Case 1: String str = “Good”; str = str + ” Morning”; In the above code you create 3 String Objects. “Good” it goes into the String Pool. ” Morning” it goes into the String Pool as well. “Good Morning” created by concatenating “Good” and ” Morning”. This guy goes on the Heap. Note: Strings … Read more
You can pass arrays as parameters to str_replace(). Check the manual. // Provides: You should eat pizza, beer, and ice cream every day $phrase = “You should eat fruits, vegetables, and fiber every day.”; $healthy = [“fruits”, “vegetables”, “fiber”]; $yummy = [“pizza”, “beer”, “ice cream”]; $newPhrase = str_replace($healthy, $yummy, $phrase);
Compressed strings (Java 6) and compact strings (Java 9) both have the same motivation (strings are often effectively Latin-1, so half the space is wasted) and goal (make those strings small) but the implementations differ a lot. Compressed Strings In an interview Aleksey Shipilëv (who was in charge of implementing the Java 9 feature) had … Read more
Without using regex, something like this should work for returning the string positions: $html = “dddasdfdddasdffff”; $needle = “asdf”; $lastPos = 0; $positions = array(); while (($lastPos = strpos($html, $needle, $lastPos))!== false) { $positions[] = $lastPos; $lastPos = $lastPos + strlen($needle); } // Displays 3 and 10 foreach ($positions as $value) { echo $value .”<br … Read more
StringJoiner is very useful, when you need to join Strings in a Stream. As an example, if you have to following List of Strings: final List<String> strings = Arrays.asList(“Foo”, “Bar”, “Baz”); It is much more simpler to use final String collectJoin = strings.stream().collect(Collectors.joining(“, “)); as it would be with a StringBuilder: final String collectBuilder = … Read more
Check if string is nonnegative digit (integer) and alphabet You may use str.isdigit() and str.isalpha() to check whether a given string is a nonnegative integer (0 or greater) and alphabetical character, respectively. Sample Results: # For alphabet >>> ‘A’.isdigit() False >>> ‘A’.isalpha() True # For digit >>> ‘1’.isdigit() True >>> ‘1’.isalpha() False Check for strings … Read more
The replaceAll method is attempting to match the String literal [] which does not exist within the String try replacing these items separately. String str = “[Chrissman-@1]”; str = str.replaceAll(“\\[“, “”).replaceAll(“\\]”,””);
Using the getBytes method, giving it the appropriate Charset (or Charset name). Example: String s = “Hello, there.”; byte[] b = s.getBytes(StandardCharsets.US_ASCII); If more control is required (such as throwing an exception when a character outside the 7 bit US-ASCII is encountered) then CharsetDecoder can be used: private static byte[] strictStringToBytes(String s, Charset charset) throws … Read more
Use this code numberOnly will contain your desired output. String str=”sdfvsdf68fsdfsf8999fsdf09″; String numberOnly= str.replaceAll(“[^0-9]”, “”);
Using a regular expression you can count the number of lines as str.split(/\r\n|\r|\n/).length Alternately you can try split method as below. var lines = $(“#ptest”).val().split(“\n”); alert(lines.length); working solution: http://jsfiddle.net/C8CaX/