Question

我试图计算textarea的每一行中的字符。

我试图调整此代码来计算音节std::find_if但没有成功。任何帮助将不胜感激。

＆＃13;

function $CharCount($input) {
  $("[name=set_" + $input + "]").keyup(function() {

    var arrayOfLines = $("[name=set_" + $input + "]").val().match(/[^\r\n]+/g);
    var tempArr = [];
    var $content;
    var char;
    var $result;

    for (var i = 0; i < arrayOfLines.length; i++) {
      $content = arrayOfLines[i];
      $result = $content.val().length;
      tempArr.push($result);
    }

    $("[name=set_" + $input + "_content]").val(tempArr);

  });
}

(function($) {
  $CharCount("a");
})(jQuery);

＆＃13;

<textarea rows="8" cols="3" class="alignright" name="set_a_syllable_count" readonly="readonly" /></textarea>
<textarea rows="8" cols="30" name="set_a"></textarea>

＆＃13;

Answer 1

[06 Sep 2016 23:13:58] [jmxtrans-result-6] 21573814 WARN (com.googlecode.jmxtrans.jmx.ResultProcessor$1:60) - Could not write results [Result(attributeName=Usage, className=sun.management.MemoryPoolImpl, objDomain=java.lang, typeName=type=MemoryPool,name=Metaspace, values={init=0, committed=20185088, max=-1, used=19304024}, epoch=1473183838891, keyAlias=memorypool), Result(attributeName=Usage, className=sun.management.MemoryPoolImpl, objDomain=java.lang, typeName=type=MemoryPool,name=PS Old Gen, values={init=87031808, committed=87031808, max=1375731712, used=16885688}, epoch=1473183838901, keyAlias=memorypool), Result(attributeName=Usage, className=sun.management.MemoryPoolImpl, objDomain=java.lang, typeName=type=MemoryPool,name=PS Eden Space, values={init=32505856, committed=24117248, max=686817280, used=4032656}, epoch=1473183838903, keyAlias=memorypool), Result(attributeName=Usage, className=sun.management.MemoryPoolImpl, objDomain=java.lang, typeName=type=MemoryPool,name=Compressed Class Space, values={init=0, committed=2359296, max=1073741824, used=2134656}, epoch=1473183838904, keyAlias=memorypool), Result(attributeName=Usage, className=sun.management.MemoryPoolImpl, objDomain=java.lang, typeName=type=MemoryPool,name=Code Cache, values={init=2555904, committed=9633792, max=251658240, used=9103552}, epoch=1473183838905, keyAlias=memorypool), Result(attributeName=Usage, className=sun.management.MemoryPoolImpl, objDomain=java.lang, typeName=type=MemoryPool,name=PS Survivor Space, values={init=5242880, committed=524288, max=524288, used=327680}, epoch=1473183838906, keyAlias=memorypool)] of query Query(objectName=java.lang:type=MemoryPool,name=*, keys=[], attr=[Usage], typeNames=[], resultAlias=memorypool, useObjDomainAsKey=false, allowDottedKeys=false, useAllTypeNames=false, outputWriterInstances=[BaseOutputWriter(typeNames=[], debugEnabled=false, settings={host=10.143.1.43, port=4242}, valueTransformer=com.googlecode.jmxtrans.model.results.IdentityValueTransformer@35a68c72), BaseOutputWriter(typeNames=[], debugEnabled=false, settings={}, valueTransformer=com.googlecode.jmxtrans.model.results.IdentityValueTransformer@3b6164b6)]) to output writer BaseOutputWriter(typeNames=[], debugEnabled=false, settings={host=10.143.1.43, port=4242}, valueTransformer=com.googlecode.jmxtrans.model.results.IdentityValueTransformer@35a68c72) java.lang.NullPointerException at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.processOneMetric(OpenTSDBMessageFormatter.java:196) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.formatResult(OpenTSDBMessageFormatter.java:159) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.access$000(OpenTSDBMessageFormatter.java:54) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter$1.apply(OpenTSDBMessageFormatter.java:170) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter$1.apply(OpenTSDBMessageFormatter.java:166) at com.google.common.collect.Iterators$8.transform(Iterators.java:817) at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) at com.google.common.collect.Iterators$5.hasNext(Iterators.java:569) at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:249) at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:209) at com.google.common.collect.FluentIterable.toList(FluentIterable.java:484) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.formatResults(OpenTSDBMessageFormatter.java:173) at com.googlecode.jmxtrans.model.output.OpenTSDBWriter.internalWrite(OpenTSDBWriter.java:116) at com.googlecode.jmxtrans.model.output.BaseOutputWriter.doWrite(BaseOutputWriter.java:157) at com.googlecode.jmxtrans.jmx.ResultProcessor$1.run(ResultProcessor.java:58) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=SystemLoadAverage, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={SystemLoadAverage=0.09}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=AvailableProcessors, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={AvailableProcessors=4}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=TotalPhysicalMemorySize, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={TotalPhysicalMemorySize=8252579840}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=FreePhysicalMemorySize, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={FreePhysicalMemorySize=170389504}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=TotalSwapSpaceSize, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={TotalSwapSpaceSize=1073737728}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=FreeSwapSpaceSize, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={FreeSwapSpaceSize=1073737728}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=OpenFileDescriptorCount, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={OpenFileDescriptorCount=83}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=MaxFileDescriptorCount, className=sun.management.OperatingSystemImpl, objDomain=java.lang, typeName=type=OperatingSystem, values={MaxFileDescriptorCount=50000}, epoch=1473183838891, keyAlias=null) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=HeapMemoryUsage, className=sun.management.MemoryImpl, objDomain=java.lang, typeName=type=Memory, values={init=130023424, committed=111673344, max=1834483712, used=21039656}, epoch=1473183838891, keyAlias=heap) INFO | jvm 1 | 2016/09/06 23:13:58 | Result(attributeName=NonHeapMemoryUsage, className=sun.management.MemoryImpl, objDomain=java.lang, typeName=type=Memory, values={init=2555904, committed=32178176, max=-1, used=30542232}, epoch=1473183838891, keyAlias=heap) My Config.Json looks like the below:- { "servers": [ { "numQueryThreads": "2", "host": "xx.xx.xx.xx", "port": "1099", "queries": [ { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "obj": "java.lang:type=OperatingSystem", "attr": [ "SystemLoadAverage", "AvailableProcessors", "TotalPhysicalMemorySize", "FreePhysicalMemorySize", "TotalSwapSpaceSize", "FreeSwapSpaceSize", "OpenFileDescriptorCount", "MaxFileDescriptorCount" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "heap", "obj": "java.lang:type=Memory", "attr": [ "HeapMemoryUsage", "NonHeapMemoryUsage" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "cmsoldgen", "obj": "java.lang:name=CMS Old Gen,type=MemoryPool", "attr": [ "Usage" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "gc", "obj": "java.lang:type=GarbageCollector,name=", "attr": [ "CollectionCount", "CollectionTime" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter", "settings": {} }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "memorypool", "obj": "java.lang:type=MemoryPool,name=", "attr": [ "Usage" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "threads", "obj": "java.lang:type=Threading", "attr": [ "DaemonThreadCount", "PeakThreadCount", "ThreadCount", "TotalStartedThreadCount" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "tomcat8-connectors", "obj": "Catalina:type=ThreadPool,name=", "attr": [ "currentThreadCount", "currentThreadsBusy" ] }, { "outputWriters": [ { "@class": "com.googlecode.jmxtrans.model.output.StdOutWriter" }, { "@class": "com.googlecode.jmxtrans.model.output.OpenTSDBWriter", "settings": { "host": "xx.xx.xx.xx", "port": "4242" } } ], "resultAlias": "tomcat8-requests", "obj": "Catalina:type=GlobalRequestProcessor,name=", "attr": [ "bytesReceived", "bytesSent", "errorCount", "processingTime", "requestCount" ] } ] } ] }导致此行出错：

