TypeScript lodash.truncate函数代码示例

// Consistent with .length, lodash truncate function is not
function peertubeTruncate (str: string, maxLength: number) {
  const options = {
    length: maxLength
  }
  const truncatedStr = truncate(str, options)

  // The truncated string is okay, we can return it
  if (truncatedStr.length <= maxLength) return truncatedStr

  // Lodash takes into account all UTF characters, whereas String.prototype.length does not: some characters have a length of 2
  // We always use the .length so we need to truncate more if needed
  options.length -= truncatedStr.length - maxLength
  return truncate(str, options)
}

  app.patch('/system', (req, res) => {
    if(req.body.application) {
      req.body.application.taxRate = +req.body.application.taxRate;
      req.body.application.businessName = _.truncate(req.body.application.businessName, { length: 50, omission: '' });
      req.body.application.locationName = +req.body.application.locationName;
      req.body.application.customBusinessCurrency = _.truncate(req.body.application.customBusinessCurrency, { length: 25, omission: '' });
    }

    if(req.body.printer) {
      req.body.printer.characterWidth = +req.body.printer.characterWidth;
    }

    writeSettings(req.body, () => {
      recordAuditMessage(req, MESSAGE_CATEGORIES.SYSTEM, `System settings were updated.`, { settings: req.body });
      res.json({ flash: 'Settings updated successfully.', data: req.body });
    });
  });

 return function truncate(string:string, maxChars:number = 50, doTruncate:boolean = true):string {
     if (!doTruncate) {
         return string;
     }
     return _.truncate(string, {
         length: maxChars,
         separator: /,? +/,
         omission: `…`
     });
 }

  changeMOTD(player, motd: string) {
    const guild: Guild = player.guild;
    if(!guild.isMod(player)) return 'You do not have enough privileges to do this!';

    motd = motd.trim();
    if(!motd) return 'Please be nice, give them a message to look at.';
    if(motd.length > 500) motd = _.truncate(motd, { length: 500 });

    guild.changeMOTD(motd);
  }

export const recordErrorMessage = (req, module, message, stack, foundAt = 'Server') => {

  message = _.truncate(message, { length: 500, omission: '' });

  const insertRecord: any = { module, message, stack, foundAt };
  insertRecord.locationId = +req.header('X-Location');
  insertRecord.terminalId = req.header('X-Terminal');

  if(_.isNaN(insertRecord.locationId)) {
    return;
  }

  ErrorMessage
    .forge(insertRecord)
    .save();
};

function normalizeActor (actor: any) {
  if (!actor || !actor.url) return

  if (typeof actor.url !== 'string') {
    actor.url = actor.url.href || actor.url.url
  }

  if (actor.summary && typeof actor.summary === 'string') {
    actor.summary = truncate(actor.summary, { length: CONSTRAINTS_FIELDS.USERS.DESCRIPTION.max })

    if (actor.summary.length < CONSTRAINTS_FIELDS.USERS.DESCRIPTION.min) {
      actor.summary = null
    }
  }

  return
}

export const formatColumnValue = (
  column: string,
  value: string,
  charLimit: number
): string => {
  switch (column) {
    case 'timestamp':
      return moment(+value / 1000000).format(DEFAULT_TIME_FORMAT)
    case 'procid':
    case 'host':
    case 'appname':
      return truncateText(value, column)
    case 'message':
      value = (value || 'No Message Provided').replace('\\n', '')
      if (value.indexOf(' ') > charLimit - 5) {
        value = _.truncate(value, {length: charLimit - 5})
      }
      return value
  }
  return value
}

export const evaluateExpression = (context: object, value: string): IExpressionChange => {
  if (!value) {
    return { value, spelError: null, spelPreview: '' };
  }

  const stringify = (obj: any): string => {
    return obj === null ? 'null' : obj === undefined ? 'undefined' : JSON.stringify(obj, null, 2);
  };

  try {
    const exprs = parseSpelExpressions(value);
    const results = exprs.map(expr => expr.eval(context));
    return { value, spelError: null, spelPreview: results.join('') };
  } catch (err) {
    const spelError: ISpelError = {
      message: null,
      context: null,
      contextTruncated: null,
    };

    if (err.name && err.message) {
      if (err.name === 'NullPointerException' && err.state && err.state.activeContext) {
        spelError.context = stringify(err.state.activeContext.peek());
        spelError.contextTruncated = truncate(spelError.context, { length: 200 });
      }
      spelError.message = `${err.name}: ${err.message}`;
    } else {
      try {
        spelError.message = JSON.stringify(err);
      } catch (ignored) {
        spelError.message = err.toString();
      }
    }

    return { value, spelError, spelPreview: null };
  }
};

 saveProject(formValue) {
   this.projectData.update({ visibility: formValue.visibility });
   this.projectData.update({ name: truncate(formValue.name, { length: 20 }) });
 }

 const cleanName = (printName, length = 22) => {
   return _.truncate(printName, { length, omission: '' });
 };