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Automatically creating directories with file output [duplicate]
...nction does this. Try the following:
import os
import errno
filename = "/foo/bar/baz.txt"
if not os.path.exists(os.path.dirname(filename)):
try:
os.makedirs(os.path.dirname(filename))
except OSError as exc: # Guard against race condition
if exc.errno != errno.EEXIST:
...
Get filename from file pointer [duplicate]
...
You can get the path via fp.name. Example:
>>> f = open('foo/bar.txt')
>>> f.name
'foo/bar.txt'
You might need os.path.basename if you want only the file name:
>>> import os
>>> f = open('foo/bar.txt')
>>> os.path.basename(f.name)
'bar.txt'
...
What do {curly braces} around javascript variable name mean [duplicate]
...e able to use this pattern to assign multiple variables at once:
{x, y} = foo;
Is the equivalent to:
x = foo.x;
y = foo.y;
This can also be used for arrays. For example, you could easily swap two values without using a temporary variable:
var a = 1;
var b = 3;
[a, b] = [b, a];
Browser s...
shared_ptr指针被赋值后，原指针会引用清零、自动释放。 - C/C++ - 清泛网 ...
...原指针会引用清零、自动释放。std::shared_ptr<int> intg;void foo(std::shared_ptr<int> p){ ...shared_ptr指针被赋值后，原指针会引用清零、自动释放。
std::shared_ptr<int> intg;
void foo(std::shared_ptr<int> p)
{
intg = p; // 原指针释放，存...
背包：将代码块复制并粘贴到不同的屏幕和项目 · App Inventor 2 中文网
...在粘贴的块中重命名为 X2。
同样，如果你尝试粘贴过程 foo 的过程定义，并且工作区已包含 foo 的定义，则粘贴的过程将被重命名为 foo2。
可以将代码块粘贴到任何项目或屏幕中吗？
是的。 但是，在某些情况下，将背包中的...
Invoking a jQuery function after .each() has completed
...ther's comments like... Naively, I'm looking for something like elems.each(foo,bar) where foo='function applied to each element' and bar='callback after all iterations have completed'. ...he seems insistent that it is an each() issue. That's why I threw this answer into the mix.
...
How do I get a file extension in PHP?
...
pathinfo()
$path_info = pathinfo('/foo/bar/baz.bill');
echo $path_info['extension']; // "bill"
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Why can I throw null in Java? [duplicate]
...way makes it a bit more obvious as to why this works:
try {
Exception foo = null;
if(false) {
foo = new FileNotFoundException();
} // Oops, forgot to set foo for the true case..
throw foo;
} catch (Exception e){
System.out.println(e instanceof NullPointerException);
...
Split by comma and strip whitespace in Python
..., 'here']
This works even if ^\s+ doesn't match:
>>> string = "foo, bar "
>>> print([x for x in pattern.split(string) if x])
['foo', 'bar']
>>>
Here's why you need ^\s+:
>>> pattern = re.compile("\s*,\s*|\s+$")
>>> print([x for x in pattern.split...
Remove a fixed prefix/suffix from a string in Bash
...
$ foo=${string#"$prefix"}
$ foo=${foo%"$suffix"}
$ echo "${foo}"
o-wor
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