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How to get milliseconds from LocalDateTime in Java 8
...o this.
However, maybe you already have a LocalDateTime or similar object from somewhere and you want to convert it to milliseconds since the epoch. It's not possible to do that directly, since the LocalDateTime family of objects has no notion of what time zone they're in. Thus time zone informatio...
Google Maps API v3: How to remove all markers?
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But does this clear the markers from memory? I realize JavaScript has automatic garbage collection, but how do we know Google's API does not hold a reference to the marker when setMap(null) is called? In my application, I add and "delete" a ton of markers...
Why are hexadecimal numbers prefixed with 0x?
...uage used the syntax 8 1234 for octal numbers. When Ken Thompson created B from BCPL, he used the 0 prefix instead. This is great because
an integer constant now always consists of a single token,
the parser can still tell right away it's got a constant,
the parser can immediately tell the base (0...
Create Git branch with current changes
...opic material to your master branch in a repository that other people pull from. Or at least, if you do need to do a reset you'll need to tell people that's what you are doing so the warnings from their next pull aren't too much of a shock.
– Andrew Walker
Oct ...
Add Keypair to existing EC2 instance
... A (waiting for it to come to a complete stop), detach the root EBS volume from the instance (waiting for it to be detached), then attach the volume to instance B on an unused device.
ec2-stop-instances $instance_a
ec2-detach-volume $volume
ec2-attach-volume --instance $instance_b --device /dev/sdj...
How to delete a column from a table in MySQL
...OP, ADD and ALTER multiple columns on the same table in the one statement. From the MySQL reference manual:
You can issue multiple ADD, ALTER, DROP, and CHANGE clauses in a single ALTER TABLE statement, separated by commas. This is a MySQL extension to standard SQL, which permits only one of eac...
Delete all tags from a Git repository
I want to delete all the tags from a Git repository. How can I do that?
11 Answers
11
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How do you do a simple “chmod +x” from within python?
I want to create a file from within a python script that is executable.
7 Answers
7
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Generate a Hash from string in Javascript
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About half of the answers are the same String.hashCode function taken from Java. It is ancient (from Gosling Emacs, 1981), extremely weak, and performance-wise, it makes zero sense in modern JavaScript. In fact, hashCode is significantly faster by using ES6 Math.imul, but no one took notice. We...
How to use a dot “.” to access members of dictionary?
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Note that this will behave differently from common expectations in that it won't raise AttributeError if the attribute does not exist. Instead it will return None.
– mic_e
Aug 1 '16 at 10:45
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