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Transaction isolation levels relation with locks on table
...ds the data under some condition i.e. WHERE aField > 10 AND aField < 20, A inserts data where aField value is between 10 and 20, then B reads the data again and get a different result.
SERIALIZABLE - lock on a full table(on which Select query is fired). This means, B reads the data and no othe...
Using Sass Variables with CSS3 Media Queries
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102
This is simply not possible. Since the trigger @media screen and (max-width: 1170px) happens on ...
What is the best way to unit test Objective-C code?
...t is described in the Xcode Overview: Using Unit Tests.
Back in the Xcode 2 days, I wrote a series of weblog posts about how to perform some common tasks with Xcode unit testing:
Unit testing Cocoa frameworks
Debugging Cocoa framework unit tests
Unit testing Cocoa applications
Debugging Cocoa app...
How can I get a file's size in C++? [duplicate]
...oes not necessarily return the right value. See http://stackoverflow.com/a/22986486/1835769
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Determine Whether Integer Is Between Two Other Integers?
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1125
if 10000 <= number <= 30000:
pass
...
Find the number of columns in a table
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205
SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_catalog = 'database_name' -- th...
Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
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502
I would suggest using the duplicated method on the Pandas Index itself:
df3 = df3[~df3.index.dup...
How to disable margin-collapsing?
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266
There are two main types of margin collapse:
Collapsing margins between adjacent elements
Co...
How to deserialize a list using GSON or another JSON library in Java?
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332
With Gson, you'd just need to do something like:
List<Video> videos = gson.fromJson(json,...