I get this error and I don't know why. I basically just check the operator and make calculations based on that.
Thank you for your help.
Function:
void calculate() {
setState(() {
int num1int = int.tryParse(_num1);
int num2int = int.tryParse(_num2);
int result = 0;
if (_operator == "+") {
result = num1int + num2int;
}
else if (_operator == "-") {
result = num1int - num2int;
}
else if (_operator == "*") {
result = num1int * num2int;
}
else if (_operator == "/") {
result = num1int ~/ num2int;
}
});
}
if "int.tryParse" can not convert it into integer, it will be returning "null". So your code does: null + null. You can add a check for num1int and num2int if it is null before calcultion.
please change your code to
if (_operator == "+") {
result = num1int??0 + num2int??0;
}
else if (_operator == "-") {
result = num1int??0 - num2int??0;
}
else if (_operator == "*") {
result = num1int??1 * num2int??1;
}
else if (_operator == "/") {
result = num1int??1 ~/ num2int??1;
}
Related
This Is my coding for mapping data and filter it by subs class:
Hi i have a problem where is my list is null after it mapping the data so can you help me for this solution
void onUserJobListData(Event e) {
Map data = Map.from(e.snapshot.value);
data?.forEach((a, b) {
print("key " + a);
// int i = _jobs.indexWhere((j) => j.jobId == a);
int i = _jobs == null ? 0 : _jobs.indexWhere((j) => j.jobId == a);
if (i >= 0) {
if (b['notification_date'] != null) {
_jobs[i].matchDetail.notificationDate = b['notification_date'];
}
if (b['status_date'] != null) {
_jobs[i].matchDetail.statusDate = b['status_date'];
}
if (b['event_status'] != null) {
_jobs[i].matchDetail.eventStatus = b['event_status'];
}
if (b['notification_status'] != null) {
_jobs[i].matchDetail.notificationStatus = b['notification_status'];
}
if (b['status'] != null) {
_jobs[i].matchDetail.status = b['status'];
}
}
});
print("Apa apa jerr");
jobState.setJobList(_jobs, JobState.USER_JOB);
}`
Here after the result is loaded and try to input the next input it just get appended with the result, but the display should be cleared for the second calculation. Any help will be appreciated.
var arr=[];
var input=0;
function numberBtn(arg){
if ( document.getElementById("currentValue").innerHTML ==="ERROR" || (document.getElementById("currentValue").innerHTML == "0"))
{
document.getElementById("currentValue").innerHTML = "";
}
input += arg;
document.getElementById("currentValue").innerHTML += arg;
}
function calculate(val){
if(input !== 0){
addToArr(input);
}
var answer = val[0];
var divideZero =0;
var i=2
switch(arr[i-1]){
case '+':
answer= Number(val[i-2]) + Number(val[i]);
break;
case '-':
answer-= val[i];
break;
case '/':
if (val[i] == 0) divideZero = 1;
else answer = answer / val[i];
break;
case'*':
//console.log(value,'before multiply');
answer = answer * val[i];
// console.log(val[i],'after multiply');
break;
case'%':
if (val[i] == 0) divideZero = 1;
else{
var q= val[i-2]/val[i];
answer= val[i-2] - (val[i] * Math.floor(q));
}
break;
case'+/-':
answer= -answer;
break;
}
if ( divideZero === 1) {
clearAll();
document.getElementById("currentValue").innerHTML = "ERROR";
}
else
{
document.getElementById("currentValue").innerHTML = answer;
input = answer;
arr = [];
}
}
function addToArr(input){
arr.push(input);
}
function clearAll() {
arr = [];
input = 0;
document.getElementById("currentValue").innerHTML = "0";
}
function operatorBtn(arg){
if (input !== 0) {
addToArr(input);
addToArr(arg);
document.getElementById("currentValue").innerHTML +=arg;
input = 0;
}
}
I just finished creating a program (I am a beginner at this programming stuff) Now I might be doing this the total wrong way or my logic might not be the greatest at programming but any help would be amazing I will post my code so far below
This code is used when a button is clicked, the button will send a text then the textbox will get the text.
