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“:” (colon) in C struct - what does it mean? [duplicate]
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Those are bit fields. Basically, the number after the colon describes how many bits that field uses. Here is a quote from MSDN describing bit fields:
The constant-expression specifies the width of the field in bits. The
type-speci...
Why unsigned integer is not available in PostgreSQL?
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It is already answered why postgresql lacks unsigned types. However I would suggest to use domains for unsigned types.
http://www.postgresql.org/docs/9.4/static/sql-createdomain.html
CREATE DOMAIN name [ AS ] data_type
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Get the Last Inserted Id Using Laravel Eloquent
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edited May 16 at 10:19
Aruna Perera
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Get the Query Executed in Laravel 3/4
...pretty neat. You can read for instructions on how to install in their repository.
Note for Laravel 5 users: You'll need to call DB::enableQueryLog() before executing the query. Either just above the line that runs the query or inside a middleware.
Laravel 3
In Laravel 3, you can get the last ex...
How to set up Spark on Windows?
...S to the value specified in the guide.
But if you're just playing around with Spark, and don't actually need it to run on Windows for any other reason that your own machine is running Windows, I'd strongly suggest you install Spark on a linux virtual machine. The simplest way to get started probabl...
Change one value based on another value in pandas
...cing and indexing features to logically evaluate the places where your condition holds and overwrite the data there.
Assuming you can load your data directly into pandas with pandas.read_csv then the following code might be helpful for you.
import pandas
df = pandas.read_csv("test.csv")
df.loc[df....
How to explicitly discard an out argument?
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Starting with C# 7.0, it is possible to avoid predeclaring out parameters as well as ignoring them.
public void PrintCoordinates(Point p)
{
p.GetCoordinates(out int x, out int y);
WriteLine($"({x}, {y})");
}
public void Print...
Is “double hashing” a password less secure than just hashing it once?
... a password twice before storage any more or less secure than just hashing it once?
16 Answers
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What is the strict aliasing rule?
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A typical situation where you encounter strict aliasing problems is when overlaying a struct (like a device/network msg) onto a buffer of the word size of your system (like a pointer to uint32_ts or uint16_ts). When you overlay a struct...
How does Google Instant work?
Any ideas on exactly how the new google instant search works? It seems to just be AJAX calls to the old search, but it's pretty hard to simplify Google that much. Anybody have speculations?
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