.val()

正确删除它会计算行长度（至少在计算区域中）。

至于计数器textarea错误，你刚刚得到jQuery选择器错误。将您的元素$result = $content.val().length;重命名为set_a_syllable_count。

还有一个问题 - 当textarea为空时，它会抛出错误，因为您正在检查空的正则表达式结果（set_a_content，确切地说）。当没有匹配的行时，你只需要防止计数代码执行：

null

固定代码：

if (arrayOfLines !== null) { ... counting code ... }

function $CharCount($input) {
  $("[name=set_" + $input + "]").keyup(function() {

    var arrayOfLines = $("[name=set_" + $input + "]").val().match(/[^\r\n]+/g);
    var tempArr = [];
    var $content;
    var char;
    var $result;

    if (arrayOfLines !== null) {
      for (var i = 0; i < arrayOfLines.length; i++) {
        $content = arrayOfLines[i];
        $result = $content.length;
        tempArr.push($result);
      }
    }

    $("[name=set_" + $input + "_content]").val(tempArr);

  });
}

(function($) {
  $CharCount("a");
})(jQuery);

Answer 2

我的建议是：

＆＃13;

function $count_how_many_syllables($input) {
  $("[name=set_" + $input + "]").keyup(function (e) {

    var arrayOfLines = $("[name=set_" + $input + "]").val().match(/[^\r\n]+/g);
    var tempArr = [];
    var $charsPerLine;

    for (var i = 0; i < arrayOfLines.length; i++) {
      $charsPerLine = arrayOfLines[i].length;
      tempArr.push($charsPerLine);
    }

    $("[name=set_" + $input + "_syllable_count]").val(tempArr.join('\n'));

  }).trigger('keyup');
}

$(function () {
  $count_how_many_syllables("a");
});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


<textarea rows="8" cols="3" class="alignright" name="set_a_syllable_count" readonly="readonly" /></textarea>
<textarea rows="8" cols="30" name="set_a">i would appreciate
any help
at all</textarea>

＆＃13;

Answer 3

我有点太慢但是这里有一些代码可以用更少的努力实现同样的效果。

        function count() {

            var lines = document
                .getElementById("area")
                .value
                .split("\n");

            var lengths = [];

            for (var i = 0; i < lines.length; i++) {
                var lineLength = lines[i].length;
                document.write(lineLength+ "</br>");
                lengths.push(lineLength);
            }
        }

    <textarea id="area"></textarea>
    <br />
    <button onclick="count();">Count</button>

Answer 4

这是我的解决方案：

Enter

您还可以通过计算避免重复字符，从每个字符串中删除它们：

Enter

完整代码：http://jsfiddle.net/bwnL9Lgg/3/

每行javascript textarea计数字符

4 个答案: