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Multiplication on command line terminal
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By the way (for future readers), my example should have shown non-integer operands instead of only a non-integer result in order to accurately counter the assertion. Never fear, echo '4 k 50.5 7 / p' | dc works (output: 7.2142).
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Check whether a string matches a regex in JS
...})$/)) {
alert("match!");
}
But test() seems to be faster as you can read here.
Important difference between match() and test():
match() works only with strings, but test() works also with integers.
12345.match(/^([a-z0-9]{5,})$/); // ERROR
/^([a-z0-9]{5,})$/.test(12345); // true
/^([a-z0-...
byte[] to file in Java
...esources statement to avoid leaking resources and make your code easier to read. More on that here.
To write your byteArray to a file you would do:
try (FileOutputStream fos = new FileOutputStream("fullPathToFile")) {
fos.write(byteArray);
} catch (IOException ioe) {
ioe.printStackTrace();...
What is path of JDK on Mac ? [duplicate]
...ualMachines/jdk1.7.0_25.jdk/Contents/Home/bin/java
and therefrom you can read the Java home directory;
if usr/bin/java points to another symbolic link, recursively apply the same approach with
ls -l <whatever the /usr/bin/java symlink points to>
An important variation is the setup you ...
Git error on git pull (unable to update local ref)
... is basically what you were saying although it wasn't obvious to me when I read this.
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Add up a column of numbers at the Unix shell
...rrect of course - it was easier just to append on to the end of what was already there :-)
– Greg Reynolds
Jun 1 '09 at 10:05
2
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RabbitMQ and relationship between channel and connection
...s.
You can use one Channel for everything. However, if you have multiple threads, it's suggested to use a different Channel for each thread.
Channel thread-safety in Java Client API Guide:
Channel instances are safe for use by multiple threads. Requests into
a Channel are serialized, with on...
Pass props to parent component in React.js
...ss a child's props to its parent using events, in React.js?
The parent already has that child prop!: if the child has a prop, then it is because its parent provided that prop to the child! Why do you want the child to pass back the prop to the parent, while the parent obviously already has that pr...
jQuery .on('change', function() {} not triggering for dynamically created inputs
...expected. Also, it is better to specify some element instead of document.
Read this article for better understanding: http://elijahmanor.com/differences-between-jquery-bind-vs-live-vs-delegate-vs-on/
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How to get all columns' names for all the tables in MySQL?
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Anyone reading this in 2016 - mysql_query has become deprecated. Best to use PHP's mysqli going forward.
– JCutting8
Jul 31 '16 at 2:50
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