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How do I list the functions defined in my shell?
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declare -F
Function names and definitions may be listed with the -f option to the
declare builtin command (see Bash Builtins). The -F option to declare
will list the function names only
(and optionally the source file and line number).
Bash Re...
Read file line by line using ifstream in C++
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#include <fstream>
std::ifstream infile("thefile.txt");
The two standard methods are:
Assume that every line consists of two numbers and read token by token:
int a, b;
while (infile >> a >> b)
{
// process pair (a,b)
}
Line-based parsing, using string streams:
#include ...
Convert char to int in C and C++
How do I convert a char to an int in C and C++?
12 Answers
12
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Write a program that will surely go into deadlock [closed]
...Here's an example in C#. Note that the program appears to contain no locks and no shared data. It has only a single local variable and three statements, and yet it deadlocks with 100% certainty. One would be hard-pressed to come up with a simpler program that deadlocks with certainty.
Exercise to t...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...returning an Integer object, which may have its values cached between -128 and 127. This is why the first value returns true - it's cached - and the second value returns false - 128 isn't a cached value, so you're getting two separate Integer instances.
It is important to note that you are compari...
Reshaping data.frame from wide to long format
...alues (as a result of the , in the numbers). You can repair that with gsub and as.numeric:
long$value <- as.numeric(gsub(",", "", long$value))
Or directly with data.table or dplyr:
# data.table
long <- melt(setDT(wide),
id.vars = c("Code","Country"),
variable.name...
What is the difference between JSON and Object Literal Notation?
...nce between a JavaScript object defined by using Object Literal Notation and JSON object ?
10 Answers
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Should I use 'border: none' or 'border: 0'?
Which of the two methods conforms to W3C standards? Do they both behave as expected across browsers?
13 Answers
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How to mock an import
.... However under test conditions I'd like to mock B in A (mock A.B ) and completely refrain from importing B .
8 An...
How to use conditional breakpoint in Eclipse?
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Put your breakpoint.
Right-click the breakpoint image on the margin and choose Breakpoint Properties:
Configure condition as you see fit:
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