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Which UUID version to use?
... true, than you have a very GOOD chance of two machines in the world eventually creating the same "UUID"v4 (quotes because there isn't a mechanism for guaranteeing U.niversal U.niqueness). In that situation, I don't think that algorithm belongs in a RFC describing methods for generating unique valu...
How to retrieve a single file from a specific revision in Git?
... out of the output and used as an argument to git-cat-file, which should really be called git-cat-object, and simply dumps that object to stdout.
Note: since Git 2.11 (Q4 2016), you can apply a content filter to the git cat-file output.
See
commit 3214594,
commit 7bcf341 (09 Sep 2016),
commit 7bcf3...
How to generate a Dockerfile from an image?
...;image_id>
-f, --full-tree Generate Dockerfile for all parent layers
-h, --help Show this message
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What's the difference between using “let” and “var”?
...does not create a property on the global object:
var foo = "Foo"; // globally scoped
let bar = "Bar"; // globally scoped
console.log(window.foo); // Foo
console.log(window.bar); // undefined
Redeclaration
In strict mode, var will let you re-declare the same variable in the same scope while let...
What is the gain from declaring a method as static
... you fulfill a contract in a given scope. The narrower the scope is, the smaller the chance is that you write a bug.
When a method is static, you can't access non-static members; hence, your scope is narrower. So, if you don't need and will never need (even in subclasses) non-static members to fulf...
Launching Google Maps Directions via an intent on Android
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Navigation intents seem to be officially supported now: developers.google.com/maps/documentation/android/…
– Sanketh Katta
Feb 15 '15 at 1:59
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Determining Whether a Directory is Writeable
...rror is high.
– mjv
Feb 6 '10 at 19:32
54
Testing a directory for just the write bit isn't enough...
Programmatically creating Markdown tables in R with KnitR
...rmat argument, since knitr is aware of the output format and will automatically set it
– Yihui Xie
Nov 12 '13 at 6:20
3
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What does set -e mean in a bash script?
...shell functions, so if you have functions, set -o errtrace or set -E will allow you to just set the trap once and apply it globally.
– ykay
Jul 17 '15 at 18:21
32
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How to check if a user is logged in (how to properly use user.is_authenticated)?
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answered Sep 5 '10 at 3:32
Brian NealBrian Neal
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