大约有 47,000 项符合查询结果(耗时:0.0526秒) [XML]
Multiple queries executed in java in single statement
...mysql> create table tbl_mq( i int not null auto_increment, name varchar(10), primary key (i) );
Query OK, 0 rows affected (0.16 sec)
mysql> delimiter //
mysql> create procedure multi_query()
-> begin
-> select count(*) as name_count from tbl_mq;
-> insert into tbl_mq...
Finding the index of an item in a list
...ster than straight l.index(999_999), because the former only has to search 10 entries, while the latter searches a million:
>>> import timeit
>>> timeit.timeit('l.index(999_999)', setup='l = list(range(0, 1_000_000))', number=1000)
9.356267921015387
>>> timeit.timeit('l.in...
How do I use the includes method in lodash to check if an object is in the collection?
...owLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\...
Performing Breadth First Search recursively
...
answered Mar 31 '10 at 2:32
TanzelaxTanzelax
4,75022 gold badges2323 silver badges2828 bronze badges
...
What is the formal difference in Scala between braces and parentheses, and when should they be used?
...tement // not optional here
var x = 0 // declaration
while (x < 10) { x += 1 } // stuff
(x % 5) + 1 // expression
}
( expression )
So, if you need declarations, multiple statements, an import or anything like that, you need curly braces. And because an expression is a statement, par...
How to check if a value exists in a dictionary (python)
...ve timing:
>>> T(lambda : 'one' in d.itervalues()).repeat()
[0.28107285499572754, 0.29107213020324707, 0.27941107749938965]
>>> T(lambda : 'one' in d.values()).repeat()
[0.38303399085998535, 0.37257885932922363, 0.37096405029296875]
>>> T(lambda : 'one' in d.viewvalues())...
Requests — how to tell if you're getting a 404
...owLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\...
How to determine if a process runs inside lxc/Docker?
...
tshepang
10.3k2020 gold badges7979 silver badges123123 bronze badges
answered Nov 15 '13 at 23:36
jpetazzojpet...
Mysql - How to quit/exit from stored procedure
...
piotrmpiotrm
10.6k44 gold badges2626 silver badges2727 bronze badges
...
DROP IF EXISTS VS DROP?
...all'Mike Sherrill 'Cat Recall'
78.5k1616 gold badges103103 silver badges156156 bronze badges
6
...