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What makes a keychain item unique (in iOS)?
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The primary keys are as follows (derived from open source files from Apple, see Schema.m4, KeySchema.m4 and SecItem.cpp):
For a key...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
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## t b a
## 1: 1 NA 1
## 2: 2 NA 4
## 3: 3 9 9
## 4: 4 16 16
## 5: 5 25 NA
## 6: 6 36 NA
# The following will give the same with the column order X,Y
X[Y[J(unique_keys)]]
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When do I need to use Begin / End Blocks and the Go keyword in SQL Server?
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MatBailieMatBailie
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Perl build, unit testing, code coverage: A complete working example
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5 Answers
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Why and How to avoid Event Handler memory leaks?
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Jon SkeetJon Skeet
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What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
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What is wchar_t?
wchar_t is defined such that any locale's char encoding can be converted to a wchar_t representation where every wc...
Using multiple delimiters in awk
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The delimiter can be a regular expression.
awk -F'[/=]' '{print $3 "\t" $5 "\t" $8}' file
Produces:
tc0001 tomcat7.1 demo.example.com
tc0001 tomcat7.2 quest.example.com
tc0001 tomcat7.5 www.example.com
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Forking vs. Branching in GitHub
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answered Aug 31 '10 at 16:59
VonCVonC
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Integer division with remainder in JavaScript?
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15 Answers
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What's the difference between => , ()=>, and Unit=>
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Call-by-Name: => Type
The => Type notation stands for call-by-name, which is one of the m...