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How to break out of Jquery for iteration [closed]
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)
Data science time! April 2019 and salary with experience
The Ask Question Wizard is Live!Is there an “exists” function for jQuery?Add table row in jQueryHow do I check if an element is hidden in jQuery?Setting “checked” for a checkbox with jQuery?How do I redirect to another webpage?How can I know which radio button is selected via jQuery?How to check whether a checkbox is checked in jQuery?How can I refresh a page with jQuery?jQuery scroll to element“Thinking in AngularJS” if I have a jQuery background?
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I have a situation that I am using AJAX to call a page that returns a list of business locations to populate a Google map. My original goal was to display markers for locations whose radius touched the website visitor's location.
Now I only need to know IF the website visitor is within the radius of any one of the locations returned by the ajax call. In the code below, you see a conditional statement "fink <= rs.Records[recno].radius". What I am attempting to do is the first time that statement executes to true, set a cookie and/or call a function and exit the for loop.
As a side question, a friend told me of something called grep (I think). Do I need to loop through an entire list to find if that condition is true? Meaning I know in mySQL I can just query something like "select * from locations where radius < 50". So if my ajax returns 10,000 locations, all I need to know is my website visitor distance within the radius of any any of my locations?
Thanks in advance for any help.
function distance(lat1, lon1, lat2, lon2)
var p = 0.017453292519943295; // Math.PI / 180
var c = Math.cos;
var a = 0.5 - c((lat2 - lat1) * p) / 2 +
c(lat1 * p) * c(lat2 * p) *
(1 - c((lon2 - lon1) * p)) / 2;
return .62137119 * (12742 * Math.asin(Math.sqrt(a))); // 2 * R; R = 6371 km
function getMarkers(lat, lng, city, state)
$.ajax(
url: '/getMarkers.asp?state=Nebraska',
type: 'GET',
dataType: 'text',
error: function(xhr, status, errorstr)
console.log(errorstr); // just show error message in console if there was an error
,
).done(function(response_obj)
console.log(response_obj);
var rs = eval(response_obj);
if (rs) // has a non-null value
var str = rs.RecordCount + " Users:<br/>";
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
initMap();
else
str = "No users found"
);
jquery
edited Mar 8 at 21:57
Barmar
438k36262366
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
closed as unclear what you're asking by Kevin B, Devon_C_Miller, Zoe, webwurst, Dale Burrell Mar 9 at 5:03
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
I have a situation that I am using AJAX to call a page that returns a list of business locations to populate a Google map. My original goal was to display markers for locations whose radius touched the website visitor's location.
Now I only need to know IF the website visitor is within the radius of any one of the locations returned by the ajax call. In the code below, you see a conditional statement "fink <= rs.Records[recno].radius". What I am attempting to do is the first time that statement executes to true, set a cookie and/or call a function and exit the for loop.
As a side question, a friend told me of something called grep (I think). Do I need to loop through an entire list to find if that condition is true? Meaning I know in mySQL I can just query something like "select * from locations where radius < 50". So if my ajax returns 10,000 locations, all I need to know is my website visitor distance within the radius of any any of my locations?
Thanks in advance for any help.
function distance(lat1, lon1, lat2, lon2)
var p = 0.017453292519943295; // Math.PI / 180
var c = Math.cos;
var a = 0.5 - c((lat2 - lat1) * p) / 2 +
c(lat1 * p) * c(lat2 * p) *
(1 - c((lon2 - lon1) * p)) / 2;
return .62137119 * (12742 * Math.asin(Math.sqrt(a))); // 2 * R; R = 6371 km
function getMarkers(lat, lng, city, state)
$.ajax(
url: '/getMarkers.asp?state=Nebraska',
type: 'GET',
dataType: 'text',
error: function(xhr, status, errorstr)
console.log(errorstr); // just show error message in console if there was an error
,
).done(function(response_obj)
console.log(response_obj);
var rs = eval(response_obj);
if (rs) // has a non-null value
var str = rs.RecordCount + " Users:<br/>";
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
initMap();
else
str = "No users found"
);
jquery
edited Mar 8 at 21:57
Barmar
438k36262366
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
closed as unclear what you're asking by Kevin B, Devon_C_Miller, Zoe, webwurst, Dale Burrell Mar 9 at 5:03
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
breakwill break out of a loop.
– Barmar
Mar 8 at 21:58
"set a cookie and/or call a function and exit the for loop." i see where you called .append, but, i don't see where you tried setting a cookie and/or exiting the loop.
