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How to set environment variable for everyone under my linux system?
...it
looks for ~/.bash_profile,
~/.bash_login, and ~/.profile, in that
order, and reads and executes commands
from the first one that exists and is
readable. The --noprofile option may
be used when the shell is started to
inhibit this behavior.
...
When an
interactive shell that is...
Switch statement for string matching in JavaScript
...cular two key aspects: First, that the cases are considered in source text order, and second that the selector expressions (the bits after the keyword case) are expressions that are evaluated as that case is evaluated (not constants as in some other languages). So since our test expression is true, ...
How do I automatically update a timestamp in PostgreSQL
...he time stamp when a new row is inserted as I can do in MySQL using CURRENT_TIMESTAMP.
4 Answers
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How to run a class from Jar which is not the Main-Class in its Manifest file
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According to the doc this won't work: "In order for this option to work, the manifest of the JAR file must contain a line of the form Main-Class: classname. "
– Thomas
Mar 29 '11 at 15:13
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sql query to return differences between two tables
... you need to make sure you select the same fields (same types) in the same order. SELECT * works if this is the case for all columns; if not, just select some subset.
– ashes999
Mar 11 '13 at 16:14
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How do I access the host machine from the guest machine? [closed]
...restart)
I found that I had to switch the connection setting on VMWare in order to restart the connection before these settings worked for me. I hope this helps.
Can't connect Nexus 4 to adb: unauthorized
...ry to get my Nexus 7 to bring up the auth dialog. For future reference, in order to change the USB connection mode, you have to go into Settings, Storage and hit the menu icon button in the top right - talk about obscure! I had neither MTP or Camera checked, but as soon as I checked the Camera optio...
When does System.gc() do something?
...throwing an OOM, the JVM will already have attempted to garbage collect in order to free up memory
– Scrubbie
Oct 6 '15 at 21:22
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Check if a temporary table exists and delete if it exists before creating a temporary table
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The statement should be of the order
Alter statement for the table
GO
Select statement.
Without 'GO' in between, the whole thing will be considered as one single script and when the select statement looks for the column,it won't be found.
With 'GO' , ...
What is the difference between . (dot) and $ (dollar sign)?
...ns to be chained together without adding parentheses to control evaluation order:
Prelude> head (tail "asdf")
's'
Prelude> head $ tail "asdf"
's'
The compose operator (.) creates a new function without specifying the arguments:
Prelude> let second x = head $ tail x
Prelude> second "...