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Questions tagged [substring]

Part of a string, or the function/method that returns part of a string

substring functions/methods come in basically two flavours:

  • The parameters to the function are start index and length.
    • SQL's version uses this flavour, notably using one-based indexing
  • The parameters to the function are start index and end index. C like languages (including Java) use this flavour, and all use zero-based indexing

Definition

  • A substring is a string contained in a given string.

  • The substring can start at any index of the given string and finish in any index within the given string following the start.

  • It can be an empty string, the entire given string, or (most likely) a shorter string completely encompassed by the given string.

See Also

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Finding a substring in a NSString object

I have an NSString object and I want to make a substring from it, by locating a word. For example, my string is: "The dog ate the cat", I want the program to locate the word "ate" and make a substring that will be "the cat". Can someone help me out…
Sagiftw
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How can I get a substring from position N to the last char in Ruby?

I'd like to get a substring from a string from position N to the end of the string. What's the way to do it in Ruby?
Only Bolivian Here
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Check if string contains any substring in an array in Ruby

I am using the Tmail library, and for each attachment in an email, when I do attachment.content_type, sometimes I get not just the content type but also the name. Examples: image/jpeg; name=example3.jpg image/jpeg; name=example.jpg image/jpeg;…
Hommer Smith
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Split String by delimiter position using oracle SQL

I have a string and I would like to split that string by delimiter at a certain position. For example, my String is F/P/O and the result I am looking for is: Therefore, I would like to separate the string by the furthest delimiter. Note: some of my…
Avinesh Kumar
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Is there a method like JavaScript's substr in Rust?

I looked at the Rust docs for String but I can't find a way to extract a substring. Is there a method like JavaScript's substr in Rust? If not, how would you implement it? str.substr(start[, length]) The closest is probably slice_unchecked but it…
laktak
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How to use string.substr() function?

I want to make a program that will read some number in string format and output it like this: if the number is 12345 it should then output 12 23 34 45 . I tried using the substr() function from the c++ string library, but it gives me strange results…
VaioIsBorn
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Ignore files with names starting with 'output'

I have a program that generates text files output1.txt, output2.txt, output3.txt, etc.. I want Git to ignore these files. I can't block text files, as I have some text files that shouldn't be ignored. Also, the files are dynamically generated (there…
user4302594
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.substring error: "is not a function"

I don't understand why I get an error message using the substring method to declare a variable. I want to use the first part of the URL in a comparison. Site: http://www.elizabet.nl/wordpress This is the part that's going wrong: var currentLocation…
Hannemaatje
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How to return part of string before a certain character?

If you look at the jsfiddle from question, var str = "Abc: Lorem ipsum sit amet"; str = str.substring(str.indexOf(":") + 1); This returns all characters after the :, how can I adjust this to return all the characters before the : something like var…
Smudger
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Find all possible substring in fastest way

For String A = "abcd" then answer should be {a,ab,abc,abcd,b,bc,bcd,c,cd,d} To find all the substring I have used following method for (int i = 0; i < A.length(); i++) { for (int j = i+1; j <= A.length(); j++) { …
user2228588
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Ruby idiom for substring from index until end of string

Just wondering if there's a Ruby idiom for extracting a substring from an index until the end of the string. I know of str[index..-1] which works by passing in a range object to the String's [] method but it's a little clunky. In python, for…
Sherwin Yu
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How to delete a substring using shell script

I have strings called: abc.out def.out How do I delete the substring .out In these strings? What command should I use? (Bourne Shell)
J0natthaaann
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Conditional substring in a Jinja2 template

When deploying with ansible, There's 1 specific case where I need to strip a string of a trailing -p substring. The string somemachine-prod-p should become somemachine-prod only if the -p is at the end. The substring function I saw I can use with…
Moshe
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selecting an array key based on partial string

I have an array and in that array I have an array key that looks like, show_me_160 this array key may change a little, so sometimes the page may load and the array key maybe show_me_120, I want to now is possible to just string match the array key…
sea_1987
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Splitting a file name into name,extension

I have the name of a file like this: name1.csv and I would like to extract two substrings of this string. One that stores the name1 in one variable and other that stores the extension, csv, without the dot in another variable. I have been searching…
Layla
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