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How to Create Deterministic Guids
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As mentioned by @bacar, RFC 4122 §4.3 defines a way to create a name-based UUID. The advantage of doing this (over just using a MD5 hash) is that these are guaranteed not to collide with non-named-based UUIDs, and have a very (very)...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...pulled from separate files and not all factor levels appear in each file.
One way to address this is to create a custom manual colour scale as follows:
#Some test data
dat <- data.frame(x=runif(10),y=runif(10),
grp = rep(LETTERS[1:5],each = 2),stringsAsFactors = TRUE)
#Create a custom ...
Java 8 NullPointerException in Collectors.toMap
The Java 8 Collectors.toMap throws a NullPointerException if one of the values is 'null'. I don't understand this behaviour, maps can contain null pointers as value without any problems. Is there a good reason why values cannot be null for Collectors.toMap ?
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Google Maps API - Get Coordinates of address
... Toronto Street, Toronto, ON, they returned different postal codes and the one returned by the Google Maps API is the same as the one that the search on Canada Post's website returns. I tested it with two other addresses too and there were discrepancies again.
– Nikolay D
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“The run destination iOS Device is not valid for running the scheme”
I've been running my app on an iPhone 5 /iOS 6, but when I try to run it on an iPhone 4S / iOS6 I get "The run destination iOS Device is not valid for running the scheme NN. The Scheme contains no buildables that can be built for the architectures supported by the run designation device".
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How do I convert NSInteger to NSString datatype?
How does one convert NSInteger to the NSString datatype?
9 Answers
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How do I add more members to my ENUM-type column in MySQL?
...ohn depends. For MariaDB, adding new values at the end of the enum can be done inplace since 10.3.7: mariadb.com/kb/en/library/…
– Felipe Philipp
Sep 18 '19 at 8:17
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How do I list all versions of a gem available at a remote site?
... Also note that "rhc" is a regex, so if you only want to look at that one, you could search for gem list ^rhc$ and the "--remote" and "--all" flags can be abbreviated and combined for gem list ^rhc$ -ra
– Joshua Cheek
Feb 5 '12 at 4:19
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How to validate an email address using a regular expression?
...tood if studied for a few minutes and is efficient enough for actual use.
One RFC 5322 compliant regex can be found at the top of the page at http://emailregex.com/ but uses the IP address pattern that is floating around the internet with a bug that allows 00 for any of the unsigned byte decimal va...
Best branching strategy when doing continuous integration?
...is developed on a separate branch, with task sub-branches for each change done by individual developer. As features stabilize they get merged to trunk, which you keep reasonably stable and passing all regression tests at all times. As you near the end of your release cycle and all feature branches m...