sub, id=c("fecha"))
All that's left is a simple ggplot command:
ggplot(dd) + geom_line(aes(x=fecha, y=value, colour=variable)) +
scale_colour_manual(values=c("red","green","blue"))
Example plot
...
getting the screen density programmatically in android?
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Ωmega
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answered Jul 2 '10 at 14:26
joshperryjoshperry
...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...。
首先，介绍环境。
数据库A和数据库B的版本为Oracle 10.2.0.4 for linux x86 64bit。
在数据库A上同步的表的结构如下：
create table T_MV_TEST
(
A DATE,
B DATE,
C DATE
);
alter table T_MV_TEST
add constraint PK_T_MV_TEST primary key (A,B);
这...
How to play ringtone/alarm sound in Android
...tem/alarm_alert
– Pritesh Desai
Feb 10 '13 at 19:19
3
Nice and simple. However, depending on the ...
Sorting an array of objects in Ruby by object attribute?
...;:attribute
– jasin_89
Aug 6 '13 at 10:28
1
If you have problems with uppercase & lowercase l...
Link to add to Google calendar
.../www.example.com&location=Waldorf+Astoria,+301+Park+Ave+,+New+York,+NY+10022&sf=true&output=xml
Note the key query parameters:
text
dates
details
location
Here's another example (taken from http://wordpress.org/support/topic/direct-link-to-add-specific-google-calendar-event):
<a ...
How to use putExtra() and getExtra() for string data
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answered Mar 10 '11 at 21:11
Will TateWill Tate
32.2k99 gold badges7373 silver badges7171 bronze badges
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unix - head AND tail of file
Say you have a txt file, what is the command to view the top 10 lines and bottom 10 lines of file simultaneously?
20 Answer...