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MySQL: how to get the difference between two timestamps in seconds
...unction returns the internal timestamp value directly, with no implicit “string-to-Unix-timestamp” conversion.
Keep in mind that TIMEDIFF() return data type of TIME. TIME values may range from '-838:59:59' to '838:59:59' (roughly 34.96 days)
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Use space as a delimiter with cut command
...pplications to specify the option and option-argument in the same argument string without intervening characters.
In other words: In this case, because -d's option-argument is mandatory, you can choose whether to specify the delimiter as:
(s) EITHER: a separate argument
(d) OR: as a value dire...
How can I match multiple occurrences with a regex in JavaScript similar to PHP's preg_match_all()?
I am trying to parse url-encoded strings that are made up of key=value pairs separated by either & or & .
1...
versionCode vs versionName in Android Manifest
...me
The version name shown to users. This attribute can be set as a raw string or as a reference to a string resource. The string has no other purpose than to be displayed to users. The versionCode attribute holds the significant version number used internally.
Reading that it's pretty clear th...
How can I negate the return-value of a process?
...ns:
!(p4 labels | grep GIT_TAG_ON_A_BRANCH)
to check that the given string is not printed by 'p4 labels'.
This is problematic, because according to POSIX:
"If the pipeline begins with the reserved word ! and command1 is a subshell command, the application shall ensure that the ( o...
Microsoft Web API: How do you do a Server.MapPath?
...other concerns into a bigger toolbelt / utility interface) with the method string MapPath(string virtualPath). Only the concrete implementation for your WebApi IPathMapper needs to know about System.Web.Hosting.HostingEnvironment
– StuartLC
Jun 3 '15 at 14:05
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SQLite with encryption/password protection
...word("new_password");
To reset or remove password, use conn.ChangePassword(String.Empty);
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varbinary to string on SQL Server
...mean different things.
If the varbinary is the binary representation of a string in SQL Server (for example returned by casting to varbinary directly or from the DecryptByPassPhrase or DECOMPRESS functions) you can just CAST it
declare @b varbinary(max)
set @b = 0x5468697320697320612074657374
sel...
How can I manipulate the strip text of facet_grid plots?
...it in a way that makes sense.
Typically if I have a dataset$variable with strings that looks like
c("median_something", "aggregated_average_x","error","something_else")
I simply do:
reformat <– function(x,lab="\n"){ sapply(x, function(c){ paste(unlist(strsplit(as.character(c) , split="_")...
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...strptime can handle seconds since epoch. The number must be converted to a string:
require 'date'
DateTime.strptime("1318996912",'%s')
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