大约有 15,000 项符合查询结果（耗时：0.0331秒） [XML]
Do while loop in SQL Server 2008
...R
SELECT Id, Title FROM dbo.SourceTable
OPEN Iterator
WHILE 1=1 BEGIN
FETCH NEXT FROM @InputTable INTO @Id, @Title
IF @@FETCH_STATUS < 0 BREAK
PRINT 'Do something with ' + @Title
END
CLOSE Iterator
DEALLOCATE Iterator
Unfortunately, T-SQL doesn't seem to offer a cleaner way to singl...
Why does Java's hashCode() in String use 31 as a multiplier?
...ap.of(42, 42).hashCode() or Map.of("foo", "foo", "bar", "bar").hashCode(), etc, are predictably zero. So don’t use maps as keys for other maps…
– Holger
Aug 30 '19 at 9:12
...
Local file access with JavaScript
...ou can access the hardware, such as current CPU usage or total ram in use, etc.
You can create a windows, linux, or mac desktop application with it that doesn't require any installation.
http://nwjs.io
share
|
...
Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...ter_initialize couldn't easily be moved to before_validation, before_save, etc. Chances are that eventually one of the devs on your team will execute something like MyModel.all.each perhaps for bulk processing of some kind, and thus run this initialization logic MyModel.count num of times.
...
Maximum number of records in a MySQL database table
...4.16xlarge AWS instances (1 reader, 1 writer). Each of the machines had 64 CPU cores, 488GB of ram, 25Gbps network link, 64TB of disk. This scale of db was pushing both CPU and disk size limits and AWS does not provide any larger DB optimized instances. It was replaced with a simpler db schema that...
AI2 Media Notification
...ed, this function gradually switches everything down (display, CPU, WiFi, etc.). In order to bypass Doze mode effectively, it is necessary to create a foreground service. A lot of useful background information can be found in the ZEBRA Developer Portal: Keeping your Android application running wh...
Is < faster than
...zero (equal) --> ZF = 1
jg - Jump if greater --> ZF = 0 and SF = OF
(etc...)
Example (Edited for brevity) Compiled with $ gcc -m32 -S -masm=intel test.c
if (a < b) {
// Do something 1
}
Compiles to:
mov eax, DWORD PTR [esp+24] ; a
cmp eax, DWORD...
Pass correct “this” context to setTimeout callback?
...n, you'd have solved this problem for this case, for map(), for forEach(), etc., etc., using less code, fewer CPU cycles, and less memory. ***See: Misha Reyzlin's answer.
– HoldOffHunger
Oct 20 '17 at 17:06
...
Method names for getting data [closed]
...u are
loading from an external source,
like a file or db.
I would not use
fetch/retrieve because they are too vague and get conflated with get and there is no unambiguous semantic associated with the terms.
Example: fetch implies that some entity needs to go and get something that is remote and bri...
How can I get the current network interface throughput statistics on Linux/UNIX? [closed]
... RHEL/CentOS.
No need for priv, dorky binaries, hacky scripts, libpcap, etc. Win.
$ sar -n DEV 1 3
Linux 2.6.18-194.el5 (localhost.localdomain) 10/27/2010
02:40:56 PM IFACE rxpck/s txpck/s rxbyt/s txbyt/s rxcmp/s txcmp/s rxmcst/s
02:40:57 PM lo 0.00 0.00 ...