大约有 40,000 项符合查询结果（耗时：0.0384秒） [XML]
Why do people hate SQL cursors so much? [closed]
...I. Cursors are how parts of the RDBMS work under the hood. Often CREATE TABLE and INSERT have SELECT statements, and the implementation is the obvious internal cursor implementation.
Using higher-level "set-based operators" bundles the cursor results into a single result set, meaning less API b...
best practice to generate random token for forgot password
...rch in about a week's time for a low-budget attacker:
mt_rand() is predictable (and only adds up to 31 bits of entropy)
uniqid() only adds up to 29 bits of entropy
md5() doesn't add entropy, it just mixes it deterministically
Since a 56-bit DES key can be brute-forced in about 24 hours, and an a...
When to use nil, blank, empty? [duplicate]
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Here I made this useful table with all the cases
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Converting Storyboard from iPhone to iPad
...e background for everything).
EDIT: It seems the default background for UITableView in the Attributes inspector is rather strange. I had to manually set the background to "Group Table View Background Color" for grouped table views, and "White Color" for non-grouped table views. It then was displa...
When should I use Struct vs. OpenStruct?
...g similar code as burtlo's, on Ruby 1.9.2, (1 of 4 cores x86_64, 8GB RAM) [table edited to align columns]:
creating 1 Mio Structs : 1.43 sec , 219 MB / 90MB (virt/res)
creating 1 Mio Class instances : 1.43 sec , 219 MB / 90MB (virt/res)
creating 1 Mio Hashes : 4.46 sec , 493 ...
How should I pass multiple parameters to an ASP.Net Web API GET?
...alls don't repeat them. In my case I'm just making an insert into another table to track which are processed.
– sig606
Jun 8 '12 at 16:40
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Limit file format when using ?
...ignature (ASP.NET, PHP, Ruby, Java). You might also want to refer to these tables for file types and their magic numbers, to perform a more robust server-side verification.
Here are three good reads on file-uploads and security.
EDIT: Maybe file type verification using its binary signature can also...
How can I suppress column header output for a single SQL statement?
... -sN worked well for me to assign the output to a variable in a script: TABLES=$(mysql -sN -u $DB_USER -p$DB_PASS...
– Michael J
Apr 28 '16 at 20:23
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Python “SyntaxError: Non-ASCII character '\xe2' in file”
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For folks hunting down the problem character, this table is useful. Everything in the "UTF-8 Bytes" column which starts with %E2 is a candidate. Generally the issue is editing code with "smart" features turned on like "smart quotes" replacing " with “ (U+201C) and ” (U+20...
What is Ad Hoc Query?
... just loosely type out where you need it
var newSqlQuery = "SELECT * FROM table WHERE id = " + myId;
...which is an entirely different query each time that line of code is executed, depending on the value of myId. The opposite of an ad hoc query is a predefined query such as a Stored Procedure, w...