大约有 34,900 项符合查询结果（耗时：0.0536秒） [XML]
Why is address zero used for the null pointer?
...alue zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
21 Answe...
Is the size of C “int” 2 bytes or 4 bytes?
...
I know it's equal to sizeof(int). The size of an int is really compiler dependent. Back in the day, when processors were 16 bit, an int was 2 bytes. Nowadays, it's most often 4 bytes on a 32-bit as well as 64-bit systems.
Sti...
How can I handle the warning of file_get_contents() function in PHP?
I wrote a PHP code like this
19 Answers
19
...
How to check whether an object is a date?
...
As an alternative to duck typing via
typeof date.getMonth === 'function'
you can use the instanceof operator, i.e. But it will return true for invalid dates too, e.g. new Date('random_string') is also instance of Date
date instanceof Date
This...
How do I alias commands in git?
...ci "commit -v"
The alias command even accepts functions as parameters. Take a look at aliases.
share
|
improve this answer
|
follow
|
...
What does a lazy val do?
...executed once and then never again. This can be useful when an operation takes long time to complete and when it is not sure if it is later used.
scala> class X { val x = { Thread.sleep(2000); 15 } }
defined class X
scala> class Y { lazy val y = { Thread.sleep(2000); 13 } }
defined class Y
...
Can you connect to Amazon ElastiСache Redis outside of Amazon?
... ElastiCache Redis instance in a VPC from EC2 instances . But I would like to know if there is a way to connect to an ElastiCache Redis node outside of Amazon EC2 instances, such as from my local dev setup or VPS instances provided by other vendors.
...
How do you use script variables in psql?
...need to include the quotes in the variable itself as the above will not work. Instead define your variable as such ...
\set myvariable 'value'
However, if, like me, you ran into a situation in which you wanted to make a string from an existing variable, I found the trick to be this ...
\set quo...
How to change identity column values programmatically?
... answered Jul 27 '09 at 13:15
A-KA-K
15.9k55 gold badges5050 silver badges7070 bronze badges
...
Get Insert Statement for existing row in MySQL
... statements from the MySQL console, but you can get them using mysqldump like Rob suggested. Specify -t to omit table creation.
mysqldump -t -u MyUserName -pMyPassword MyDatabase MyTable --where="ID = 10"
share
|
...