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Assign multiple columns using := in data.table, by group
What is the best way to assign to multiple columns using data.table ? For example:
2 Answers
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Git submodule inside of a submodule (nested submodules)
Is it possible for a git submodule to be made of several other git submodules, and the super git repo to fetch the contents for each submodule?
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Reusing a PreparedStatement multiple times
in the case of using PreparedStatement with a single common connection without any pool, can I recreate an instance for every dml/sql operation mantaining the power of prepared statements?
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How do I update a formula with Homebrew?
How do I update a formula?
6 Answers
6
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Do event handlers stop garbage collection from occurring?
If I have the following code:
4 Answers
4
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Prevent wrapping of span or div
I'd like to put a group of div elements of fixed width into a container and have the horizontal scroll bar appeared. The div / span elements should appear in a line, left to right in the order they appear in the HTML (essentially unwrapped).
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Initialize a long in Java
Primitive Data Types - oracle doc says the range of long in Java is -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 .
But when I do something like this in my eclipse
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PHP - Modify current object in foreach loop
I was wondering if it is possible to edit the current object that's being handled within a foreach loop
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How do I create an immutable Class?
I am working on creating an immutable class.
I have marked all the properties as read-only.
6 Answers
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Create a hexadecimal colour based on a string with JavaScript
I want to create a function that will accept any old string (will usually be a single word) and from that somehow generate a hexadecimal value between #000000 and #FFFFFF , so I can use it as a colour for a HTML element.
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