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Error handling principles for Node.js + Express.js applications?
... throw new Error('some error');
})
This example was shamelessly stolen from here.
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Convert object to JSON in Android
... Why we have no embedded method for toJson? But we have for fromJson ?
– M at
Nov 22 '17 at 10:31
try t...
Can't escape the backslash with regex?
...
From http://www.regular-expressions.info/charclass.html :
Note that the only special characters or metacharacters inside a character class are the closing bracket (]), the backslash (\\), the caret (^) and the hyphen (-). Th...
Does a UNIQUE constraint automatically create an INDEX on the field(s)?
...ike a regular index with added checking for uniqueness. Using SHOW INDEXES FROM customer you can see your unique keys are in fact B-tree type indexes.
A composite index on (email, user_id) is enough, you don't need a separate index on email only - MySQL can use leftmost parts of a composite index. ...
What is a “symbol” in Julia?
...ol type is kind of a vestigial organ – a leftover adaptation, inherited from Lisp, but no longer used for its original purpose. Ruby symbols have been co-opted for other purposes – as hash keys, to pull methods out of method tables – but symbols in Ruby are not used to represent variables.
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Nested rows with bootstrap grid system?
... open up a new .row inside of your column.
Here's a simple layout to work from:
<div class="container">
<div class="row">
<div class="col-xs-6">
<div class="big-box">image</div>
</div>
<div class="col-xs-6">
...
Drawable image on a canvas
... @Saveen: Are you sure? As far as I can remember, this is supposed to work from the earliest versions of Android.
– Gábor
Aug 18 '17 at 7:50
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How to add an extra source directory for maven to compile and include in the build jar?
...t to clarify, you should replace your maven-compiler-plugin with the lines from above...
– Colin
Nov 4 '14 at 16:11
Wo...
How do you use an identity file with rsync?
...sh-agent and ssh-add to load the key into memory. ssh will try identities from ssh-agent automatically if it can find them. Commands would be
eval $(ssh-agent) # Create agent and environment variables
ssh-add ~/.ssh/1234-identity
ssh-agent is a user daemon which holds unencrypted ssh keys in mem...
count members with jsonpath?
... you must count up the size of all the fields on your Object/Array, either from source code or web browser developer tools inspection of the response.
– cellepo
Sep 12 '19 at 21:51
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