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In Bash, how to add “Are you sure [Y/n]” to any command or alias?
...f course, this will be set as an alias, like hgpushrepo
Example:
$ echo foo | xargs -p ls -l
ls -l foo?...y
-rw-r--r-- 1 mikelee staff 0 Nov 23 10:38 foo
$ echo foo | xargs -p ls -l
ls -l foo?...n
$
share
...
What is the purpose of “&&” in a shell command?
...g
commands write solely bar to standard output:
$ false && echo foo || echo bar
$ true || echo foo && echo bar
In the first case, the false is a command that exits with the status of 1
$ false
$ echo $?
1
which means echo foo does not run (i.e., shortcircuiting echo foo). T...
Proper indentation for Python multiline strings
...
You probably want to line up with the """
def foo():
string = """line one
line two
line three"""
Since the newlines and spaces are included in the string itself, you will have to postprocess it. If you don't want to do that and you have a ...
Named string formatting in C#
...built-in method for handling this.
Here's one method
string myString = "{foo} is {bar} and {yadi} is {yada}".Inject(o);
Here's another
Status.Text = "{UserName} last logged in at {LastLoginDate}".FormatWith(user);
A third improved method partially based on the two above, from Phil Haack
...
Double Iteration in List Comprehension
...m counter-intuitive.
Take for example: [str(x) for i in range(3) for x in foo(i)]
Let's decompose it:
def foo(i):
return i, i + 0.5
[str(x)
for i in range(3)
for x in foo(i)
]
# is same as
for i in range(3):
for x in foo(i):
yield str(x)
...
Is it possible to declare a variable in Gradle usable in Java?
...id {
buildTypes {
debug {
buildConfigField "int", "FOO", "42"
buildConfigField "String", "FOO_STRING", "\"foo\""
buildConfigField "boolean", "LOG", "true"
}
release {
buildConfigField "int", "FOO", "52"
buildCon...
Should we pass a shared_ptr by reference or by value?
...
I ran the code below, once with foo taking the shared_ptr by const& and again with foo taking the shared_ptr by value.
void foo(const std::shared_ptr<int>& p)
{
static int x = 0;
*p = ++x;
}
int main()
{
auto p = std::make_shared...
Difference between single and double quotes in Bash
...page). To test this out, try PS1='$X'. You will have no prompt. Then run X=foo and suddenly your prompt is "foo" (had PS1 been evaluated when set instead of displayed you would still have no prompt).
– Adam Batkin
Mar 4 '19 at 2:08
...
Constructor function vs Factory functions
...ctors and new
this refers to the new object
Some people like the way var myFoo = new Foo(); reads.
Drawbacks
Details of instantiation get leaked into the calling API (via the new requirement), so all callers are tightly coupled to the constructor implementation. If you ever need the additional f...
what is reverse() in Django
...ation
Let's suppose that in your urls.py you have defined this:
url(r'^foo$', some_view, name='url_name'),
In a template you can then refer to this url as:
<!-- django <= 1.4 -->
<a href="{% url url_name %}">link which calls some_view</a>
<!-- django >= 1.5 or with...