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When to Redis? When to MongoDB? [closed]
...performance is not that great and can't be compared to Redis.
Use Redis in order to speed up your existing application.
Redis can be easily integrated as a LRU cache. It is very uncommon to use Redis as a standalone database system (some people prefer referring to it as a "key-value"-store). Websit...
What's the difference between a temp table and table variable in SQL Server?
...) ([4CA996AC-C7E1-48B5-B48A-E721E7A435F0])
SELECT TOP 9 ROW_NUMBER() OVER (ORDER BY (SELECT 0))
FROM sys.all_columns
BEGIN TRAN InsertFailure
SAVE TRAN InsertFailure
COMMIT
/*Try and Insert 10 rows, the 10th one will cause a constraint violation*/
BEGIN TRY
INSERT INTO $(tablename) ([4CA996AC-C7E...
How do I use InputFilter to limit characters in an EditText in Android?
...subsequence the source? Do you see anything wrong with just doing this (in order to only allow alphanumerics plus a few special characters): String replacement = source.subSequence(start, end).toString(); return replacement.replaceAll("[^A-Za-z0-9_\\-@]", "");
– Splash
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What are the best PHP input sanitizing functions?
...tions to make your data a bit safer. That's fine. Your mistake is in the order of operations, and how and where to use these functions.
It's important to understand the difference between sanitizing and validating user data, escaping data for storage, and escaping data for presentation.
Sanitizing...
REST API Login Pattern
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Combine two data frames by rows (rbind) when they have different sets of columns
...=6:10, b=16:20, c = letters[8:12])
Two data.frames, alter originals
In order to retain all columns from both data.frames in an rbind (and allow the function to work without resulting in an error), you add NA columns to each data.frame with the appropriate missing names filled in using setdiff.
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Delaying a jquery script until everything else has loaded
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Multiple $(document).ready() will fire in order top down on the page. The last $(document).ready() will fire last on the page. Inside the last $(document).ready(), you can trigger a new custom event to fire after all the others..
Wrap your code in an event handler...
The most accurate way to check JS object's type?
...ommon sense. Sure, the prototype.toString is slower than the others by an order of magnitude, but in the grand scheme of things it takes on average a couple hundred nanoseconds per call. Unless this call is being used in a critical path that's very frequently executed, this is probably harmless. I...
Finding the source code for built-in Python functions?
...is a string, the return value is the same object.
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| Method resolution order:
| str
| basestring
| object
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| Methods defined here:
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| __add__(...)
| x.__add__(y) <==> x+y
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| __contains__(...)
| x.__contains__(y) <==> y in x
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| __eq__(...)...
Select last row in MySQL
...time where MAX(id) is the right answer! Kind of:
SELECT fields FROM table ORDER BY id DESC LIMIT 1;
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