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Using Java 8 to convert a list of objects into a string obtained from the toString() method
...dd(2);
list.add(3);
StringBuilder b = new StringBuilder();
list.forEach(b::append);
System.out.println(b);
you can also try:
String s = list.stream().map(e -> e.toString()).reduce("", String::concat);
Explanation: map converts Integer stream to String stream, then its reduced a...
Open a buffer as a vertical split in VIM
... I always feel like there should be a vsbuffer too, and I also often forget Ctrl-w T to open a buffer in a new tab (or I want to do that with a buffer that's not currently active or visible). So as an alternative, you can use a bar for either of these cases, which I find easier to remember than...
How to pipe list of files returned by find command to cat to view all the files
...ocess as command line arguments to another process
command2 `command1`
for example:
cat `find . -name '*.foo' -print`
(Note these are BACK-QUOTES not regular quotes (under the tilde ~ on my keyboard).)
This will send the output of command1 into command2 as command line arguments. Note that fi...
How to get the browser to navigate to URL in JavaScript [duplicate]
What is the best (correct, modern, cross-browser, safe) way to get a web browser to navigate to a URL of your choice using JavaScript?
...
Why doesn't a python dict.update() return the object?
...
Python's mostly implementing a pragmatically tinged flavor of command-query separation: mutators return None (with pragmatically induced exceptions such as pop;-) so they can't possibly be confused with accessors (and in the same vein, assignment is not an expression, the statemen...
How to get the last element of an array in Ruby?
...nt backward from the end of the array):
a[-1] # => 5
b[-1] # => 6
or Array#last method:
a.last # => 5
b.last # => 6
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Comparing two CGRects
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Use this:
if (CGRectEqualToRect(self.view.frame, rect)) {
// do some stuff
}
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Java 8: How do I work with exception throwing methods in streams?
.... You can still throw anything that is a subclass of RuntimeException.
A normal wrapping idiom is something like:
private void safeFoo(final A a) {
try {
a.foo();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
(Supertype exception Exception is only used ...
Print string to text file
....close()
If you use a context manager, the file is closed automatically for you
with open("Output.txt", "w") as text_file:
text_file.write("Purchase Amount: %s" % TotalAmount)
If you're using Python2.6 or higher, it's preferred to use str.format()
with open("Output.txt", "w") as text_file:...
In a PHP project, what patterns exist to store, access and organize helper objects? [closed]
How do you organize and manage your helper objects like the database engine, user notification, error handling and so on in a PHP based, object oriented project?
...