大约有 12,000 项符合查询结果（耗时：0.0297秒） [XML]
Immutable vs Mutable types
...ou agree strings are immutable right? But you can do the same thing.
s = 'foo'
s += 'bar'
print s # foobar
The value of the variable changes, but it changes by changing what the variable refers to. A mutable type can change that way, and it can also change "in place".
Here is the difference.
x ...
Git cherry pick vs rebase
...versions of Git; at present time you can do something like git cherry-pick foo~3..foo and get the tree top commits from "foo" picked one by one.
– kostix
Aug 6 '12 at 23:29
...
Iterate through options
...L Code
<select id="mySelectionBox">
<option value="hello">Foo</option>
<option value="hello1">Foo1</option>
<option value="hello2">Foo2</option>
<option value="hello3">Foo3</option>
</select>
You JQuery Code
$("#mySelect...
How to create an array containing 1…N
...ater loop through.
If this is all you need, can you do this instead?
var foo = new Array(45); // create an empty array with length 45
then when you want to use it... (un-optimized, just for example)
for(var i = 0; i < foo.length; i++){
document.write('Item: ' + (i + 1) + ' of ' + foo.lengt...
What is the point of noreturn?
...atsoever - you know it already. So the following is sound:
(void)5;
(void)foo(17); // whatever foo(17) does
But the assignment below is not:
void raise();
void f(int y) {
int x = y!=0 ? 100/y : raise(); // raise() returns void, so what should x be?
cout << x << endl;
}
[[no...
AssertContains on strings in jUnit
...
If you add in Hamcrest and JUnit4, you could do:
String x = "foo bar";
Assert.assertThat(x, CoreMatchers.containsString("foo"));
With some static imports, it looks a lot better:
assertThat(x, containsString("foo"));
The static imports needed would be:
import static org.junit.Asse...
How do you run a single test/spec file in RSpec?
...or example, if you had a spec like:
1:
2: it "should be awesome" do
3: foo = 3
4: foo.should eq(3)
5: end
6:
Let's say it's saved in spec/models/foo_spec.rb. Then you would run:
rspec spec/models/foo_spec.rb:2
and it would just run that one spec. In fact, that number could be anything f...
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
...
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 ...
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...