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ssl证书申请报错：challenge = [c for c in authorization[\'challenges\']...
...ge = [c for c in authorization['challenges'] if c['type'] == "http-01"][0] IndexError: list index out of rangechallenge-list-index-out-of-range使用acme-tiny申请ssl证书时报错：challenge = [c for c in authorization[& 39;challenges& 39;] if c[& 39;type& 39;] == "http-01"][0] IndexError: list ...
mysql实现split分割字符串（length, SUBSTRING_INDEX, substring） - 爬虫/...
由于MySql没有直接的split函数，只提供了length, SUBSTRING_INDEX, substring三个函数，这里介绍如何用这三个函数实现split功能。
# SUBSTRING_INDEX(str, delim, count)：返回字符串 str 中在第 count 个出现的分隔符 delim 之前的子串。如果 count 是...
Add all files to a commit except a single file?
...) To start ignoring changes to a single already versioned file
git update-index --assume-unchanged "main/dontcheckmein.txt"
and to undo that git update-index --no-assume-unchanged "main/dontcheckmein.txt"
github docs to ignore files
2) To completely ignore a specific single file preventing it f...
Can a C# class inherit attributes from its interface?
...xisting type (to avoid duplication), but it is only valid for property and indexer usage.
As an example:
using System;
using System.ComponentModel;
class Foo {
[AttributeProvider(typeof(IListSource))]
public object Bar { get; set; }
static void Main() {
var bar = TypeDescripto...
jQuery Determine if a matched class has a given id
... //do something with bar
});
I'm glad you solved your problem with index(), what ever works for you.I hope this will help others with the same problem. Cheers :)
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What is a rune?
...akes 1 ~ 3 bytes, while each rune takes 4 bytes
For string, both len() and index are based on bytes.
For []rune, both len() and index are based on rune (or int32).
Relationships - string & []rune:
When you convert from string to []rune, each utf-8 char in that string becomes a rune.
Similarl...
Java: Best way to iterate through a Collection (here ArrayList)
...
The first one is useful when you need the index of the element as well. This is basically equivalent to the other two variants for ArrayLists, but will be really slow if you use a LinkedList.
The second one is useful when you don't need the index of the element but ...
How can I link to a specific glibc version?
...s modify glibc with:
diff --git a/nptl/thrd_create.c b/nptl/thrd_create.c
index 113ba0d93e..b00f088abb 100644
--- a/nptl/thrd_create.c
+++ b/nptl/thrd_create.c
@@ -16,11 +16,14 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
+#include <stdi...
How can I default a parameter to Guid.Empty in C#?
...id() instead
public void Problem(Guid optional = new Guid())
{
// when called without parameters this will be true
var guidIsEmpty = optional == Guid.Empty;
}
You can also use default(Guid)
default(Guid) also will work exactly as new Guid().
Because Guid is a value type not reference type, ...
Postgresql: Conditionally unique constraint
... conditional) UNIQUE constraint - however, you can create a partial unique index. PostgreSQL uses unique indexes to implement unique constraints, so the effect is the same, you just won't see the constraint listed in information_schema.
CREATE UNIQUE INDEX stop_myc ON stop (col_a) WHERE (col_b is N...