大约有 6,261 项符合查询结果（耗时：0.0155秒） [XML]
How do I run a batch script from within a batch script?
...ar.bat that says echo This is bar.bat! and you want to call it from a file foo.bat, you can write this in foo.bat:
if "%1"=="blah" bar
Run foo blah from the command line, and you'll see:
C:\>foo blah
C:\>if "blah" == "blah" bar
C:\>echo This is bar.bat!
This is bar.bat!
But beware: ...
How do I pass a method as a parameter in Python
...
Yes it is possible. Just call it:
class Foo(object):
def method1(self):
pass
def method2(self, method):
return method()
foo = Foo()
foo.method2(foo.method1)
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How can I write a heredoc to a file in Bash script?
...se single quotes:
cat << 'EOF' > /tmp/yourfilehere
The variable $FOO will not be interpreted.
EOF
To pipe the heredoc through a command pipeline:
cat <<'EOF' | sed 's/a/b/'
foo
bar
baz
EOF
Output:
foo
bbr
bbz
... or to write the the heredoc to a file using sudo:
cat <<...
Syntax for a single-line Bash infinite while loop
...
while true; do foo; sleep 2; done
By the way, if you type it as a multiline (as you are showing) at the command prompt and then call the history with arrow up, you will get it on a single line, correctly punctuated.
$ while true
> do
...
How can I call controller/view helper methods from the console in Ruby on Rails?
...r log in page, something like: app.post '/session/new', { :username => "foo", :password => "pass" }. And then continue to use the same "app" variable to get pages after that.
– Nick
Mar 7 '13 at 18:15
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How to expand a list to function arguments in Python [duplicate]
... the documentation as "Unpacking argument lists".
You'd use it like this: foo(*values). There's also one for dictionaries:
d = {'a': 1, 'b': 2}
def foo(a, b):
pass
foo(**d)
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What does the 'u' symbol mean in front of string values? [duplicate]
...on Python 2.
You can create a Unicode string multiple ways:
>>> u'foo'
u'foo'
>>> unicode('foo') # Python 2 only
u'foo'
But the real reason is to represent something like this (translation here):
>>> val = u'Ознакомьтесь с документацией'
>>...
slim dynamic conditional class [closed]
...have multiple conditions I am doing right now something like
div class=(('foo ' if is_foo?) + ('bar' if is_bar?))
Though I feel it to be a blemish if is_bar? return false and the generated HTML results in
<div class="foo "></div>
(the blemish is the blank character after the foo). ...
How do JavaScript closures work?
...closure with the lexical environment of the execution context created when foo is invoked, closing over variable secret:
function foo() {
const secret = Math.trunc(Math.random()*100)
return function inner() {
console.log(`The secret number is ${secret}.`)
}
}
const f = foo() // `secret...
How do I parse XML in Python?
...like:
for type_tag in root.findall('bar/type'):
value = type_tag.get('foobar')
print(value)
And similar, usually pretty simple, code patterns.
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