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Should I index a bit field in SQL Server?
...actions. Would that also be inefficient?
– ingredient_15939
Nov 30 '11 at 2:30
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What's the difference between deadlock and livelock?
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mahmah
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What are some popular naming conventions for Unit Tests? [closed]
1) MethodName_StateUnderTest_ExpectedBehavior
7 Answers
7
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How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
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edited Jun 6 at 14:50
Kukeltje
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How do popular apps authenticate user requests from their mobile app to their server?
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diyoda_diyoda_
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How to generate a random int in C?
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int r = rand(); // Returns a pseudo-random integer between 0 and RAND_MAX.
Edit: On Linux, you might prefer to use random and srandom.
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Java8 Lambdas vs Anonymous classes
... comment by a compiler engineer: habrahabr.ru/post/313350/comments/#comment_9885460
– ZhekaKozlov
Jun 3 '17 at 3:49
@Z...
Remove Identity from a column in a table
...the two tables (instant).
Drop the original (now-empty table), exec sys.sp_rename to rename the various schema objects back to the original names, and then you can recreate your foreign keys.
For example, given:
CREATE TABLE Original
(
Id INT IDENTITY PRIMARY KEY
, Value NVARCHAR(300)
);
CREAT...
How to validate an email address in PHP
...t way to check whether an email address is well-formed is to use the filter_var() function:
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
}
Additionally you can check whether the domain defines an MX record:
if (!checkdnsrr($domain, 'MX')) {
// domain is not v...
Secure hash and salt for PHP passwords
...asswords in any manner.
Never hash passwords with SHA1 or MD5 or even SHA256! Modern crackers can exceed 60 and 180 billion hashes/second (respectively).
Don't mix bcrypt and with the raw output of hash(), either use hex output or base64_encode it. (This applies to any input that may have a rogue \0...