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Design Patterns: Factory vs Factory method vs Abstract Factory
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All three Factory types do the same thing: They are a "smart constructor".
Let's say you want to be able to create two kinds of Fruit: Apple and Orange.
Factory
Factory is "fixed", in that you have just one implementation with no subclassing. In ...
In bash, how does one clear the current input?
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Don't get used to that, use Ctrl-U. Ctrl-C is not that bad in bash, but if you have e.g. a mysql client prompt, Ctrl-C will disconnect from the server which is really annoying.
– Christian
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MySQL - Make an existing Field Unique
...s with duplicates on a unique key, The other conflicting rows are deleted. Docs
– The Scrum Meister
Feb 18 '11 at 5:47
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Using scp to copy a file to Amazon EC2 instance?
I am trying to use my Mac Terminal to scp a file from Downloads (phpMyAdmin I downloaded online) to my Amazon EC2 instance.
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Display / print all rows of a tibble (tbl_df)
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if you want don't want to worry about the value of n and you're already piping, you can use df %>% tbl_df %>% print(n = nrow(.))
– ClaytonJY
Aug 3 '16 at 15:57
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Is there any way to check if iOS app is in background?
... States are spelled out here: developer.apple.com/library/ios/documentation/uikit/reference/…
– Dan Rosenstark
Apr 7 '14 at 18:00
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What's the difference between “squash” and “fixup” in Git/Git Extension?
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I do not know what Git Extensions does with it specifically, but git rebase has an option to automatically squash or fixup commits with squash! or fixup! prefixes, respectively:
--autosquash, --no-autosquash
When the...
CSS center display inline block?
...e here: http://jsfiddle.net/WVm5d/ (you might need to make the result window bigger to see the align center effect)
9 Ans...
How to check if all elements of a list matches a condition?
...ng of like 20000 lists. I use each list's 3rd element as a flag. I want to do some operations on this list as long as at least one element's flag is 0, it's like:
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Why is #!/usr/bin/env bash superior to #!/bin/bash?
...ggest using #!/bin/bash was wrong and bash functionality would be lost by doing so.
6 Answers
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