权限没有,则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>javascript - Creating a simple hashtag formatter in React Native - Stack Overflow
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javascript - Creating a simple hashtag formatter in React Native - Stack Overflow

programmeradmin9浏览0评论

Is it possible, without using external libraries, to parse a string with hashtag then style it with the Text ponent?


const string = "Let's #Tweet on #Twitter";

// Expect:
// Let's <Text style={{ color: 'blue' }}>#Tweet</Text> on <Text style={{ color: 'blue' }}>#Twitter</Text>

I thought this would do:

import React from 'react';
import { Text } from 'react-native';

export const HASHTAG_FORMATTER = string => {
  return string.replace(/(^|\s)(#[a-z\d-]+)/ig, `$1${<Text style={{ color: 'blue' }}>$2</Text>}`);
}

Usage:

import React from 'react';
import { View, Text } from 'react-native';
import { HASHTAG_FORMATTER } from '../../utilities/hashtag';

const Home = props => {
  return (
    <View>
      <Text>{HASHTAG_FORMATTER("Let's #Tweet on #Twitter")}</Text>
    <View>
  )
}

What I got instead was:

Let's [object Object] on [object Object]

See example:

Is there a way to achieve this in jsx? Thanks.

Is it possible, without using external libraries, to parse a string with hashtag then style it with the Text ponent?


const string = "Let's #Tweet on #Twitter";

// Expect:
// Let's <Text style={{ color: 'blue' }}>#Tweet</Text> on <Text style={{ color: 'blue' }}>#Twitter</Text>

I thought this would do:

import React from 'react';
import { Text } from 'react-native';

export const HASHTAG_FORMATTER = string => {
  return string.replace(/(^|\s)(#[a-z\d-]+)/ig, `$1${<Text style={{ color: 'blue' }}>$2</Text>}`);
}

Usage:

import React from 'react';
import { View, Text } from 'react-native';
import { HASHTAG_FORMATTER } from '../../utilities/hashtag';

const Home = props => {
  return (
    <View>
      <Text>{HASHTAG_FORMATTER("Let's #Tweet on #Twitter")}</Text>
    <View>
  )
}

What I got instead was:

Let's [object Object] on [object Object]

See example: https://codesandbox.io/s/react-native-69dwm?fontsize=14

Is there a way to achieve this in jsx? Thanks.

Share Improve this question edited Oct 15, 2019 at 5:00 Sylar asked Oct 15, 2019 at 4:35 SylarSylar 12.1k27 gold badges104 silver badges180 bronze badges
Add a ment  | 

2 Answers 2

Reset to default 10

You can't use back references like this, you can use callback function of replace when you want to have a dynamic evaluation

const HASHTAG_FORMATTER = string => {
  return string.replace(/(^|\s)(#[a-z\d-]+)/ig, (m, g1, g2) => {
    return g1 + "<span style={color:'green'}>" + g2 + "< /span>"
  });
}


console.log(HASHTAG_FORMATTER("#tweet"))

To solve your specific problem you need to solve it by splitting string and then building Text ponents as per the values

Demo

const HASHTAG_FORMATTER = string => {
  return string.split(/((?:^|\s)(?:#[a-z\d-]+))/gi).filter(Boolean).map((v,i)=>{
    if(v.includes('#')){
      return <Text key={i} style={{color:'green'}}>{v}</Text>
    }   else{
      return <Text key={i}>{v}</Text>
    }
  })
};

Now you can handle @Mention and #hashtag handle Code snippet

import React from "react";
import { StyleSheet, Text, View } from "react-native";

const HASHTAG_FORMATTER = string => {
  return string.split(/((?:^|\s)(?:#[a-z\d-] || @[a-z\d-]+))/gi).filter(Boolean).map((v,i)=>{
    if(v.includes('#') || v.includes('@')){
      return <Text key={i} onPress={()=>{alert(v)}} style={{color:'green'}}>{v}</Text>
    }  else{
      return <Text key={i}>{v}</Text>
    }
  })
};

const App =()=> {
    return (
      <View style={styles.app}>
        <Text>{HASHTAG_FORMATTER("Let's #Tweet on #Twitter by @pakistan")}</Text>
      </View>
    );
}

const styles = StyleSheet.create({
  app: {
    marginTop: 100,
    maxWidth: 500
  }
});

export default App;
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