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How can I modify the size of column in a MySQL table?
...tomatically converts it to a MEDIUMTEXT data type.
mysql> create table foo (str varchar(300));
mysql> alter table foo modify str varchar(65536);
mysql> show create table foo;
CREATE TABLE `foo` (
`str` mediumtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1 row in set (0.00 sec)
I misread ...
How to do parallel programming in Python?
...
from joblib import Parallel, delayed
You can simply create a function foo which you want to be run in parallel and based on the following piece of code implement parallel processing:
output = Parallel(n_jobs=num_cores)(delayed(foo)(i) for i in input)
Where num_cores can be obtained from mult...
Explain the encapsulated anonymous function syntax
...on () {
alert(2 + 2);
}());
Or named function expression:
(function foo() {
alert(2 + 2);
}());
The Parentheses (formally called the Grouping Operator) can surround only expressions, and a function expression is evaluated.
The two grammar productions can be ambiguous, and they can look...
java: HashMap not working
...ittle difference in the code. Auto-boxing means you can write:
myMap.put("foo", 3);
instead of:
myMap.put("foo", new Integer(3));
Auto-boxing means the first version is implicitly converted to the second. Auto-unboxing means you can write:
int i = myMap.get("foo");
instead of:
int i = myMa...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...据：
INSERT INTO `users` (`username`, `password`, `email`)
VALUES
('foo', 'ffffffffffffffffffffffffffffffff', 'foo@domain.com'),
('bar', 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb', 'bar@domain.com');
接着在containers里配置这个表：
INSERT INTO innodb_memcache.containers (
name, db_...
Creating an empty file in Ruby: “touch” equivalent?
...
If you are worried about file handles:
File.open("foo.txt", "w") {}
From the docs:
If the optional code block is given, it will be passed the opened file
as an argument, and the File object will automatically be closed when
the block terminates.
...
How to automatically convert strongly typed enum into int?
...typename std::underlying_type<E>::type>(e);
}
std::cout << foo(to_underlying(b::B2)) << std::endl;
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...
What do
...rther constrain one of its type parameters. Here's an example:
case class Foo[A](a:A) { // 'A' can be substituted with any type
// getStringLength can only be used if this is a Foo[String]
def getStringLength(implicit evidence: A =:= String) = a.length
}
The implicit argument evidence is ...
What's the use of do while(0) when we define a macro? [duplicate]
...up several statements into one macro.
Assume you did something like:
if (foo)
INIT_LIST_HEAD(bar);
If the macro was defined without the encapsulating do { ... } while (0);, the above code would expand to
if (foo)
(bar)->next = (bar);
(bar)->prev = (bar);
This is clearly not...
How to split (chunk) a Ruby array into parts of X elements? [duplicate]
...
Take a look at Enumerable#each_slice:
foo.each_slice(3).to_a
#=> [["1", "2", "3"], ["4", "5", "6"], ["7", "8", "9"], ["10"]]
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