大约有 7,000 项符合查询结果（耗时：0.0366秒） [XML]
Why does Pycharm's inspector complain about “d = {}”?
...o initialize dictionaries with single operation
d = {
'a': 12,
'b': 'foo',
'c': 'bar'
}
instead of many lines like
d = dict()
d['a'] = 12
d['b'] = ....
in the end I ended up with this:
d = dict()
d.update({
'a': 12,
'b': 'foo',
'c': 'bar'
})
Pycharm is not complaining on this
...
Package objects
...when you use the API defined by the package. Here is an example:
// file: foo/bar/package.scala
package foo
package object bar {
// package wide constants:
def BarVersionString = "1.0"
// or type aliases
type StringMap[+T] = Map[String,T]
// can be used to emulate a package wide impo...
Checking for NULL pointer in C/C++ [closed]
...
if (foo) is clear enough. Use it.
share
|
improve this answer
|
follow
|
...
A python class that acts like dict
...ode__(self):
return unicode(repr(self.__dict__))
o = Mapping()
o.foo = "bar"
o['lumberjack'] = 'foo'
o.update({'a': 'b'}, c=44)
print 'lumberjack' in o
print o
In [187]: run mapping.py
True
{'a': 'b', 'lumberjack': 'foo', 'foo': 'bar', 'c': 44}
...
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
..." is a string
1 == "1": true // "1" gets casted to an integer, which is 1
"foo" === "foo": true // both operands are strings and have the same value
Warning: two instances of the same class with equivalent members do NOT match the === operator. Example:
$a = new stdClass();
$a->foo = "bar";
$b ...
How to print to stderr in Python?
...; print("Test")
Test
>>> eprint("Test")
Test
>>> eprint("foo", "bar", "baz", sep="---")
foo---bar---baz
share
|
improve this answer
|
follow
...
MVC Razor view nested foreach's model
...='SomeProperty'>.
For a more complicated example, like model=>model.Foo.Bar.Baz.FooBar, it might generate <input name="Foo.Bar.Baz.FooBar" value="[whatever FooBar is]" />
Make sense? It is not just the work that the Func<> does, but how it does its work is important here.
(Note ...
Passing parameters to a Bash function
... you need to call your function after it is declared.
#!/usr/bin/env sh
foo 1 # this will fail because foo has not been declared yet.
foo() {
echo "Parameter #1 is $1"
}
foo 2 # this will work.
Output:
./myScript.sh: line 2: foo: command not found
Parameter #1 is 2
Reference: Advanced...
Preserve line endings
...is will fix the problem with cygwin's sed on Windows.
Example: sed -b 's/foo/bar/'
If you wish to match the end of the line, remember to match, capture and copy the optional carriage return.
Example: sed -b 's/foo\(\r\?\)$/bar\1/'
From the sed man page:
-b --binary
This opti...
How can I use xargs to copy files that have spaces and quotes in their names?
...
You can combine all of that into a single find command:
find . -iname "*foobar*" -exec cp -- "{}" ~/foo/bar \;
This will handle filenames and directories with spaces in them. You can use -name to get case-sensitive results.
Note: The -- flag passed to cp prevents it from processing files st...