remove some text after - from string

Question

I want to remove some text from string or integer using javascipt or jquery..

I have string "flow-[s/c]", "flow-max[s/c]","flow-min[s/c]", "Usage-[s/c]", "temperature"

And I want for each : "flow", "flow-max","flow-min", "Usage", "temperature"

As you can see. I want to remove all the data after - found expect flow-max and flow-min

What I am doing :

var legendName = $(textElement).text().toLowerCase().replace(" ", "-");

Taking the legend Name example : "flow-[s/c]", "flow-max[s/c]"

var displayVal = legendName.split('-')[0];

remove all the data after - found

But I am not able to add condition for flow-max because at this case I will be having two - and two place like flow-min-[s/c]

Peter · Accepted Answer · 2015-03-06 09:51:38Z

2

var displayVal = $(textElement).text().replace(/\-?\[s\/c\]/, "");

The code /\-?\[s\/c\]/ is a regular expression, where:

/ at the start and end are the delimiters of the expression.
\ is an escape character, indicating that the following character should be taken literally (in our example we need it in front of -, [, / and ] because those are control character for regular expressions).
? means the previous character is optional.

So it replaces an optional dash (-) followed by the text [s/c], with an empty string.

edited Mar 6, 2015 at 9:51

answered Mar 5, 2015 at 13:45

Peter

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3 Comments

Peter Over a year ago

Or even shorter, but this might cause false positives: legendName.replace(/\-?\[.+/, "");

Peter Over a year ago

Could you please describe what the problem is, @JavascriptCoder? What results are you getting? What is your code?

Peter Over a year ago

I edited my code slightly, maybe it works better for you now?

Amit Joki · Accepted Answer · 2015-03-05 13:52:49Z

1

Just use this simple regex /(max|min)\[.*?]|-\[.*?]/g. The regex is simple, if you see what it does separately.

The logic has been separated by | operator.

legendName = legendName.replace(/(max|min)\[.*?]|-\[.*?]/, "$1");

edited Mar 5, 2015 at 13:52

answered Mar 5, 2015 at 13:43

Amit Joki

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1 Comment

Peter Over a year ago

No: "flow-max[s/c]".replace(/-\[.*?]/g,""); returns "flow-max[s/c]"

Crack_David · Accepted Answer · 2015-03-05 13:43:40Z

0

You can use lastoccur = legendName.lastIndexOf("-"); to find the last occur of "-" and then split your string.

Reference: http://www.w3schools.com/jsref/jsref_lastindexof.asp

answered Mar 5, 2015 at 13:43

Crack_David

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1 Comment

Peter Over a year ago

This won't work on flow-max[s/c], where the result needs to be flow-max, not flow.

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