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range() for floats
...esented are based on iterating over integers and deriving the final floats from the integers. This is more robust. If you do it directly with floats, you risk having strange one-off errors due to how floats are represented internally. For instance, if you try list(frange(0, 1, 0.5)), it works fine a...
Can git operate in “silent mode”?
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@HansKrisian yes, bash brought interactive features from csh and the scripting from sh together. Quoting from the same howto: "Bash is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh)".
– hd1
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Making a request to a RESTful API using python
...index a corpus of content. I can query the search by running the following from my terminal (MacOSX):
4 Answers
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Align button at the bottom of div using CSS
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When using position:absolute; the element will be positioned absolutely from the first positioned parent div, if it can't find one it will position absolutely from the window so you will need to make sure the content div is positioned.
To make the content div positioned, all position values that...
Where can I learn how to write C code to speed up slow R functions? [closed]
...y efficient) C code one can study, and CRAN has hundreds of packages, some from authors you trust. That provides real, tested examples to study and adapt.
But as Josh suspected, I lean more towards C++ and hence Rcpp. It also has plenty of examples.
Edit: There were two books I found helpful:
T...
Unable to load config info from /usr/local/ssl/openssl.cnf on Windows
...NSSL_CONF = "${env:ProgramFiles}\OpenSSL\openssl.cnf"
This value differs from previous installation versions (as seen in a previous edit of this post). Also, don't forget to add the openssl binary folder ${env:ProgramFiles}\OpenSSL to your Path.
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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 keychain item of class kSecClassGenericPassword, the primary key is the combination of
kSecAttrAccount and kSecAttrService.
For a keych...
How to exit a function in bash
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Use:
return [n]
From help return
return: return [n]
Return from a shell function.
Causes a function or sourced script to exit with the return value
specified by N. If N is omitted, the return status is that of the
last command executed wi...
memory_get_peak_usage() with “real usage”
... to true the PHP DOCS say it will get the real size of memory allocated from system. If it's false it will get the memory reported by emalloc()
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#define macro for debug printing in C?
...ebugging. Several times, having the printing always validated has saved me from later problems.
I use NDEBUG to control assertions only, and a separate macro (usually DEBUG) to control whether debug tracing is built into the program. Even when the debug tracing is built in, I frequently do not want...