How to get the string just before specific character in JavaScript?

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I have couple of strings like this:

  • Mar18L7
  • Oct13H0L7

I need to grab the string like:

  • Mar18
  • Oct13H0

Could any one please help on this using JavaScript? How can I split the string at the particular character?

Many Thanks in advance.

For var str = 'Mar18L7';

Try any of these:

  1. str.substr(0, str.indexOf('L7'));

  2. str.split('L7')[0]

  3. str.slice(0, str.indexOf('L7'))

  4. str.replace('L7', '')

How do I have JavaScript get a substring before a character?, split() returns an array of strings, split by the character you pass to it (in your case, the plus). Just use the first element of the array; it will have  Because strings must be written within quotes, JavaScript will misunderstand this string: var x = "We are the so-called "Vikings" from the north."; The string will be chopped to "We are the so-called ". The solution to avoid this problem, is to use the backslash escape character.

Based on input that is given it I have created following function which can take n string in array and return the output in the format you have given. Check if this helps and if some use case is missed.

function generateStr(arr, splitStr) {
  const processedStr = arr.map(value => value.split(splitStr)[0]);
  return processedStr.join(" OR ");
}

console.log(generateStr(["Mar18L7", "Oct13H0L7"], "L7"));

javascript get string before a character, This is the what you should use to split: string.slice(0, string.indexOf("'"));. And then to handle your non existant value edge case: function  Pads the current string from the start with a given string and returns a new string of the length targetLength. String.prototype.repeat( count ) Returns a string consisting of the elements of the object repeated count times.

You can use a regex like this

var data = ["Mar18L7", "Oct13H0L7"];
var regex = /^([a-zA-Z0-9]+)\L[a-zA-Z0-9]+$/;
var output = []
data.forEach(function(el){
    var matches = el.match(regex);
    output.push(matches[1]);
}); 

output variable will be equal to ['Mar18', 'Oct13H0'] and you can join all value usin the .join method on output array

var chain = output.join(" OR ");
// chain will be equal to "Mar18 OR Oct13H0"

JavaScript String substr() Method, The substr() method extracts parts of a string, beginning at the character at the specified position, and returns the specified number of characters. Tip: To extract characters from the end of the string, use a negative start number Note: The substr() method does not change the original string. Extract only the first character:. I'm trying to extract the number before character "M" in a series of strings. The strings may look like: "107S33M15H" "33M100S" "12M100H33M" so basically there would be a sets of numbers separated by different characters, and "M" may show up more than once. For the example here, I would like my code to return:

JavaScript String substring() Method, The substring() method extracts the characters from a string, between two specified indices, and returns the new sub string. This method extracts the characters in a string Example. Extract only the first character: var str = "Hello world!"; The easiest way is probably just to split on your target word. my_string="hello python world , i'm a beginner " print my_string.split("world",1) [1] split takes the word (or character) to split on and optionally a limit to the number of splits. In this example split on "world" and limit it to only one split. improve this answer.

JavaScript: Get a part of string after a specified character, JavaScript: Get a part of string after a specified character. Last update on February 26 indexOf(char) + 1); else if(pos=='a') return str.substring(0, str.​indexOf(char)); else JavaScript: Tips of the Day. Returns true if the given  In this case, to remove all before the > character, just search for "*> " (without the quotes) and replace with nothing. Then all characters before "> " are removed. The opposite is also easy. To remove everything after the > character, just search for ">*" (without the quotes) and replace with nothing. Printer friendly version. You may also like:

String.prototype.substring(), The index of the first character to exclude from the returned substring. Return value. A new string containing the specified part of the given string. Get Substring - everything before certain char. Asked 10 years, 2 months ago. Active yesterday. Viewed 258k times. I'm trying to figure out the best way to get everything before the - character in a string. Some example strings are below. The length of the string before - varies and can be any length. 223232-1.jpg 443-2.jpg 34443553-5.jpg.

Comments
  • input.split("L")[0]...?
  • Might not work in case of April18L7. Just in case there's a longer version of Month names somewhere.
  • Apart from L7 is there some other sample input you can provide so that we can generalise solution.
  • @ShubhamGupta thanks for suggestion we have some more like this Apr12R0 or Jun12R0
  • @SiddAjmera thanks for your input, for april we denote like first three letters like this. Apr..
  • You are welcome, can you choose one of all answer like response to your issue