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stringd
Advanced tools
Readme
NodeJS String Variable Parser
Create parsable strings using template formats by argument mapping.
Similar to printf but supports nesting and exclusive recursions
Via NPM:
npm install stringd
import stringd from 'stringd';
stringd('Hello :{name}', {name: 'World'});
// Hello World
stringd(':{last}, :{first} :{last}', {last: 'Doe', first: 'John'});
// Doe, John Doe
Parse the tmp
string, replacing variable sections with flexibly defined values within the props
object
String tags within the ignore
array are skipped in the process. (used specifically to avoid repetition/recursion)
Whichever is more comfortable for you would work just fine
stringd('Hello :{name}', {name: 'World'}); // Hello World
stringd('Hello %{name}', {name: 'World'}); // Hello World
stringd('Hello ${name}', {name: 'World'}); // Hello World
stringd('Hello :{name%}', {name: 'World'}); // Hello World
stringd('Hello %{name%}', {name: 'World'}); // Hello World
stringd('Hello ${name%}', {name: 'World'}); // Hello World
assert.equal('John Davis', stringd(':{name}', {
name: ':{first} :{last}',
last: 'Davis',
first: 'John',
}));
assert.equal(
'Age Difference = [32 + 25] = [57]',
stringd(
stringd('Age Difference = [:{age1} + :{age2}] = [:{add(:{age1}, :{age2})}]', {
age1: 32,
age2: 25,
}),
{add: (_, data) => data.args.reduce((a, v) => a + +v.trim(), 0)},
),
);
assert.equal(
'Hello, Guys; Hello, World. How are you doing?',
stringd(':{greet(Guys, post=How are you doing?, World)}', {
greet: (_, names) =>
names.args
.map(name => `Hello, ${name.trim()}`)
.join('; ')
.concat('. ', names.matched.post),
}),
);
assert.equal(
'Hello John Davis, you have contributed $585 in the span of 13 months',
stringd(':{name:parsed}', {
name: ':{first} :{last}',
last: 'Davis',
first: 'John',
greeting: 'Hello :{name}',
months: 13,
duration: ':{months} months',
contribution: 45,
// Functions get the entire template object as an argument
// so you can do advanced processing
cash: ({contribution, months}) => contribution * months,
'name:parsed': `:{greeting}, you have contributed $:{cash} in the span of :{duration}`,
})
);
assert.equal(' 10', stringd(':5{val}', {val: 10}));
assert.equal('10 ', stringd(':-5{val}', {val: 10}));
assert.equal('00010', stringd(':05{val}', {val: 10}));
assert.equal('10000', stringd(':-05{val}', {val: 10}));
Recursive nesting is unparsed at the second level, otherwise, it continues until its done parsing the entire string
assert.equal(
'James:{name} :{name} :{data} :{data} :{all} :{name} :{data}Jack James:{data}Jack James:{data}Jack :{misc} :{data} :{all} James:{data}Jack :{misc}',
stringd(':{name} :{misc}', {
name: ':{first}:{data}:{last}',
first: 'James',
last: 'Jack',
misc: ':{data}',
data: ':{name} :{all}',
all: ':{name} :{misc} :{data} :{all} :{name} :{misc}',
})
);
assert.equal(' 2364', stringd(stringd('::{pad}{price}', {pad: 10}), {price: 2364}))
stringd
replaces keys in order precedence. Keys that appear first are replaced first
stringd( // str key appears first
stringd(':{tro:{str}}', {str: 'y', 'tro:{str}': ':{tron}'}),
{ tron: 'Movie', troy: 'Dude' }
); // Dude
stringd( // str key appears later
stringd(':{tro:{str}}', {'tro:{str}': ':{tron}', str: 'y'}),
{ tron: 'Movie', troy: 'Dude' }
); // Movie
Feel free to clone, use in adherance to the license. Pull requests are very much welcome.
git clone https://github.com/miraclx/stringd.git
cd stringd
npm install
# hack on code
npm test
Tests are executed with Jest. To use it, simple run npm install
, it will install
Jest and its dependencies in your project's node_modules
directory and finally npm test
.
To run the tests:
npm install
npm test
Apache 2.0 © Miraculous Owonubi (@miraclx) <omiraculous@gmail.com>
FAQs
A string variable parser for JavaScript
The npm package stringd receives a total of 1,748 weekly downloads. As such, stringd popularity was classified as popular.
We found that stringd demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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