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Running a cron job on Linux every six hours
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325
You forgot a *, and you've too many fields. It's the hour you need to care about
0 */6 * * * /p...
Regex for numbers only
...
Bill the LizardBill the Lizard
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Printing the correct number of decimal points with cout
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205
With <iomanip>, you can use std::fixed and std::setprecision
Here is an example
#include...
Adding git branch on the Bash command prompt
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Option 1: use an existing copy on your filesystem. Example (Mac OS X 10.15):
$ find / -name 'git-prompt.sh' -type f -print -quit 2>/dev/null
/Library/Developer/CommandLineTools/usr/share/git-core/git-prompt.sh
Option 2: Pull the script from GitHub.
Next, add the following line to your .bash...
Using port number in Windows host file
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195
The hosts file is for host name resolution only (on Windows as well as on Unix-like systems). Yo...
Where does forever store console.log output?
...thanks!
– AGamePlayer
Jan 9 '14 at 15:07
3
I don't see it documented - I think it changed over ti...
Set opacity of background image without affecting child elements
... {
width: 300px;
height: 200px;
background: linear-gradient(rgba(255,255,255,.5), rgba(255,255,255,.5)), url("https://i.imgur.com/xnh5x47.jpg");
}
span {
background: black;
color: white;
}
<div><span>Hello world.</span></div>
...
What is the iBeacon Bluetooth Profile
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For an iBeacon with ProximityUUID E2C56DB5-DFFB-48D2-B060-D0F5A71096E0, major 0, minor 0, and calibrated Tx Power of -59 RSSI, the transmitted BLE advertisement packet looks like this:
d6 be 89 8e 40 24 05 a2 17 6e 3d 71 02 01 1a 1a ff 4c 00 02 15 e2 c5 6d b5 d...
Ignore outliers in ggplot2 boxplot
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# compute lower and upper whiskers
ylim1 = boxplot.stats(df$y)$stats[c(1, 5)]
# scale y limits based on ylim1
p1 = p0 + coord_cartesian(ylim = ylim1*1.05)
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Get timezone from DateTime
...ing the date/time is the offset.
The support for time zones as of .NET 3.5 is a lot better than it was, but I'd really like to see a standard "ZonedDateTime" or something like that - a UTC time and an actual time zone. It's easy to build your own, but it would be nice to see it in the standard lib...