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Replace multiple strings with multiple other strings
...j[matched];
});
jsfiddle example
Generalizing it
If you want to dynamically maintain the regex and just add future exchanges to the map, you can do this
new RegExp(Object.keys(mapObj).join("|"),"gi");
to generate the regex. So then it would look like this
var mapObj = {cat:"dog",dog:"goat"...
How to trim whitespace from a Bash variable?
... '
echo -e "length(FOO)==${#FOO}"
# > length(FOO)==16
How to remove all whitespace (denoted by [:space:] in tr):
FOO=' test test test '
FOO_NO_WHITESPACE="$(echo -e "${FOO}" | tr -d '[:space:]')"
echo -e "FOO_NO_WHITESPACE='${FOO_NO_WHITESPACE}'"
# > FOO_NO_WHITESPACE='testtesttest'
echo ...
How to Batch Rename Files in a macOS Terminal?
...g).
If you find yourself batch-renaming files frequently, consider installing a specialized tool such as the Perl-based rename utility.
On macOS you can install it using popular package manager Homebrew as follows:
brew install rename
Here's the equivalent of the command at the top using rena...
Repeat string to certain length
... that need to be // in Python 3? Or dropping the +1 and using an explicit call to a ceiling function would suffice. Also, a note: the string generated actually has an extra repetition when it divides evenly; the extra gets cut off by the splice. That confused me at first.
– jpm...
Why do you have to call .items() when iterating over a dictionary in Python?
...en that for every other type of builtin iterable that I can think of, x in foo only if i in for i in foo assumes the value of x at some point, I would say that it would be a very huge inconsistency.
– aaronasterling
Sep 19 '10 at 5:49
...
How do I check if a directory exists? “is_dir”, “file_exists” or both?
...post input and uses it as-is, plus makes 0777 dir, prolly not that safe at all ;P
– sEver
Aug 20 '13 at 16:45
2
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What's an elegant way to conditionally add a class to an HTML element in a view?
...sses where the boolean value evaluated to true.
Sample Usage
class_names(foo: true, bar: false, baz: some_truthy_variable)
# => "foo baz"
Other Use Cases
This helper can be used within ERB tags or with Rails helpers such as link_to.
<div class="<%= class_string(ok: @success) %>">...
How to use range-based for() loop with std::map?
... called structured bindings, which allows for the following:
std::map< foo, bar > testing = { /*...blah...*/ };
for ( const auto& [ k, v ] : testing )
{
std::cout << k << "=" << v << "\n";
}
...
Regular expression to match URLs in Java
...s.
*/
public class Patterns {
/**
* Regular expression to match all IANA top-level domains.
* List accurate as of 2011/07/18. List taken from:
* http://data.iana.org/TLD/tlds-alpha-by-domain.txt
* This pattern is auto-generated by frameworks/ex/common/tools/make-iana-tl...
Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
...ho "$f" | sed s/IMG/VACATION/)"; done
In this example, I am assuming that all your image files contain the string IMG and you want to replace IMG with VACATION.
The shell automatically evaluates *.jpg to all the matching files.
The second argument of mv (the new name of the file) is the output of t...