Returns true if stat is readable by the real user id of this process.
File.stat("testfile").readable_real? #=> true
If stat is writable by others, returns an integer representing the file permission bits of stat. Returns nil otherwise. The meaning of the bits is platform dependent; on Unix systems, see stat(2).
m = File.stat("/tmp").world_writable? #=> 511 sprintf("%o", m) #=> "777"
Iterates over keys and objects in a weakly referenced object
The default value for specification attribute name
Duplicates array_attributes from other_spec so state isn’t shared.
Checks that dependencies use requirements as we recommend. Warnings are issued when dependencies are open-ended or overly strict for semantic versioning.
Checks to see if the files to be packaged are world-readable.
The mixed mode default is to treat a list of indices as row access, returning the rows indicated. Anything else is considered columnar access. For columnar access, the return set has an Array for each row with the values indicated by the headers in each Array. You can force column or row mode using by_col!() or by_row!().
You cannot mix column and row access.
Returns the block diagonal eigenvalue matrix D