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Notes et mémos techniques

les fonctions string en javascript

Voici un classement par type de retours des fonctions applicables aux chaines de caractères

Tableau de strings

  • match(): regex Searches a string for a match against a regular expression, and returns the matches
  • split(): Splits a string into an array of substrings

Booléens

  • endsWith(): Checks whether a string ends with specified string/characters
  • includes(): Checks whether a string contains the specified string/characters
  • localeCompare(): Compares two strings in the current locale
  • startsWith(): Checks whether a string begins with specified characters

Caractères

  • substring(): Extracts the characters from a string, between two specified indices
  • substr(): Extracts the characters from a string, beginning at a specified start position, and through the specified number of character
  • fromCharCode(): Converts Unicode values to characters

Position

  • indexOf(): Returns the position of the first found occurrence of a specified value in a string
  • lastIndexOf(): Returns the position of the last found occurrence of a specified value in a string
  • search(): Searches a string for a specified value, or regular expression, and returns the position of the match
  • charCodeAt(): Returns the Unicode of the character at the specified index
  • charAt(): Returns the character at the specified index (position)

Manipulation de chaines de caractère

  • concat(): Joins two or more strings, and returns a new joined strings
  • repeat(): Returns a new string with a specified number of copies of an existing string
  • replace(): Searches a string for a specified value, or a regular expression, and returns a new string where the specified values are replaced
  • slice(): Extracts a part of a string and returns a new string
  • toLocaleLowerCase(): Converts a string to lowercase letters, according to the host's locale
  • toLocaleUpperCase(): Converts a string to uppercase letters, according to the host's locale
  • toLowerCase(): Converts a string to lowercase letters
  • toString(): Returns the value of a String object
  • toUpperCase(): Converts a string to uppercase letters
  • trim(): Removes whitespace from both ends of a string

Casting

valueOf(): Returns the primitive value of a String object

javascript
es6
tutoriel
string
programmation
rédigé le 06/10/16, mis à jour le 11/10/22 par Behrouze
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