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When is .then(success, fail) considered an antipattern for promises?
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What's the difference?
The .then() call will return a promise that will be rejected in case the callback throws an error. This means, when your success logger fails, the error would be passed to the following .catch() callback, but not to the fail callback that...
How can I clear or empty a StringBuilder? [duplicate]
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Two ways that work:
Use stringBuilderObj.setLength(0).
Allocate a new one with new StringBuilder() instead of clearing the buffer.
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How can I easily view the contents of a datatable or dataview in the immediate window
... four standard visualizers. These are the text, HTML, and XML visualizers, all of which work on string objects, and the dataset visualizer, which works for DataSet, DataView, and DataTable objects.
To use it, break into your code, mouse over your DataSet, expand the quick watch, view the Tables, ex...
Extract digits from a string in Java
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You can use regex and delete non-digits.
str = str.replaceAll("\\D+","");
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Check if Internet Connection Exists with Javascript? [duplicate]
...browsers, doing so with older web browsers may not work as expected, or at all.
Alternatively, an XHR request to your own server isn't that bad of a method for testing your connectivity. Considering one of the other answers state that there are too many points of failure for an XHR, if your XHR is ...
How to do a safe join pathname in ruby?
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One thing to note. Ruby uses a "/" for file separator on all platforms, including Windows, so you don't actually need use different code for joining things together on different platforms. "C:/tmp/1.text" should work fine.
File.join() is your friend for joining paths together.
p...
Aborting a shell script if any command returns a non-zero value?
...vokes a number of commands.
I would like to have the shell script automatically exit with a return value of 1 if any of the commands return a non-zero value.
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HTML text-overflow ellipsis detection
I have a collection of block elements on a page. They all have the CSS rules white-space, overflow, text-overflow set so that overflowing text is trimmed and an ellipsis is used.
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How can a Java variable be different from itself?
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Heh, this totally answers the question as asked.
– Dave Newton
Oct 17 '13 at 1:20
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Java: how can I split an ArrayList in multiple small ArrayLists?
...ist are reflected in this list, and vice-versa. The returned list supports all of the optional list operations supported by this list.
Example:
List<Integer> numbers = new ArrayList<Integer>(
Arrays.asList(5,3,1,2,9,5,0,7)
);
List<Integer> head = numbers.subList(0, 4);
List...