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How can I drop all the tables in a PostgreSQL database?
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What is the use of hashCode in Java?
...ode of the element, then look for the bucket where hash code points to. If more than 1 element is found in the same bucket (multiple objects can have the same hash code), then it uses the equals() method to evaluate if the objects are equal, and then decide if contains() is true or false, or decide ...
Using print statements only to debug
... run your code with or without logging.
The standard logging module has a more elaborate mechanism for this.
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Asynctask vs Thread in android
... do not require downloading a lot of data
Disk-bound tasks that might take more than a few milliseconds
Use Java threads for:
Network operations which involve moderate to large amounts of data (either uploading or downloading)
High-CPU tasks which need to be run in the background
Any task where ...
Security of REST authentication schemes
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lose vim colorscheme in tmux mode
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I use this instead of tmux -2 as this is more verbose.
– thameera
Apr 16 '13 at 7:01
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How do you comment out code in PowerShell?
...wershell
In PowerShell V2 <# #> can be used for block comments and more specifically for help comments.
#REQUIRES -Version 2.0
<#
.SYNOPSIS
A brief description of the function or script. This keyword can be used
only once in each topic.
.DESCRIPTION
A detailed description of...
Reorder levels of a factor without changing order of values
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some more, just for the record
## reorder is a base function
df$letters <- reorder(df$letters, new.order=letters[4:1])
library(gdata)
df$letters <- reorder.factor(df$letters, letters[4:1])
You may also find useful Releve...
What is reflection and why is it useful?
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