大约有 48,000 项符合查询结果（耗时：0.0815秒） [XML]
Storing Images in DB - Yea or Nay?
...han file system storage
you can super-accelerate file system access with standard off the shelf products
for example, many web servers use the operating system's sendfile() system call to asynchronously send a file directly from the file system to the network interface. Images stored in a database...
How to move columns in a MySQL table?
...the structure view of a table.
Check to select the column you want to move and click the change action at the bottom of the column list.
You can then change all of the column properties and you'll find the 'move column' function at the far right of the screen.
Of course this is all just building th...
Delete newline in Vim
...
If you are on the first line, pressing (upper case) J will join that line and the next line together, removing the newline. You can also combine this with a count, so pressing 3J will combine all 3 lines together.
share
...
Transaction marked as rollback only: How do I find the cause
...at is right (you hadn't provided methodC in your first post). Both methodB and methodC use same TX and always the most specific @Transactional annotation is used, so when methodC throws the exception, surrounding TX will be marked as rollback-only. You can also use different propagation markers to p...
How can I get the sha1 hash of a string in node.js?
...
See the crypto.createHash() function and the associated hash.update() and hash.digest() functions:
var crypto = require('crypto')
var shasum = crypto.createHash('sha1')
shasum.update('foo')
shasum.digest('hex') // => "0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33...
Validate uniqueness of multiple columns
Is there a rails-way way to validate that an actual record is unique and not just a column? For example, a friendship model / table should not be able to have multiple identical records like:
...
Node.js setting up environment specific configs to be used with everyauth
...ror or other settings};
}
};
Then as per Jans solution load the file and create a new instance which we could pass in a value if needed, in this case process.env.NODE_ENV is global so not needed.
var Config = require('./conf'),
conf = new Config();
Then we can access the config object p...
How to avoid the “divide by zero” error in SQL?
...nullif(divisor, 0) ..." breaks if divisor is NULL.
– Anderson
Dec 1 '14 at 10:51
8
...
Why does parseInt(1/0, 19) return 18?
...parseInt scans the input "Infinity" to find which part of it can be parsed and stops after accepting the first I (because n is not a valid digit in base 19).
Therefore it behaves as if you called parseInt("I", 19), which converts to decimal 18 by the table above.
...
Converting .NET DateTime to JSON [duplicate]
...
This will come in handy too: var re = /-?\d+/; var m = re.exec(json_date_string); var d = new Date(parseInt(m[0]));
– Tominator
Sep 15 '09 at 8:03
...