if (txt1.Text == "")
{
txt1.Text = "J";
btn1.Visible = false;
}
else if (txt1.Text != "")
{
if (txt2.Text == "")
{
txt2.Text = "J";
btn1.Visible = false;
}
else if (txt2.Text != "")
{
if (txt3.Text == "")
{
txt3.Text = "J";
btn1.Visible = false;
}
else if (txt3.Text != "")
{
if (txt4.Text == "")
{
txt4.Text = "J";
btn1.Visible = false;
}
else if (txt4.Text != "")
{
if (txt5.Text == "")
{
txt5.Text = "J";
btn1.Visible = false;
}
else if (txt5.Text != "")
{
if (txt6.Text == "")
{
txt6.Text = "J";
btn1.Visible = false;
}
else if (txt6.Text != "")
{
if (txt7.Text == "")
{
txt7.Text = "J";
btn1.Visible = false;
}
else if (txt7.Text != "")
{
if (txt8.Text == "")
{
txt8.Text = "J";
btn1.Visible = false;
}
else if (txt8.Text != "")
{
}
}
}
}
}
}
}
}
You need to get all of these text cases into an array for the following loop to work (I have called the array 'txt' here). Based on what you have written this loop should do the same thing as your code but I'm not sure if that's what you really want to do. Your code is setting a single text box to "J" and then hiding your button only if every preceding text field is not an empty string (This will include any of the fields set to null, for example). The conditional then exits.
`for (int i = 0; i < txt.Length; i++) {
if(txt[i] != "") {
continue;
}
else if(txt[i] == "") {
txt[i] = "J";
btn1.Visible = false;
break;
}
}
Note: I don't know whether this works for C# 3 or not (it should). Try it.
First, you should put all of your text fields into an array:
TextField[] textFields = { txt1, txt2, txt3, txt4, txt5, txt6, txt7, txt8, };
Then, loop through the text fields to find a text field that has no text in it:
foreach (TextField tf in textFields) {
if (tf.Text == "") {
}
}
After we find it, we want to set its text to "J" and make btn1 invisible. Since we already found the text field, we don't need to continue the loop anymore, so we break:
tf.Text = "J";
btn1.Visible = false;
break;
If this doesn't work in C# 3, just update to C# 5 or 6 alright?
Kindly see below code I am using to convert Mirth xml to JSON.
function E4XtoJSON(xml, ignored) {
var r, children = xml.*, attributes = xml.#*, length = children.length();
if(length == 0) {
r = xml.toString();
} else if(length == 1) {
var text = xml.text().toString();
if(text) {
r = text;
}
}
if(r == undefined) {
r = {};
for each (var child in children) {
var name = child.localName();
var json = E4XtoJSON(child, ignored);
var value = r[name];
if(value) {
if(value.length) {
value.push(json);
} else {
r[name] = [value, json]
}
} else {
r[name] = json;
}
}
}
if(attributes.length()) {
var a = {}, c = 0;
for each (var attribute in attributes) {
var name = attribute.localName();
if(ignored && ignored.indexOf(name) == -1) {
a["_" + name] = attribute.toString();
c ++;
}
}
if(c) {
if(r) a._ = r;
return a;
}
}
return r;
}
My concern is
<AdditionalMessageInformationCount AdditionalMessageInformationCount="02"><AdditionalMessageInformationQualifier>01</AdditionalMessageInformationQualifier><AdditionalMessageInformation>MEMBER MUST USE MAIL ORDER.</AdditionalMessageInformation><AdditionalMessageInformationQualifier>02</AdditionalMessageInformationQualifier><AdditionalMessageInformation>PLAN LIMITATIONS EXCEEDED</AdditionalMessageInformation></AdditionalMessageInformationCount>
Here AdditionalMessageInformation elemt is used two times so function fails to create JSON.
Kindly help if anyone have converted XML in json usingg javascript code not any API
We've had success with this version:
function E4XtoJSON(xml, ignored){
var r, children = xml.*,
attributes = xml.# * ,
length = children.length();
if (length == 0)
{
r = xml.toString();
}
else if (length == 1)
{
var text = xml.text().toString();
if (text)
{
r = text;
}
}
if (r == undefined)
{
r = {};
for each(var child in children)
{
var name = child.localName();
var json = E4XtoJSON(child, ignored);
var value = r[name];
if (value)
{
if (value instanceof Array)
{
value.push(json);
}
else
{
r[name] = [value, json]
}
}
else
{
r[name] = json;
}
}
}
if (attributes.length())
{
var a = {},
c = 0;
for each(var attribute in attributes)
{
var name = attribute.localName();
if (ignored && ignored.indexOf(name) == -1)
{
a["_" + name] = attribute.toString();
c++;
}
}
if (c)
{
if (r) a._ = r;
return a;
}
}
return r;
}
With the release of Mirth Connect version 3.3.0, you can use Mirth Connect to set your channel's interior data type to JSON. This will all be done for you.
