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Adding up BigDecimals using Streams
...sn't filter for null values. The correct answer should prevent null values by using the Object::nonNull function as a predicate.
BigDecimal result = invoiceList.stream()
.map(Invoice::total)
.filter(Objects::nonNull)
.filter(i -> (i.getUnit_price() != null) && (i.getQuantity...
A gentle tutorial to Emacs/Swank/Paredit for Clojure
...- a buffer will pop up with information on the current major mode followed by information on all active minor modes (paredit is one of those).
Update: I've just found this cool set of notes on Paredit by Phil Hagelberg... That's a link to a text file, I remember seeing a nice set of slides with thi...
Will Dispose() be called in a using statement with a null object?
...ore Disposing the reference will be null-checked. You can examine yourself by viewing your code in Reflector.
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Running two projects at once in Visual Studio
... Works in VS 2015 CE as well.
– Payton Byrd
Nov 30 '15 at 3:36
2
Can't get this to ...
E11000 duplicate key error index in mongodb mongoose
... out how to solve this...rather than run into this issue once you have gigabytes of user data already stored
– Janac Meena
Jun 5 '18 at 14:20
...
How to handle initializing and rendering subviews in Backbone.js?
...lements the child views rely on already exist before I try to assign them. By doing this, I know all child events will be correctly set, and I can re-render their blocks as many times as I want without worrying about having to re-delegate anything. I do not actually render any child views here, I al...
Benefits of header-only libraries
...compiling your library before using it.
Of course, this applies on a case-by-case basis. For example, header-only libraries sometimes increase code size & compilation times.
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Android static object lifecycle
...ic variable: A static variable comes into existence when a class is loaded by the JVM and dies when the class is unloaded.
So if you create an android application and initialize a static variable, it will remain in the JVM until one of the following happens:
1. the class is unloaded
2. the JVM shut...
Why does z-index not work?
...n older versions of Chrome under a custom flag, and is under consideration by Microsoft to add to their Edge browser.
Important
For regular positioning, be sure to include position: relative on the elements where you also set the z-index. Otherwise, it won't take effect.
...
Batch files - number of command line arguments
...also uses a nifty trick, passing the name of the return variable to be set by the function.
The main program just illustrates how to call it and echos the arguments afterwards to ensure that they're untouched:
C:\Here> xx.cmd 1 2 3 4 5
Count is 5
Args are 1 2 3 4 5
C:\Here> xx.cmd 1 ...