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What is an undefined reference/unresolved external symbol error and how do I fix it?
... the syntax rules of translation is specified by the following phases [see footnote].
Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set
(introducing new-line characters for end-of-line indicators) if
necessary. [SNIP]
Each instance of...
How to count lines in a document?
...u can also use it to count lines in a file by adding the -l option.
wc -l foo will count the number of lines in foo. You can also pipe output from a program like this: ls -l | wc -l, which will tell you how many files are in the current directory (plus one).
...
How to delete multiple buffers in Vim?
...
I've just checked with c:/Program files/foo.bar, and even foo.bar.foo and it worked perfectly. fnameescape() may have been required if I used the buffer names. But I'm only checking whether the buffer names match a given expression: \.{ext}$ -- I give buffer number...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
...ntation.
The *args will give you all function parameters as a tuple:
def foo(*args):
for a in args:
print(a)
foo(1)
# 1
foo(1,2,3)
# 1
# 2
# 3
The **kwargs will give you all
keyword arguments except for those corresponding to a formal parameter as a dictionary.
def bar(**...
In Bash, how do I add a string after each line in a file?
...
Pure POSIX shell and sponge:
suffix=foobar
while read l ; do printf '%s\n' "$l" "${suffix}" ; done < file |
sponge file
xargs and printf:
suffix=foobar
xargs -L 1 printf "%s${suffix}\n" < file | sponge file
Using join:
suffix=foobar
join file file -e...
How do I add the contents of an iterable to a set?
...
You can add elements of a list to a set like this:
>>> foo = set(range(0, 4))
>>> foo
set([0, 1, 2, 3])
>>> foo.update(range(2, 6))
>>> foo
set([0, 1, 2, 3, 4, 5])
share
...
Remove .php extension with .htaccess
...er). These rewrites can be as simple as internally translating example.com/foo into a request for example.com/foo/bar.
The Apache docs include a mod_rewrite guide and I think some of the things you want to do are covered in it. Detailed mod_rewrite guide.
Force the www subdomain
I would like i...
What is the scope of variables in JavaScript?
...nction expressions are scoped only to the expression itself:
(function foo() { console.log(foo) })()
console.log(typeof foo) // undefined, because `foo` is scoped to its own expression
In non-strict mode, implicitly defined properties on the global object are globally scoped. In strict mod...
Difference between `set`, `setq`, and `setf` in Common Lisp?
...TF, just the SET function.
What is now written as:
(setf (symbol-value '*foo*) 42)
was written as:
(set (quote *foo*) 42)
which was eventually abbreviavated to SETQ (SET Quoted):
(setq *foo* 42)
Then lexical variables happened, and SETQ came to be used for assignment to them too -- so it w...
What is the difference between char s[] and char *s?
...
First off, in function arguments, they are exactly equivalent:
void foo(char *x);
void foo(char x[]); // exactly the same in all respects
In other contexts, char * allocates a pointer, while char [] allocates an array. Where does the string go in the former case, you ask? The compiler secre...