Test if characters are in a string

Use the grepl function

grepl( needle, haystack, fixed = TRUE)

like so:

grepl(value, chars, fixed = TRUE)
# TRUE

Use ?grepl to find out more.

Related Posts:

  1. OR condition in Regex
  2. Using or ‘|’ in regex [duplicate]
  3. What is a Context Free Grammar?
  4. What does \’.- mean in a Regular Expression
  5. How can I exclude one word with grep?
  6. Regular expression to match a line that doesn’t contain a word
  7. Difference between \b and \B in regex
  8. Regex: ignore case sensitivity
  9. What does the regex \S mean in JavaScript?
  10. How can I validate an email address using a regular expression?
  11. Regex: ignore case sensitivity
  12. Python regex AttributeError: ‘NoneType’ object has no attribute ‘group’
  13. Regular Expression for alphanumeric and underscores
  14. Regular Expression for alphanumeric and underscores
  15. Regex AND operator
  16. python re.split() to split by spaces, commas, and periods, but not in cases like 1,000 or 1.50
  17. Regex to test if string begins with http:// or https://
  18. Regular Expression to match string starting with a specific word
  19. Writing a very simple lexical analyser in C++
  20. Regular expression to match standard 10 digit phone number
  21. Regular Expression.how to add optional character at end of regex
  22. Regular Expression with wildcards to match any character
  23. What is a non-capturing group in regular expressions?
  24. Split string on whitespace in Python
  25. How to validate an email address in PHP
  26. What is a non-capturing group in regular expressions?
  27. How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
  28. Python string.replace regular expression
  29. How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
  30. Python string.replace regular expression
  31. Symbol for any number of any characters in regex?
  32. How to replace ” \ ” with ” \\ ” in java
  33. A regular expression to exclude a word/string
  34. Regex how to match an optional character
  35. How to validate an email address in JavaScript
  36. Regular expression to match a word or its prefix
  37. How can I remove punctuation from input text in Java?
  38. Regular expression for exact match of a string
  39. Using the star sign in grep
  40. Regex optional group
  41. Regex for string contains?
  42. Question marks in regular expressions
  43. Difference between \w and \b regular expression meta characters
  44. Regular Expression – Validate Gmail addresses
  45. Java; String replace (using regular expressions)?
  46. How can I output only captured groups with sed?
  47. How to negate specific word in regex?
  48. What is the grep equivalent in Python?
  49. javascript HTML from document.body.innerHTML
  50. Which regular expression operator means ‘Don’t’ match this character?
  51. Python re.split() vs split()
  52. How can I write a regex which matches non greedy?
  53. Negative matching using grep (match lines that do not contain foo)
  54. Regex match everything after question mark?
  55. Validating IPv4 addresses with regexp
  56. Can a URL contain a semicolon and still be valid?
  57. How is \\n and \\\n interpreted by the expanded regular expression?
  58. Regex to match only uppercase “words” with some exceptions
  59. Regular Expression to reformat a US phone number in Javascript
  60. Regex to match only letters
  61. Regex optional capturing group?
  62. Finding the complement of a DFA?
  63. RegEx to find two or more consecutive chars
  64. RE error: illegal byte sequence on Mac OS X
  65. Regex to match an optional ‘+’ symbol followed by any number of digits
  66. Regex Match all characters between two strings
  67. Regular expression to match a word or its prefix
  68. Regular expressions in C: examples?
  69. How to ignore whitespace in a regular expression subject string?
  70. Regular expression for a string that does not start with a sequence
  71. Regex credit card number tests
  72. python regular expression “\1”
  73. Regular expression to stop at first match
  74. Find the location of a character in string
  75. /bb|[^b]{2}/ how does it work?
  76. How do I match any character across multiple lines in a regular expression?
  77. Regular expression to remove HTML tags from a string
  78. Regular Expressions- Match Anything
  79. My Vim replace with a regex is throwing a `E488: Trailing characters`
  80. Regex for “AND NOT” operation
  81. Regular expression that matches valid IPv6 addresses
  82. Escaping Parentheses in Regex
  83. What is the best regular expression to check if a string is a valid URL?
  84. Regex to validate date formats dd/mm/YYYY, dd-mm-YYYY, dd.mm.YYYY, dd mmm YYYY, dd-mmm-YYYY, dd/mmm/YYYY, dd.mmm.YYYY with Leap Year Support
  85. Regex difference: (\w+)? and (\w*)
  86. Wrap element with in any number of elements with PHP
  87. extract shortcodes from string
  88. preg_replace and comment_form_defaults
  89. 404 regular-expression advice needed
  90. How to use a variable as a className inside preg_match_all parameters?
  91. How to set up redirects for category paginated pages after adding /category/ to permalink
  92. Adding span tags to post titles using regex
  93. Redirect non www to www using redirection plugin regex
  94. Restrict comments with regular expression
  95. Remove Custom HTML Posts Using Regex
  96. Regexes allow only [a-z][A-Z][0-9] and –
  97. Call Shortcode Attribute Value within another function
  98. How to fix old embeded iframes with WP-CLI search-replace
  99. Regex For Extracting First 4 letters of search term
  100. Use Regex Redirection via htsaccess for RSS Feeds WordPress

Leave a Comment

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)