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How can I concatenate regex literals in JavaScript?
...als, you can in fact concatenate them using this technique:
var regex1 = /foo/g;
var regex2 = /bar/y;
var flags = (regex1.flags + regex2.flags).split("").sort().join("").replace(/(.)(?=.*\1)/g, "");
var regex3 = new RegExp(expression_one.source + expression_two.source, flags);
// regex3 is now /foo...
Determine if a function exists in bash
...function, external command, or just not defined. Example:
$ LC_ALL=C type foo
bash: type: foo: not found
$ LC_ALL=C type ls
ls is aliased to `ls --color=auto'
$ which type
$ LC_ALL=C type type
type is a shell builtin
$ LC_ALL=C type -t rvm
function
$ if [ -n "$(LC_ALL=C type -t rvm)" ] &&a...
Accessing nested JavaScript objects and arays by string path
...e behavior as when no key is found in the provided object. eg _.get(null, "foo") -> undefined, _.get(null, "foo", "bar") -> "bar". However this behavior is not defined in the docs so subject to change.
– Ian Walker-Sperber
Nov 2 '17 at 0:40
...
Getting values from query string in an url using AngularJS $location
...e so:
$location.search().user
If you wish not to use a key, value like ?foo=bar, I suggest using a hash #test_user_bLzgB ,
and calling
$location.hash()
would return 'test_user_bLzgB' which is the data you wish to retrieve.
Additional info:
If you used the query string method and you are g...
How to display a specific user's commits in svn log?
... if you want to search more than one author, svn log --search foo --search bar -l 30 . If multiple --search options are provided, a log message is shown if it matches any of the provided search patterns.
– zhuguowei
Mar 17 '16 at 12:30
...
How does the const constructor actually work?
... meaningful sorting order.
This means that const expressions like const Foo(1, 1) can represent any usable form that is useful for comparison in virtual machine.
The VM only needs to take into account the value type and arguments in the order in which they occur in this const expression. And, of...
How do I get bash completion to work with aliases?
... shell and enjoy your alias auto completion! :)
– kpsfoo
Apr 5 '14 at 21:14
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JavaScript DOM remove element
...
If you are happy to use the brilliant function:
$("#foo").remove();
To completely delete the element from the DOM.
To remove the elements without removing data and events, use this instead:
$("#foo").detach();
jQuery Docs
The .remove() method takes elements out of the DOM. ...
How do you organise multiple git repositories, so that all of them are backed up together?
...synchronizing between the multiple parties:
$ cd ~/dev
$ git clone /repos/foo.git # or the one from github, ...
$ cd foo
$ git remote add github ...
$ git remote add memorystick ...
You can then fetch/pull from each of the "sources", work and commit
locally, and then push ("backup") to each...
Copying files from Docker container to host
...image - <<EOF
> FROM busybox
> WORKDIR /workdir
> RUN touch foo.txt bar.txt qux.txt
> EOF
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM busybox
---> 00f017a8c2a6
Step 2/3 : WORKDIR /workdir
---> Using cache
---> 36151d97f2c9
Step 3/3 : RUN touch foo.tx...