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How does zip(*[iter(s)]*n) work in Python?
... length n, where each element is x. *arg unpacks a sequence into arguments for a function call. Therefore you're passing the same iterator 3 times to zip(), and it pulls an item from the iterator each time.
x = iter([1,2,3,4,5,6,7,8,9])
print zip(x, x, x)
...
Does Go have “if x in” construct similar to Python?
... do it, like this:
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
If you want to be able to check for membership without iterating over the whole list, you need to use a map instead of ...
How often does python flush to a file?
...
For file operations, Python uses the operating system's default buffering unless you configure it do otherwise. You can specify a buffer size, unbuffered, or line buffered.
For example, the open function takes a buffer size...
Pelican 3.3 pelican-quickstart error “ValueError: unknown locale: UTF-8”
...ed to this issue. It appears that Python makes some assumptions about the format of locale names that aren't universally valid. Explicitly setting these environment vars is basically just a workaround for that bug.
[Edit:] As @asmeurer correctly points out, the above fix assumes English and the U...
为什么编译好的libcurl静态lib用不了？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...ust
add -DCURL_STATICLIB to your CFLAGS. Otherwise the linker will look for
dynamic import symbols. If you get linker error like "unknown symbol
__imp__curl_easy_init ..." you have linked against the wrong (static)
library. If you want to use the libcurl.dll and import lib, you don't nee...
How do you test functions and closures for equality?
...
Chris Lattner wrote on the developer forums:
This is a feature we intentionally do not want to support. There are
a variety of things that will cause pointer equality of functions (in
the swift type system sense, which includes several kinds of closures...
Convert Elixir string to integer or float
...ng.to_float/1.
Hint: See also to_atom/1,to_char_list/1,to_existing_atom/1for other conversions.
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JavaScript post request like a form submit
...
Dynamically create <input>s in a form and submit it
/**
* sends a request to the specified url from a form. this will change the window location.
* @param {string} path the path to send the post request to
* @param {object} params the paramiters to add t...
How can I check if a background image is loaded?
...
Seems like the image would be loaded twice for no reason.
– HyderA
Feb 20 '11 at 16:42
49
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How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
... Time.at 1318996912 is preferable in some cases because it infers the time for your local timezone, as WattsInABox pointed out.
– JellicleCat
Sep 10 at 21:22
...