– Kevin B
Mar 8 at 21:59
BTW, don't useeval(response_obj), useJSON.parse(response_obj).
– Barmar
Mar 8 at 22:03
add a comment |
I have a situation that I am using AJAX to call a page that returns a list of business locations to populate a Google map. My original goal was to display markers for locations whose radius touched the website visitor's location.
Now I only need to know IF the website visitor is within the radius of any one of the locations returned by the ajax call. In the code below, you see a conditional statement "fink <= rs.Records[recno].radius". What I am attempting to do is the first time that statement executes to true, set a cookie and/or call a function and exit the for loop.
As a side question, a friend told me of something called grep (I think). Do I need to loop through an entire list to find if that condition is true? Meaning I know in mySQL I can just query something like "select * from locations where radius < 50". So if my ajax returns 10,000 locations, all I need to know is my website visitor distance within the radius of any any of my locations?
Thanks in advance for any help.
function distance(lat1, lon1, lat2, lon2)
var p = 0.017453292519943295; // Math.PI / 180
var c = Math.cos;
var a = 0.5 - c((lat2 - lat1) * p) / 2 +
c(lat1 * p) * c(lat2 * p) *
(1 - c((lon2 - lon1) * p)) / 2;
return .62137119 * (12742 * Math.asin(Math.sqrt(a))); // 2 * R; R = 6371 km
function getMarkers(lat, lng, city, state)
$.ajax(
url: '/getMarkers.asp?state=Nebraska',
type: 'GET',
dataType: 'text',
error: function(xhr, status, errorstr)
console.log(errorstr); // just show error message in console if there was an error
,
).done(function(response_obj)
console.log(response_obj);
var rs = eval(response_obj);
if (rs) // has a non-null value
var str = rs.RecordCount + " Users:<br/>";
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
initMap();
else
str = "No users found"
);
jquery
edited Mar 8 at 21:57
Barmar
438k36262366
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
I have a situation that I am using AJAX to call a page that returns a list of business locations to populate a Google map. My original goal was to display markers for locations whose radius touched the website visitor's location.
Now I only need to know IF the website visitor is within the radius of any one of the locations returned by the ajax call. In the code below, you see a conditional statement "fink <= rs.Records[recno].radius". What I am attempting to do is the first time that statement executes to true, set a cookie and/or call a function and exit the for loop.
As a side question, a friend told me of something called grep (I think). Do I need to loop through an entire list to find if that condition is true? Meaning I know in mySQL I can just query something like "select * from locations where radius < 50". So if my ajax returns 10,000 locations, all I need to know is my website visitor distance within the radius of any any of my locations?
Thanks in advance for any help.
function distance(lat1, lon1, lat2, lon2)
var p = 0.017453292519943295; // Math.PI / 180
var c = Math.cos;
var a = 0.5 - c((lat2 - lat1) * p) / 2 +
c(lat1 * p) * c(lat2 * p) *
(1 - c((lon2 - lon1) * p)) / 2;
return .62137119 * (12742 * Math.asin(Math.sqrt(a))); // 2 * R; R = 6371 km
function getMarkers(lat, lng, city, state)
$.ajax(
url: '/getMarkers.asp?state=Nebraska',
type: 'GET',
dataType: 'text',
error: function(xhr, status, errorstr)
console.log(errorstr); // just show error message in console if there was an error
,
).done(function(response_obj)
console.log(response_obj);
var rs = eval(response_obj);
if (rs) // has a non-null value
var str = rs.RecordCount + " Users:<br/>";
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
initMap();
else
str = "No users found"
);
jquery
jquery
edited Mar 8 at 21:57
Barmar
438k36262366
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
edited Mar 8 at 21:57
Barmar
438k36262366
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
edited Mar 8 at 21:57
Barmar
438k36262366
edited Mar 8 at 21:57
Barmar
438k36262366
edited Mar 8 at 21:57
Barmar
438k36262366
438k36262366
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
asked Mar 8 at 21:55
TMHDesignTMHDesign
34118
34118
closed as unclear what you're asking by Kevin B, Devon_C_Miller, Zoe, webwurst, Dale Burrell Mar 9 at 5:03
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as unclear what you're asking by Kevin B, Devon_C_Miller, Zoe, webwurst, Dale Burrell Mar 9 at 5:03
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
breakwill break out of a loop.
– Barmar
Mar 8 at 21:58
"set a cookie and/or call a function and exit the for loop." i see where you called .append, but, i don't see where you tried setting a cookie and/or exiting the loop.
