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How do I use arrays in C++?
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Might be worth it to add a note that even tho in void foo(int a[3]) a does look like one is passing the array by value, modifying a inside of foo will modify the original array. This should be clear because arrays cannot be copied, but it might be worth it to reinforce that.
...
How to set child process' environment variable in Makefile
...st pointed out, you can export individual variables with:
export MY_VAR = foo # Available for all targets
Or export variables for a specific target (target-specific variables):
my-target: export MY_VAR_1 = foo
my-target: export MY_VAR_2 = bar
my-target: export MY_VAR_3 = baz
my-target: depende...
How do you tell someone they're writing bad code? [closed]
...s better than cutting & pasting.
Explain why an array is better than $foo1, $foo2, $foo3.
Explain why global variables are dangerous, and that local variables will make life easier.
Simply whipping out a coding standard and saying "do this" is worthless because it doesn't explain to the progr...
How can I see the assembly code for a C++ program?
...ly listing, and -ah adds "high-level source" listing):
g++ -g -c -Wa,-alh foo.cc
For Visual Studio, use /FAsc.
Peek into the binary
If you have compiled binary,
use objdump -d a.out on UNIX (also works for cygwin),
dumpbin /DISASM foo.exe on Windows.
Use your debugger
Debuggers could also...
NULL vs nullptr (Why was it replaced?) [duplicate]
...mbiguity in overloaded function resolution, among other things:
f(int);
f(foo *);
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...ssion.
Note that we can merge in with literal notation as well:
z = {**x, 'foo': 1, 'bar': 2, **y}
and now:
>>> z
{'a': 1, 'b': 3, 'foo': 1, 'bar': 2, 'c': 4}
It is now showing as implemented in the release schedule for 3.5, PEP 478, and it has now made its way into What's New in Python 3...
when I run mockito test occurs WrongTypeOfReturnValue Exception
...mgroups#!topic/mockito/9WUvkhZUy90, you should rephrase your
when(bar.getFoo()).thenReturn(fooBar)
to
doReturn(fooBar).when(bar).getFoo()
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How do I call one constructor from another in Java?
...
Yes, it is possible:
public class Foo {
private int x;
public Foo() {
this(1);
}
public Foo(int x) {
this.x = x;
}
}
To chain to a particular superclass constructor instead of one in the same class, use super instead of...
R: Comment out block of code [duplicate]
...just put # signs in front of every line (possibly with editor shortcuts).
foo <- scan(what="character")
These are comments
These are still comments
Can also be code:
x <- 1:10
One line must be blank
rm(foo)
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How to drop columns by name in a data frame
...t) %in% c("z","u"))] ## works as expected
dat[ , -which(names(dat) %in% c("foo","bar"))] ## deletes all columns! Probably not what you wanted...
Instead use subset or the ! function:
dat[ , !names(dat) %in% c("z","u")] ## works as expected
dat[ , !names(dat) %in% c("foo","bar")] ## returns the un...