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npm install errors with Error: ENOENT, chmod
I am trying to globally install an npm module I just published. Every time I try to install, either from npm or the folder, I get this error.
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Validating URL in Java
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The java.net.URL class is in fact not at all a good way of validating URLs. MalformedURLException is not thrown on all malformed URLs during construction. Catching IOException on java.net.URL#openConnection().connect() does not validate URL either, only tell wether ...
How to check if element has any children in Javascript?
... about child elements (as opposed to text nodes, attribute nodes, etc.) on all modern browsers (and IE8 — in fact, even IE6) you can do this: (thank you Florian!)
if (element.children.length > 0) { // Or just `if (element.children.length)`
// It has at least one element as a child
}
Tha...
PHP and Enumerations
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Depending upon use case, I would normally use something simple like the following:
abstract class DaysOfWeek
{
const Sunday = 0;
const Monday = 1;
// etc.
}
$today = DaysOfWeek::Sunday;
However, other use cases may require more validation of cons...
How to redirect to previous page in Ruby On Rails?
I have a page that lists all of the projects that has sortable headers and pagination.
7 Answers
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Convert String to SecureString
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All I see is *****
– Ian Boyd
Nov 21 '17 at 19:48
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Show percent % instead of counts in charts of categorical variables
...for 'ggplot count vs percentage histogram' so hopefully this helps distill all the information currently housed in comments on the accepted answer.
Remark: If hp is not set as a factor, ggplot returns:
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Running code in main thread from another thread
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No. If you subclass Handler (or use Handler.Callback interface) your handleMessage() method will ONLY be called for messages that have been posted using your handler. The main thread is using a different handler to post/process messages so there is no conflict.
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How do I apply the for-each loop to every character in a String?
...cost penalty.
From the documentation:
[toCharArray() returns] a newly allocated character array whose length is the length of this string and whose contents are initialized to contain the character sequence represented by this string.
There are more verbose ways of iterating over characters i...
Spring Cache @Cacheable - not working while calling from another method of the same bean
Spring cache is not working when calling cached method from another method of the same bean.
9 Answers
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