I want to rotate the .mov file which is in portrait mode by 90 degrees, for that i used the following code..
It works but, it results in loss of video frames...
My code is,
public void encode(File source, File target, EncodingAttributes attributes,
EncoderProgressListener listener, Integer i) throws IllegalArgumentException,
InputFormatException, EncoderException {
String formatAttribute = attributes.getFormat();
Float offsetAttribute = attributes.getOffset();
Float durationAttribute = attributes.getDuration();
QualityScale qualityScale = attributes.getQualityScale();
AudioAttributes audioAttributes = attributes.getAudioAttributes();
VideoAttributes videoAttributes = attributes.getVideoAttributes();
if (audioAttributes == null && videoAttributes == null) {
throw new IllegalArgumentException(
"Both audio and video attributes are null");
}
target = target.getAbsoluteFile();
target.getParentFile().mkdirs();
FFMPEGExecutor ffmpeg = locator.createExecutor();
if (offsetAttribute != null) {
ffmpeg.addArgument("-ss");
ffmpeg.addArgument(String.valueOf(offsetAttribute.floatValue()));
}
ffmpeg.addArgument("-i");
ffmpeg.addArgument(source.getAbsolutePath());
if (durationAttribute != null) {
ffmpeg.addArgument("-t");
ffmpeg.addArgument(String.valueOf(durationAttribute.floatValue()));
}
if (qualityScale != null) {
ffmpeg.addArgument("-qscale:"+qualityScale.getQualityStreamSpecifier());
ffmpeg.addArgument(String.valueOf(qualityScale.getQualityValue()));
}
if (videoAttributes == null) {
ffmpeg.addArgument("-vn");
} else {
String codec = videoAttributes.getCodec();
if (codec != null) {
ffmpeg.addArgument("-vcodec");
ffmpeg.addArgument(codec);
}
String tag = videoAttributes.getTag();
if (tag != null) {
ffmpeg.addArgument("-vtag");
ffmpeg.addArgument(tag);
}
Integer bitRate = videoAttributes.getBitRate();
if (bitRate != null) {
ffmpeg.addArgument("-b");
ffmpeg.addArgument(String.valueOf(bitRate.intValue()));
}
Integer frameRate = videoAttributes.getFrameRate();
if (frameRate != null) {
ffmpeg.addArgument("-r");
ffmpeg.addArgument(String.valueOf(frameRate.intValue()));
}
VideoSize size = videoAttributes.getSize();
if (size != null) {
ffmpeg.addArgument("-s");
ffmpeg.addArgument(String.valueOf(size.getWidth()) + "x"
+ String.valueOf(size.getHeight()));
}
FilterGraph filterGraph = videoAttributes.getFilterGraph();
if (filterGraph != null) {
ffmpeg.addArgument("-vf");
if(videoAttributes.getRotate() != null && videoAttributes.getRotate() == 90){
ffmpeg.addArgument("transpose=1");
}else if(videoAttributes.getRotate() != null && videoAttributes.getRotate() == 180){
ffmpeg.addArgument("vflip,hflip");
}
else {
if (filterGraph.isUseExpression()) {
ffmpeg.addArgument(filterGraph.getFilterGraphExpression());
}
}
}
}
if (audioAttributes == null) {
ffmpeg.addArgument("-an");
} else {
String codec = audioAttributes.getCodec();
if (codec != null) {
ffmpeg.addArgument("-acodec");
ffmpeg.addArgument(codec);
}
Integer bitRate = audioAttributes.getBitRate();
if (bitRate != null) {
ffmpeg.addArgument("-ab");
ffmpeg.addArgument(String.valueOf(bitRate.intValue()));
}
Integer channels = audioAttributes.getChannels();
if (channels != null) {
ffmpeg.addArgument("-ac");
ffmpeg.addArgument(String.valueOf(channels.intValue()));
}
Integer samplingRate = audioAttributes.getSamplingRate();
if (samplingRate != null) {
ffmpeg.addArgument("-ar");
ffmpeg.addArgument(String.valueOf(samplingRate.intValue()));
}
Integer volume = audioAttributes.getVolume();
