I will receive an array of string-like below.
In each string, there may be three signs: $,%,* in the string
For example,
“I would $rather %be $happy, %if working in a chocolate factory”
“It is ok to play tennis”
“Tennis $is a good sport”
“AO is really *good sport”
However, there may be no signs in it, maybe only one sign in it.
There are only five cases in string,
1. no sign at all,
2. having $,% ;
3. having only $,
4 having only %,
5 having only *
If there is no sign, I don’t need to process it.
Otherwise, I need to process it and add an indicator to the left of the first sign that occurs in the sentence.
For example:
“I would ---dollorAndperSign—-$rather %be $happy, %if working in a chocolate factory”
“Tennis --dollorSign—-$is a good sport”
This is my idea code.
So, I need to decide if the string contains any sign. If there is no sign, I don’t need to process it.
texts.map((text) => {
if (text.includes("$") || text.includes("%") || text.includes("*")) {
//to get the index of signs
let indexOfdollar, indexOfper, indexOfStar;
indexOfdollar = text.indexOf("$");
indexOfper = text.indexOf("%");
indexOfStar = text.indexOf("*");
//return a completed process text
}
});
Question:
how do I know which index is the smallest one in order to locate the position of the first sign occurring in the text? Getting the smallest value may not be the correct approach coz there may be the case that I will get -1 from the above code?
I focussed only on the "get the smallest index" part of your question... Since you will be able to do what you want with it after.
You can have the indexOf() in an array, filter it to remove the -1 and then use Math.min() to get the smallest one.
Edited to output an object instead, which includes the first index and some booleans for the presence each char.
const texts = [
"I would $rather %be $happy, %if working in a chocolate factory",
"It is ok to play tennis",
"Tennis $is a good sport",
"AO is really *good sport"
]
const minIndexes = texts.map((text,i) => {
//to get the signs
const hasDollard = text.indexOf("$") >= 0
const hasPercent = text.indexOf("%") >= 0
const hasStar = text.indexOf("*") >= 0
//to get the first index
const indexes = [text.indexOf("$"), text.indexOf("%"), text.indexOf("*")].filter((index) => index >= 0)
if(!indexes.length){
return null
}
return {
index: Math.min( ...indexes),
hasDollard,
hasPercent,
hasStar
}
});
console.log(minIndexes)You could find the special characters and replace the first found with a text.
const
replace = s => {
const
signs = { $: 'dollar', '%': 'per', '*': 'star' },
characters = s.match(/[\$\%\*]/g)?.join('') || '',
text = Array
.from(
new Set(Array.from(characters)),
c => signs[c]
)
.join('And') + 'Sign';
return s.replace(/[\$\%\*]/, `--${text}--$&`);
},
data = ['I would $rather %be $happy, %if working in chocolate factory', 'It is ok to play tennis', 'Tennis $is a good sport', 'AO is really *good sport'],
result = data.map(replace);
console.log(result);const texts = [
"I would $rather %be $happy, %if working in a chocolate factory",
"It is ok to play tennis",
"Tennis $is a good sport",
"AO is really *good sport"
]
texts.forEach(text => {
let sighs = ["%","$","*"];
let chr = text.split('').find(t => sighs.find(s => s==t));
if (!chr)
return;
text = text.replace(chr, "---some text---" + chr);
console.log(text);
})