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v4.5
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    v4.5

      substring()

      Vue d’ensemble

      La fonction substring() renvoie une sous-chaîne extraite de la chaîne donnée, avec l'indice de départ spécifié (basé sur zéro) et se poursuivant pendant le nombre spécifié de caractères.

      Syntaxe

      substring(str, start, length)

      Argument Type
      Description
      str String La chaîne dont extraire la sous-chaîne
      start Integer ≥ 0 L'indice où commence la sous-chaîne
      length Integer > 0 Le nombre de caractères dans la sous-chaîne

      Type de retour : String

      Exemple de Résultat

      return substring("a database", 2, 4)
      

      Résultat : data

      Exemple d'Utilisation

      Extrait les 150 premiers caractères du contenu de l'article comme aperçu.

      find().nodes({@post.title == "High Density Parallel Computing"}) as post
      return substring(post.content, 0, 150)
      
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