if (volume != null) {
ffmpeg.addArgument("-vol");
ffmpeg.addArgument(String.valueOf(volume.intValue()));
}
}
ffmpeg.addArgument("-f");
ffmpeg.addArgument(formatAttribute);
ffmpeg.addArgument("-y");
ffmpeg.addArgument(target.getAbsolutePath());
try {
ffmpeg.execute();
} catch (IOException e) {
throw new EncoderException(e);
}
try {
String lastWarning = null;
long duration;
long progress = 0;
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getErrorStream()));
MultimediaInfo info = parseMultimediaInfo(source, reader);
if (durationAttribute != null) {
duration = (long) Math
.round((durationAttribute.floatValue() * 1000L));
} else {
duration = info.getDuration();
if (offsetAttribute != null) {
duration -= (long) Math
.round((offsetAttribute.floatValue() * 1000L));
}
}
if (listener != null) {
listener.sourceInfo(info);
}
int step = 0;
String line;
while ((line = reader.readLine()) != null) {
System.out.println("line::::"+line);
if (step == 0) {
if (line.startsWith("WARNING: ")) {
if (listener != null) {
listener.message(line);
}
} else if (!line.startsWith("Output #0")) {
//throw new EncoderException(line);
} else {
step++;
}
} else if (step == 1) {
if (!line.startsWith(" ")) {
step++;
} else {
System.out.println("line>>>>>>"+line);
Hashtable table1 = new Hashtable();
Matcher m = ROTATE_INFO_PATTERN.matcher(line);
while (m.find()) {
if (table1 == null) {
table1 = new Hashtable();
}
String key = m.group(1);
String value = m.group(2);
table1.put(key, value);
}
System.out.println("Table values"+table1.get("rotate"));
if(table1.get("rotate") != null){
Object videoRotateValue = table1.get("rotate");
int rotate = Integer.valueOf(videoRotateValue.toString());
switch(rotate){
case 90:
videoAttributes.setRotate(rotate);
if(i == 0){
i++;
encode(source, target, attributes, null, i);
}
break;
case 180:
videoAttributes.setRotate(rotate);
if(i == 0){
i++;
encode(source, target, attributes, null, i);
}
break;
case 270: System.out.println("case 3 :: "+videoRotateValue);
break;
}
}
}
}
if (step == 2) {
if (!line.startsWith("Stream mapping:")) {
throw new EncoderException(line);
} else {
step++;
}
} else if (step == 3) {
if (!line.startsWith(" ")) {
step++;
}
}
if (step == 4) {
line = line.trim();
if (line.length() > 0) {
Hashtable table = parseProgressInfoLine(line);
if (table == null) {
if (listener != null) {
listener.message(line);
}
lastWarning = line;
} else {
if (listener != null) {
String time = (String) table.get("time");
if (time != null) {
int dot = time.indexOf('.');
if (dot > 0 && dot == time.length() - 2
&& duration > 0) {
String p1 = time.substring(0, dot);
String p2 = time.substring(dot + 1);
try {
long i1 = Long.parseLong(p1);
long i2 = Long.parseLong(p2);
progress = (i1 * 1000L)
+ (i2 * 100L);
int perm = (int) Math
.round((double) (progress * 1000L)
/ (double) duration);
if (perm > 1000) {
perm = 1000;
}
listener.progress(perm);
} catch (NumberFormatException e) {
;
}
}
}
}
lastWarning = null;
}
}
}
}
if (lastWarning != null) {
if (!SUCCESS_PATTERN.matcher(lastWarning).matches()) {
throw new EncoderException(lastWarning);
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
ffmpeg.destroy();
}
}
Please advise, how to achieve video rotation without any video Frame loss
Thanks In Advance
Lakshmi Priya . K
Worked for couple of days and finally tried to write the rotated video in different target file then i got the video output without any loss and video is also rotated....
Thanks
Lakshmi Priya. K