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What is the fundamental difference between WebSockets and pure TCP?
...have control over the machines on that network and can open ports suitable for making the TCP connections.
Over the internet, you're communicating with someone else's server on the other end. They are extremely unlikely to have any old socket open for connections. Usually they will have only a few ...
Why does using an Underscore character in a LIKE filter give me all the results?
... characters. Here you define the escape character with the escape keyword. For details see this link on Oracle Docs.
The '_' and '%' are wildcards in a LIKE operated statement in SQL.
The _ character looks for a presence of (any) one single character. If you search by columnName LIKE '_abc', it wi...
How do I create an immutable Class?
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I think you're on the right track -
all information injected into the class should be supplied in the constructor
all properties should be getters only
if a collection (or Array) is passed into the constructor, it should be copied to keep the caller from modifying it...
Vim: Move cursor to its last position
... its previous position (while in normal mode)? Something to cycle back and forth in the list of previous cursor positions would be ideal. But also just to switch to the last location would suffice (something like cd - in bash with directories).
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BigDecimal setScale and round
...constructor only accepts precision and RoundingMode as arguments, and therefore scale is never specified in the first statement.
setScale() obviously accepts scale as an argument, as well as RoundingMode, however precision is never specified in the second statement.
If you move the decimal point o...
Jasmine.js comparing arrays
Is there a way in jasmine.js to check if two arrays are equal, for example:
4 Answers
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How to escape a single quote inside awk
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This maybe what you're looking for:
awk 'BEGIN {FS=" ";} {printf "'\''%s'\'' ", $1}'
That is, with '\'' you close the opening ', then print a literal ' by escaping it and finally open the ' again.
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How to switch back to 'master' with git?
...ed to checkout the branch:
git checkout master
See the Git cheat sheets for more information.
Edit: Please note that git does not manage empty directories, so you'll have to manage them yourself. If your directory is empty, just remove it directly.
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Is there a date format to display the day of the week in java?
I know of date formats such as
"yyyy-mm-dd" -which displays date in format 2011-02-26
"yyyy-MMM-dd" -which displays date in format 2011-FEB-26
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What is the difference between isinstance('aaa', basestring) and isinstance('aaa', str)?
...t characters outside of the Latin alphabet (ignoring details of code pages for simplicity). Unicode strings (unicode) can represent characters from any alphabet including some fictional ones like Klingon.
So why have two kinds of strings, would it not be better to just have Unicode since that would...