Difference between revisions of "S2 Cookbook: Strings"
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Foxfirefey (Talk | contribs) |
(Fixed code sample bug: index function counts from zero, so test with >= 0) |
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# This will print out "Location of fox: 19." | # This will print out "Location of fox: 19." | ||
var int fox_location = $foxy->index("fox"); | var int fox_location = $foxy->index("fox"); | ||
| − | if( $fox_location > 0 ) { | + | if( $fox_location >= 0 ) { |
print "<p>Location of fox: ${fox_location}.</p>"; | print "<p>Location of fox: ${fox_location}.</p>"; | ||
} else { | } else { | ||
| Line 60: | Line 60: | ||
# This will print out "No wolf to be found." | # This will print out "No wolf to be found." | ||
var int wolf_location = $foxy->index("wolf"); | var int wolf_location = $foxy->index("wolf"); | ||
| − | if( $wolf_location > 0 ) { | + | if( $wolf_location >= 0 ) { |
print "<p>Location of wolf: ${wolf_location}.</p>"; | print "<p>Location of wolf: ${wolf_location}.</p>"; | ||
} else { | } else { | ||
| Line 66: | Line 66: | ||
} | } | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| + | |||
| + | When you test to see if the substring was found in the string, remember that the <tt>index</tt> function starts counting from zero, not one, and returns -1 if it can't find a match. | ||
== Changing the case of a string == | == Changing the case of a string == | ||
Revision as of 07:20, 23 June 2010
Contents
- 1 Get the length of a string
- 2 Finding if a string starts or ends with another string
- 3 Finding a string in another string
- 4 Changing the case of a string
- 5 Comparing two strings to see if they are equal or not equal
- 6 Comparing two strings lexicographically (aka alphabetical order)
- 7 Splitting a string into pieces
- 8 Repeating a string
- 9 Replacing a string inside of another string
- 10 Reversing a string
Get the length of a string
var string x = "stylish"; # Get the length of our example string var int length = $x->length(); # Print out what the length is """The length of "$x" is ${length}.""";
Will print out:
The length of "stylish" is 7.
Finding if a string starts or ends with another string
var string foxy = "fox.png"; if( $foxy->ends_with( ".png" ) ) { print "<p>This is a PNG file.</p>"; } if( $foxy->starts_with( "fox" ) ) { print "<p>This is a picture of a fox.</p>"; }
Finding a string in another string
If you're just wanting to know if a string is in another string, use the contains string function:
var string foxy = "I am a quick brown fox."; # The string contains "fox", so the statement prints if( $foxy->contains("fox") ) { print "<p>I am a fox.</p>"; } # This string doesn't contain "wolf", so the statement doesn't print if( $foxy->contains("wolf") ) { print "<p>I am a wolf.</p>"; }
If you need to find the actual location of your substring in a string, you'll want to use the index string function.
var string foxy = "I am a quick brown fox."; # This will print out "Location of fox: 19." var int fox_location = $foxy->index("fox"); if( $fox_location >= 0 ) { print "<p>Location of fox: ${fox_location}.</p>"; } else { print "<p>No fox to be found.</p>"; } # This will print out "No wolf to be found." var int wolf_location = $foxy->index("wolf"); if( $wolf_location >= 0 ) { print "<p>Location of wolf: ${wolf_location}.</p>"; } else { print "<p>No wolf to be found.</p>"; }
When you test to see if the substring was found in the string, remember that the index function starts counting from zero, not one, and returns -1 if it can't find a match.
Changing the case of a string
There are three functions for this, lower, upper, and upperfirst.
var string lowercase = "fox"; var string proper = "Polite"; print "<p>Original lowercase: $lowercase</p>"; print "<p>Uppercase: " + $lowercase->upper() + "</p>"; print "<p>Upper first: " + $lowercase->upperfirst() + "</p>"; print "<p>Original uppercased: $proper</p>"; print "<p>Lowercase: " + $proper->lower() + "</p>";
Comparing two strings to see if they are equal or not equal
var string foxy = "fox"; if( $foxy == "fox" ) { print "<p>This is a fox.</p>"; } else { print "<p>This is not a fox.</p>"; }
Comparing two strings lexicographically (aka alphabetical order)
var string foxy = "fox"; var string wolfish = "wolf"; var int compare = $foxy->compare($wolfish); # Compare: -1 print "<p>Compare: $compare</p>"; # fox comes before wolf if( $compare == 0 ) { print "<p>$foxy and $wolfish are the same</p>"; } elseif ( $compare > 0 ) { print "<p>$foxy comes before $wolfish</p>"; } elseif ( $compare < 0 ) { print "<p>$foxy comes after $wolfish</p>"; }
Splitting a string into pieces
var string sentence = "one fish two fish red cow"; var string[] list = $sentence->split(" "); print "<p>"; # "one", "fish", "two", "fish", "", "red", "cow", foreach var string item ($list) { print """ "$item", """; } print "</p>";
Repeating a string
var string word = "replace me"; var int length = $word->length(); var string flourish = "*"; # I am replacing "replace me" with "**********". """<p>I am replacing "$word" with \"""" + $flourish->repeat( $length ) + """\".</p>""";
