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Define a lambda expression that raises an Exception
...ur goal is to avoid a def, this obviously doesn't cut it. It does, however allow you to conditionally raise exceptions, e.g.:
y = lambda x: 2*x if x < 10 else raise_(Exception('foobar'))
Alternatively you can raise an exception without defining a named function. All you need is a strong stom...
Using margin:auto to vertically-align a div
So I know we can center a div horizontally if we use margin:0 auto; . Should margin:auto auto; work how I think it should work? Centering it vertically as well?
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Get HTML5 localStorage keys
I'm just wondering how to get all key values in localStorage .
12 Answers
12
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Why do access tokens expire?
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This is very much implementation specific, but the general idea is to allow providers to issue short term access tokens with long term refresh tokens. Why?
Many providers support bearer tokens which are very weak security-wise. By making them short-lived and requiring refresh, they limit the ...
Convert SQLITE SQL dump file to POSTGRESQL
...h a sequence to that column so that INSERTs with NULL ids will be automatically assigned the next available value. PostgreSQL will also not recognize AUTOINCREMENT commands, so these need to be removed.
You'll also want to check for datetime columns in the SQLite schema and change them to timestamp ...
Should composer.lock be committed to version control?
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If you update your libs, you want to commit the lockfile too. It basically states that your project is locked to those specific versions of the libs you are using.
If you commit your changes, and someone pulls your code and updates the dependencies, the lockfile should be unmodified. If it is ...
Nodejs - Redirect url
...'/login') merely sends the login.html content in the response of the ajax call made. How do I rather open the page?
– Tarun
Oct 24 '16 at 20:03
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Python: TypeError: cannot concatenate 'str' and 'int' objects [duplicate]
...ed by the last print statement.
You can assign the result of the str(c) call to c as correctly shown by @jamylak and then concatenate all of the strings, or you can replace the last print simply with this:
print "a + b as integers: ", c # note the comma here
in which case
str(c)
isn't nece...
C: differences between char pointer and array [duplicate]
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True, but it's a subtle difference. Essentially, the former:
char amessage[] = "now is the time";
Defines an array whose members live in the current scope's stack space, whereas:
char *pmessage = "now is the time";
Defines a pointer that lives in the current sco...
Understanding prototypal inheritance in JavaScript
...ctor or in the prototype. Using the prototype is more efficient because usually you need a function only once per type.
The new call in javascript automatically sets the constructor in the prototype. If you are overwriting the prototype so you have to set the constructor manually.
Inheritance in j...