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How to change the type of a field?
...(x)) and then save the document again.
If you need to do this programmatically and entirely from the shell, you can use the find(...).forEach(function(x) {}) syntax.
In response to the second comment below. Change the field bad from a number to a string in collection foo.
db.foo.find( { 'bad' :...
Upgrade python packages from requirements.txt using pip command
How do I upgrade all my python packages from requirements.txt file using pip command?
13 Answers
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Should I use @EJB or @Inject
...se see comments for details.
I switched from @Inject to @EJB because @EJB allows circular injection whereas @Inject pukes on it.
Details: I needed @PostConstruct to call an @Asynchronous method but it would do so synchronously. The only way to make the asynchronous call was to have the original ca...
Fill remaining vertical space with CSS using display:flex
... <header>
header: sized to content
<br/>(but is it really?)
</header>
<div>
main content: fills remaining space<br> x
<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
<!-- unc...
How do synchronized static methods work in Java and can I use it for loading Hibernate entities?
If I have a util class with static methods that will call Hibernate functions to accomplish basic data access. I am wondering if making the method synchronized is the right approach to ensure thread-safety.
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Changing UIButton text
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@erdekhayser Actually, read-only properties CAN have read/write properties. I use the titlelabel's tag to pass an integer to a action method. Also see Apple's docs link Although this property is read-only, its own properties are read/write. U...
PHP Redirect with POST data
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Generate a form on Page B with all the required data and action set to Page C and submit it with JavaScript on page load. Your data will be sent to Page C without much hassle to the user.
This is the only way to do it. A redirect is a 303 HTTP header tha...
How can I access and process nested objects, arrays or JSON?
...as any string can be used as key in objects. The key-value pairs are also called the "properties".
Properties can be accessed either using dot notation
const value = obj.someProperty;
or bracket notation, if the property name would not be a valid JavaScript identifier name [spec], or the name is...
getting date format m-d-Y H:i:s.u from milliseconds
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I generally opt for the second form as it's easier to read and understand. Additionally, DateTime is far more flexible and robust than the date/time functions. Handling microseconds is a case-in-point.
– Herber...
Setting the MySQL root user password on OS X
I just installed MySQL on Mac OS X. The next step was setting the root user password, so I did this next:
23 Answers
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