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Creating an index on a table variable
...ate index after insert.
CREATE TABLE #Table(C1 int,
C2 NVarchar(100) , C3 varchar(100)
UNIQUE CLUSTERED (c1)
);
Create table with unique clustered index
Insert data into Temp "#Table" table
Create non clustered indexes.
CREATE NONCLUSTERED INDEX IX1 ON #Table (C2,C3);
...
How to iterate over rows in a DataFrame in Pandas
...as as pd
import numpy as np
df = pd.DataFrame({'c1': [10, 11, 12], 'c2': [100, 110, 120]})
for index, row in df.iterrows():
print(row['c1'], row['c2'])
10 100
11 110
12 120
share
|
improve ...
Wait until file is unlocked in .NET
... FileMode.Open, FileAccess.ReadWrite,
FileShare.None, 100))
{
fs.ReadByte();
// If we got this far the file is ready
break;
}
}
catch (Exception ex)
{...
Why do we use Base64?
... (or UTF-8) it will look like this:
72 101 108 108 111 10 119 111 114 108 100 33
The byte 10 is corrupted in some systems so we can base 64 encode these bytes as a Base64 string:
SGVsbG8sCndvcmxkIQ==
Which when encoded using ASCII looks like this:
83 71 86 115 98 71 56 115 67 110 100 118 99 10...
How do I associate file types with an iPhone application?
... Dload Upload Total Spent Left Speed
100 27393 100 27393 0 0 24983 0 0:00:01 0:00:01 --:--:-- 28926
$ cat headers
HTTP/1.1 200 OK
accept-ranges: bytes
cache-control: max-age=0
content-disposition: attachment; filename="123.icz"
Content-Type: text...
What are the basic rules and idioms for operator overloading?
... positive deviations are few and far between. At the very least, 99 out of 100 such deviations I have seen were unjustified. However, it might just as well have been 999 out of 1000. So you’d better stick to the following rules.
Whenever the meaning of an operator is not obviously clear and undis...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII
... characters are more common.
For example, in a search I just performed on 100 random English Wikipedia articles, the most common non-ASCII characters are ·•–é°®’èö—. Based on this fact,
The bytes 0x92, 0x95, 0x96, 0x97, 0xAE, 0xB0, 0xB7, 0xE8, 0xE9, or 0xF6 suggest windows-1252.
Th...
Are global variables bad? [closed]
...
If someone's passing around 100 variables, then they've not learnt what an object is. Using the reference to this object is then at worst passing around a pointer. I'd say that the rule isn't just clarity, but testability too - and using a non-global ...
Tools for analyzing performance of a Haskell program
...NTRE MODULE %time %alloc
numDivs Main 100.0 100.0
Indicating that all your time is spent in numDivs, and it is also the source of all your allocations.
Heap Profiles
You can also get a break down of those allocations, by running with +RTS -p -hy, which creat...
What is NoSQL, how does it work, and what benefits does it provide? [closed]
...of joins is very hard on "traditional" RDBMSs) - could well be a factor of 1000 in extreme cases.
Is the technology too new to start implementing yet or is it worth taking a look into?
Depends mainly on what you're trying to achieve. It's certainly mature enough to use. But few applications really ...