大约有 5,530 项符合查询结果（耗时：0.0160秒） [XML]
Surrogate vs. natural/business keys [closed]
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100
Both. Have your cake and eat it.
Remember there is nothing special about a primary key, exce...
UnboundLocalError on local variable when reassigned after first use
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Charlie MartinCharlie Martin
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Why aren't programs written in Assembly more often? [closed]
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If an average production program has say 100k lines of code, and each line is about 8-12 assembler instructions, that would be 1 million of assembler instructions.
Even if you could write all this by hand at a decent speed (remember, its 8 times more code that you...
MySQL: multiple tables or one table with many columns?
...s). In my problem table (data from very lengthy insurance forms, more than 100 columns) we have multiple varchar columns, all UTF8. So we easily filled the ~8000 bytes limit and got "error 139 from storage engine" all the time. So we had to split the table. (We tested with the newer Barracuda format...
Django ModelForm: What is save(commit=False) used for?
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Let's go to 100 :)
– dani herrera
May 27 at 16:00
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Set cURL to use local virtual hosts
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+100
Does the server actually get the requests, and are you handling the host name (alias) properly?
after adding to my .hosts file
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Is it possible to dynamically compile and execute C# code fragments?
...Main(string[] args) {
var q = from i in Enumerable.Range(1,100)
where i % 2 == 0
select i;
}
}");
results.Errors.Cast<CompilerError>().ToList().ForEach(error => Console.WriteLine(error.Erro...
PDO Prepared Inserts multiple rows in single query
...ray_push() to create $insert_values instead of array_merge() resulted in a 100X speed up with execution time of 0.41s.
The problematic array_merge():
$insert_values = array();
foreach($data as $d){
$question_marks[] = '(' . placeholders('?', sizeof($d)) . ')';
$insert_values = array_merge($ins...
How to create a multi-tenant database with shared table structures?
... - No, shouldn't need to place them on separate servers - imagine you have 100s, that is a lot of server instances/licenses you'd need for a start. See Daniel's answer further up, there's some good links in there.
– AdaTheDev
Jun 8 '11 at 10:35
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Programming with white text on black background?
...ckgrounds are very fatiguing. I have heard it described as "staring into a 100 watt lightbulb" and that's how it feels to me.
Room lighting can potentially have a significant effect also. Brighter rooms may lend themselves to brighter backgrounds, and darker rooms to dark backgrounds. It reduces th...