... How do I convert CamelCase into human-readable names in Java? Regex for all strings not containing a string? A regex to match a substring that isn’t followed by a certain other substring. More examples These are attempts to come up with regex solutions to toy problems as exercises; they shou...

...es the longer form "appropriate for programming control-flow and [is] typically preferred in if clauses." So you want to use the long forms only when you are certain the vectors are length one. You should be absolutely certain your vectors are only length 1, such as in cases where they are funct...

... do you really see a difference between -L and -h ? in my bash ( version 4.2.53(1)-release (x86_64-redhat-linux-gnu ) man bash is identical for both -L and -h and they behave the same, ie they check that file actualy is a link and don'...

...Variable Values. Example: CXXFLAGS = -g3 -gdwarf2 CCFLAGS = -g3 -gdwarf2 all: executable debug: CXXFLAGS += -DDEBUG -g debug: CCFLAGS += -DDEBUG -g debug: executable executable: CommandParser.tab.o CommandParser.yy.o Command.o $(CXX) -o output CommandParser.yy.o CommandParser.tab.o Command.o...

... In general, there is a tradeoff between "precision" and "recall". High precision means that fewer irrelevant results are presented (no false positives), while high recall means that fewer relevant results are missing (no false negatives). Using the LIKE operator gives you 100% precisi...

... 2 2 # [3,] 0.3297416 1 3 From ?setcolorder: In data.table parlance, all set* functions change their input by reference. That is, no copy is made at all, other than temporary working memory, which is as large as one column. so should be pretty efficient. See ?setcolorder for details. ...

... I ever bother with GroupBy? Why should it exist? What happens when you call ToLookup on an object representing a remote database table with a billion rows in it? The billion rows are sent over the wire, and you build the lookup table locally. What happens when you call GroupBy on such an object...

...guments How the Number function handles arguments What Function.prototype.call does They're rather advanced topics in javascript, so this will be more-than-rather long. We'll start from the top. Buckle up! 1. Why not just Array(5).map? What's an array, really? A regular object, containing intege...

... There is a little difference. Object.getOwnPropertyNames(a) returns all own properties of the object a. Object.keys(a) returns all enumerable own properties. It means that if you define your object properties without making some of them enumerable: false these two methods will give you the sa...

...grated PayPal with my application for make Express checkout when I make a call for payment I'm facing this error. I use servlet for back-end process. Can any one say how to fix this issue? ...