大约有 48,000 项符合查询结果（耗时：0.0613秒） [XML]
CSS: center element within a element
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#parent {
text-align:center;
background-color:blue;
height:400px;
width:600px;
}
.block {
height:100px;
width:200px;
text-align:left;
}
.center {
margin:auto;
background-color:green;
}
.left {
margin:auto auto auto 0;
background-color:red...
How do you check what version of SQL Server for a database using TSQL?
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234
Try
SELECT @@VERSION
or for SQL Server 2000 and above the following is easier to parse :)
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Bootstrap select dropdown list placeholder
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answered Apr 24 '14 at 20:34
BrakkeBrakke
2,32811 gold badge99 silver badges44 bronze badges
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(this == null) in C#!
Due to a bug that was fixed in C# 4, the following program prints true . (Try it in LINQPad)
6 Answers
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Sending HTML email using Python
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433
From Python v2.7.14 documentation - 18.1.11. email: Examples:
Here’s an example of how t...
Excel to CSV with UTF8 encoding [closed]
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408
A simple workaround is to use Google Spreadsheet. Paste (values only if you have complex formu...
How do I get PHP errors to display?
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edited May 14 at 0:32
anthonyryan1
3,55522 gold badges2929 silver badges2424 bronze badges
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How to empty a Heroku database
...) into one action by executing this:
$ heroku run rake db:setup
Edit 2014-04-18: rake db:setup doesn't work with Rails 4, it fails with a Couldn't create database error.
Edit 2014-10-09: You can use rake db:setup with Rails 4. It does give you a Couldn't create database error (because the databa...
How to detect total available/free disk space on the iPhone/iPad device?
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Original answer:
I found the following solution working for me:
-(uint64_t)getFreeDiskspace {
uint64_t totalSpace = 0;
uint64_t totalFreeSpace = 0;
NSError *error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSDi...
What happens to a declared, uninitialized variable in C? Does it have a value?
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edited Aug 17 at 13:34
klutt
19.6k1414 gold badges3737 silver badges6464 bronze badges
answered Oct...