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String manipulation

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craigward

craigward

Programmer
Nov 13, 2007
230
GB
Hi,

I have a string that will vary in length but there will always be a consistent pattern.

Var String = “value a; value b; value c;”

This string could go on with additional value value e; value f; etc etc.

What I need to do is to take that variable “string” and create a new variable and alter the values in the string. Again it will always be consistent value I will be creating from it.

For example the above var string will need to look like newstring below, it is building a SQL query actually:

Var newstring = “ car like ‘%value a % OR car like ‘%value b % OR car like ‘%value c %’

And if there were more values I would need it to keep building the string dynamically.

What is the best method for me to do this and does anyone have some sample code I can work with?

Thanks for looking.
 
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Hi

Are you sure you need JavaScript ?
[ul]
[li]You used a "Var" keyword, which is invalid in JavaScript.[/li]
[li]As most SQL is executed server-side, sounds pointless to generate SQL statements in JavaScript.[/li]
[/ul]
Until you confirm you really need JavaScript, here is a simple JavaScript 1.6 solution ( supported by Explorer only since version 9 ) :
JavaScript: 
newstring[teal]=[/teal]String
  [teal].[/teal][COLOR=darkgoldenrod]split[/color][teal]([/teal][fuchsia]/ *; */[/fuchsia][teal])[/teal]
  [teal].[/teal][COLOR=darkgoldenrod]filter[/color][teal]([/teal][b]function[/b][teal]([/teal]p[teal])[/teal][teal]{[/teal][b]return[/b] p[teal].[/teal][COLOR=darkgoldenrod]trim[/color][teal]()[/teal][teal]}[/teal][teal])[/teal]
  [teal].[/teal][COLOR=darkgoldenrod]map[/color][teal]([/teal][b]function[/b][teal]([/teal]p[teal])[/teal][teal]{[/teal][b]return[/b] [green][i]"car like '%"[/i][/green][teal]+[/teal]p[teal].[/teal][COLOR=darkgoldenrod]replace[/color][teal]([/teal][fuchsia]/['\\]/g[/fuchsia][teal],[/teal][green][i]'[/i][/green][lime][i]\\[/i][/lime][green][i]$&'[/i][/green][teal])+[/teal][green][i]" %'"[/i][/green][teal]}[/teal][teal])[/teal]
  [teal].[/teal][COLOR=darkgoldenrod]join[/color][teal]([/teal][green][i]' or '[/i][/green][teal])[/teal]

Feherke.
feherke.github.io
 
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Sorry, yes it is JavaScript. I put Var by mistake because i am using vb-script for something else. I have to have this string formatted for my SQL query because i pass that to another page and at that point it has to be correctly formatted for SQL.

I will try your script and see how i get on. Many thanks.
 
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well 'var' in and of itself isn't incorrect, it's just the upper casing on the 'V' that's the issue.




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Hi,

I have tried the following code and must have something wrong as the result is not correct.

I am only building part of an SQL query here and when passed to the next page that is added to the full query.

Thanks for looking

Code: 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"[URL unfurl="true"]http://www.w3.org/TR/html4/loose.dtd">[/URL]
<html>
<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script language="JavaScript">
function test(){

string = "value a; value b; value c;"

newstring=String
  .split(/ *; */)
  .filter(function(p){return p.trim()})
  .map(function(p){return "car like '%"+p.replace(/['\\]/g,'\\$&')+" %'"})
  .join(' or ') 
  
  alert(newstring)
  
  
}

</script>
</head>

<body onload="test()">

</table>
</body>
</html>
 
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Perfect, thank you so much that is a great function to know.
 
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