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Specifying column name in a “references” migration
...erence call. I don't see it documented in the docs and it seems to work on my end without it.
– jakecraige
Feb 28 '17 at 22:24
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How to install therubyracer gem on 10.10 Yosemite?
...r -- --with-v8-dir=$(brew --prefix v8-315) works better for me. The dir in my mac is actually /usr/local/opt/v8@3.15
– Junji Zhi
Jul 18 at 17:05
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What is the best way to determine the number of days in a month with JavaScript?
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Note to my future-self: fguillen's equation with the '+ 1' gives 28 days when the year is 2014 and the month is 1 (which, in JavaScript Date-object, means February). Probably want to go with that for least astonishment. But what a...
What is a wrapper class?
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By my understanding of the adapter pattern, it's different from a wrapper: if X wraps Y, then X should encapsulate the state of Y, but not its identity. Given two instances of X, both of which wrap a Y, there should be no means...
Very large matrices using Python and NumPy
...bles will store the data on disk in HDF format, with optional compression. My datasets often get 10x compression, which is handy when dealing with tens or hundreds of millions of rows. It's also very fast; my 5 year old laptop can crunch through data doing SQL-like GROUP BY aggregation at 1,000,000 ...
Managing constructors with many parameters in Java
...which returns a student. Hence Student(name("Joe").age(15).motto("I've wet myself"));
– oxbow_lakes
Oct 21 '08 at 20:46
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Clear file cache to repeat performance testing
...at tools or techniques can I use to remove cached file contents to prevent my performance results from being skewed? I believe I need to either completely clear, or selectively remove cached information about file and directory contents.
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Can dplyr package be used for conditional mutating?
...of G. Grotendieck works and is short so i picked that one as the answer to my question, but I thank you for your solution. I sure will try it this way as well.
– rdatasculptor
Jun 27 '14 at 20:52
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Canvas is stretched when using CSS but normal with “width” / “height” properties
...ent. (ie for retina displays or 8bit style game)
– Samy Bencherif
Nov 13 '18 at 6:13
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This was r...
With MySQL, how can I generate a column containing the record index in a table?
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@smhnaji MySQL requires that every "derived table" is given a name. I decided to call it "r" :) ... It has little purpose in this case, but you'd normally use it to reference attributes of the derived table, as if it was a real table....