大约有 5,100 项符合查询结果（耗时：0.0142秒） [XML]
How do I format a number with commas in T-SQL?
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Fiddle is broken, it now says String index out of range: 33
– Jeff Puckett
Oct 26 '16 at 20:14
1
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How to add extension methods to Enums
...th: return dateTime.AddMonths(1);
default: throw new ArgumentOutOfRangeException("duration");
}
}
}
I think enums are not the best choice in general but at least this lets you centralize some of the switch/if handling and abstract them away a bit until you can do something better. R...
Create a .csv file with values from a Python list
...is the worked example for you:
import csv
data = ["value %d" % i for i in range(1,4)]
out = csv.writer(open("myfile.csv","w"), delimiter=',',quoting=csv.QUOTE_ALL)
out.writerow(data)
Produces:
"value 1","value 2","value 3"
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Getting MAC Address
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Or ':'.join(("%012X" % mac)[i:i+2] for i in range(0, 12, 2)) for an uppercase MAC with each byte separated by a colon.
– tomlogic
Nov 10 '14 at 17:21
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How to convert linq results to HashSet or HashedSet
...ble to express the type of T explicitly:
var query = from i in Enumerable.Range(0, 10)
select new { i, j = i + 1 };
var resultSet = query.ToHashSet();
You can't do that with an explicit call to the HashSet<T> constructor. We're relying on type inference for generic methods to do...
How to get back to most recent version in Git?
...k to master. (And many many commands like git log actually take a revision range, which defaults to HEAD.)
– Cascabel
Aug 24 '10 at 17:39
3
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How is std::function implemented?
...(with an additional parameter that tells what to do) as to save some bytes
raw pointers are used to store the functor object, along with a function pointer in a union, so that when a function object is constructed from an function pointer, it will be stored directly in the union rather than heap spa...
DbEntityValidationException - How can I easily tell what caused the error?
... to the database.
So, EF will check whether the property's value is out of range, like when you designed the table. Table_Column_UserName is varchar(20). But, in EF, you entered a value that longer than 20.
Or, in other cases, if the column does not allow to be a Null.
So, in the validation process...
Selectors in Objective-C?
...dd the extra argument names along with their colons, as in compare:options:range:locale:.
You can also look at the documentation and note the presence or absence of a trailing colon.
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What static analysis tools are available for C#? [closed]
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Our company bought that. In the range of $30K for us
– Dan dot net
Mar 8 '11 at 21:13
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