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Python non-greedy regexes
...owerful *?
From the docs, Greedy versus Non-Greedy
the non-greedy qualifiers *?, +?, ??, or {m,n}? [...] match as little
text as possible.
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Rails migrations: self.up and self.down versus change
...me kind of operation you still need to define the down method, for example if you change the precision of a decimal column how to guess the original precision on rollback? It's not possible, so you need to define the down method.
As said, I suggest you to read the Rails Migrations Guide.
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When annotating a class with @Component, does this mean it is a Spring Bean and Singleton?
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Yes, that is correct, @Component is a Spring bean and a Singleton.
If the class belongs to the service layer you may want to annotate it with @Service instead
But have in mind that in order for these annotations to be detected, you need to place this line in applicationContext.xml:
<con...
Specifying a custom DateTime format when serializing with Json.Net
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You are on the right track. Since you said you can't modify the global settings, then the next best thing is to apply the JsonConverter attribute on an as-needed basis, as you suggested. It turns out Json.Net already has a built-in IsoDateTimeConverter that lets you specify the d...
Select the values of one property on all objects of an array in PowerShell
...oth the input collection and output array must fit into memory as a whole.
If the input collection is itself the result of a command (pipeline) (e.g., (Get-ChildItem).Name), that command must first run to completion before the resulting array's elements can be accessed.
In a pipeline where the r...
Git Tag list, display commit sha1 hashes
... SHA1 hash of the tag, followed by the tag name prefixed with refs/tags/.
If you want the SHA1 hash of the commit, instead of the tag object, you can run:
git show-ref --tags -d
This will produce output like:
0e76920bea4381cfc676825f3143fdd5fcf8c21f refs/tags/1.0.0
3e233dd8080617685992dc6346f73...
How to find out what group a given user has?
...y useful as well. It has more verbose output than the 'groups' command, so if you need the group id/user id use this!
– Alex Argo
Dec 8 '08 at 17:02
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ZSH complains about RVM __rvm_cleanse_variables: function definition file not found
...he -f flag, doesn't seem necessary to bypass the remove file confirmation (if the user has it set in the first place)
– pech0rin
Dec 5 '16 at 21:38
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AngularJS Directive Restrict A vs E
...template. The
common case for this is when you are creating a Domain-Specific
Language for parts of your template. Use an attribute when you are
decorating an existing element with new functionality.
Edit following comment on pitfalls for a complete answer:
Assuming you're building an app t...
How to prevent line breaks in list items using CSS
... this little snippet of code to add a nice "…" to the ending of the line if the content is to large to fit on one line:
li {
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
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