– Kevin B
Mar 8 at 21:59
BTW, don't useeval(response_obj), useJSON.parse(response_obj).
– Barmar
Mar 8 at 22:03
add a comment |
breakwill break out of a loop.
– Barmar
Mar 8 at 21:58
"set a cookie and/or call a function and exit the for loop." i see where you called .append, but, i don't see where you tried setting a cookie and/or exiting the loop.
– Kevin B
Mar 8 at 21:59
BTW, don't useeval(response_obj), useJSON.parse(response_obj).
– Barmar
Mar 8 at 22:03
break will break out of a loop.– Barmar
Mar 8 at 21:58
break will break out of a loop.– Barmar
Mar 8 at 21:58
"set a cookie and/or call a function and exit the for loop." i see where you called .append, but, i don't see where you tried setting a cookie and/or exiting the loop.
– Kevin B
Mar 8 at 21:59
"set a cookie and/or call a function and exit the for loop." i see where you called .append, but, i don't see where you tried setting a cookie and/or exiting the loop.
– Kevin B
Mar 8 at 21:59
BTW, don't use
eval(response_obj), use JSON.parse(response_obj).– Barmar
Mar 8 at 22:03
BTW, don't use
eval(response_obj), use JSON.parse(response_obj).– Barmar
Mar 8 at 22:03
add a comment |
1 Answer
1
active
oldest
votes
Use break;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
break;
And if you want to know if any were found, you can set a variable.
found_close = false;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
found_close = true;
break;
if (!found_close)
// do something
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
You might be able to improve the database query, by calculating the distance there, then usingORDER BY DISTANCE LIMIT 1.
– Barmar
Mar 8 at 22:57
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use break;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
break;
And if you want to know if any were found, you can set a variable.
found_close = false;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
found_close = true;
break;
if (!found_close)
// do something
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
You might be able to improve the database query, by calculating the distance there, then usingORDER BY DISTANCE LIMIT 1.
– Barmar
Mar 8 at 22:57
add a comment |
Use break;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
break;
And if you want to know if any were found, you can set a variable.
found_close = false;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
found_close = true;
break;
if (!found_close)
// do something
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
You might be able to improve the database query, by calculating the distance there, then usingORDER BY DISTANCE LIMIT 1.
– Barmar
Mar 8 at 22:57
add a comment |
Use break;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
break;
And if you want to know if any were found, you can set a variable.
found_close = false;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
found_close = true;
break;
if (!found_close)
// do something
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
Use break;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
break;
And if you want to know if any were found, you can set a variable.
found_close = false;
for (var recno = 0; recno < rs.RecordCount; recno++)
fink = distance(<%= session("uLat") %>, <%= session("uLng") %>, rs.Records[recno].latitude, rs.Records[recno].longitude);
if (fink <= rs.Records[recno].radius)
$(".markers").append("<li data-center='" + rs.Records[recno].latitude + ", " + rs.Records[recno].longitude + "' data-locale='" + recno + "' data-radius='" + rs.Records[recno].radius + "' data-location='" + rs.Records[recno].city + "'>" + rs.Records[recno].street + "</li>n");
found_close = true;
break;
if (!found_close)
// do something
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
answered Mar 8 at 22:05
BarmarBarmar
438k36262366
438k36262366
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
You might be able to improve the database query, by calculating the distance there, then usingORDER BY DISTANCE LIMIT 1.
– Barmar
Mar 8 at 22:57
add a comment |
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
You might be able to improve the database query, by calculating the distance there, then usingORDER BY DISTANCE LIMIT 1.
– Barmar
Mar 8 at 22:57
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
Thanks for taking the time to help me. Seems that given a situation where you might have 10,000 locations, and maybe hitting true on 9,999, there would be a way to get a quicker answer than a loop. Have a great day.
– TMHDesign
Mar 8 at 22:51
You might be able to improve the database query, by calculating the distance there, then using
ORDER BY DISTANCE LIMIT 1.– Barmar
Mar 8 at 22:57
You might be able to improve the database query, by calculating the distance there, then using
ORDER BY DISTANCE LIMIT 1.– Barmar
Mar 8 at 22:57
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breakwill break out of a loop.– Barmar
Mar 8 at 21:58
"set a cookie and/or call a function and exit the for loop." i see where you called .append, but, i don't see where you tried setting a cookie and/or exiting the loop.
– Kevin B
Mar 8 at 21:59
BTW, don't use
eval(response_obj), useJSON.parse(response_obj).– Barmar
Mar 8 at 22:03