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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------------------+------+-----+---------+-------+
| c1 | varchar(32) | NO | PRI | | |
| c2 | varchar(1024) | YES | | NULL | |
| c3 | int(11) ...
How to justify a single flexbox item (override justify-content)
... ( the one with display:flex ) to justify-content:space-around
Then add an extra element between the first and second item and set it to flex-grow:10 (or some other value that works with your setup)
Edit: if the items are tightly aligned it's a good idea to add flex-shrink: 10; to the extra element...
Good reasons to prohibit inheritance in Java?
...re writing purely internal code this may be a bit of overkill. However the extra effort involved in adding five characters to a class file is very small. If you are writing only for internal comsumption then a future coder can always remove the 'final' - you can think of it as a warning saying "this...
Copy files from one directory into an existing directory
...opies it to the target, then returns back to whence ever you started.
The extra fussing is to handle relative or absolute targets.
(This doesn't rely on subtle semantics of the cp command itself ... about how it handles source specifications with or without a trailing / ... since I'm not sure thos...
Casting a variable using a Type variable
... int x = (int)obj;
DoSomethingWithInt(x);
} else if (type == typeof(string)) {
string s = (string)obj;
DoSomethingWithString(s);
} // ...
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How can I delete all unversioned/ignored files/folders in my working copy?
...status --no-ignore | grep '^[I?]' | cut -c 9- |
# setting IFS to the empty string ensures that any leading or
# trailing whitespace is not trimmed from the filename
while IFS= read -r f; do
# tell the user which file is being deleted. use printf
# instead of echo because different implement...
Max return value if empty query
...tion "Sequence contains no elements"
class Program
{
static void Main(string[] args)
{
List<MyClass> list = new List<MyClass>();
list.Add(new MyClass() { Value = 2 });
IEnumerable<MyClass> iterator = list.Where(x => x.Value == 3); // empty iter...
Is it possible to decrypt MD5 hashes?
...culation again (any time, on any computer, anywhere), using the exact same string, it will come up with the same value. And yet, there is no way to find out what the original value was, since there are an infinite number of numbers that have that exact remainder, when divided by n.
That said, MD5 h...
Django class-based view: How do I pass additional parameters to the as_view method?
...m urls.py
https://docs.djangoproject.com/en/1.7/topics/http/urls/#passing-extra-options-to-view-functions
This also works for generic views. Example:
url(r'^$', views.SectionView.as_view(), { 'pk': 'homepage', 'another_param':'?'}, name='main_page'),
In this case the parameters passed to the vi...
How to declare an array in Python?
... contains references to items. Also, underlying array is created with some extra space.
Consequences of this are:
random access is really cheap (arr[6653] is same to arr[0])
append operation is 'for free' while some extra space
insert operation is expensive
Check this awesome table of operation...