How to skip to next iteration in jQuery each util

Question

I m trying to iterate through an array of elements  jQuery s documentation says   jquery Each   documentation     Returning non-false is the same as a continue statement in a for loop  it will skip immediately to the next iteration    I ve tried calling  return non-false   and  non-false    sans return  neither of which skip to the next iteration  Instead  they break the loop  What am i missing

User · Answer

jQuery noop   can help      row   each  function         if  skipIteration              noop             else doSomething

User · Answer

What they mean by non-false is   return true    So this code    x000D   x000D  var arr     one    two    three    four    five    x000D    each arr  function i    x000D    if  arr i      three     x000D      return true  x000D      x000D    console log arr i    x000D      x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 3 3 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D    will log one  two  four  five

User · Answer

By  return non-false   they mean to return any value which would not work out to boolean false   So you could return true  1   non-false   or whatever else you can think up

User · Answer

Javascript sort of has the idea of  truthiness  and  falsiness   If a variable has a value then  generally 9as you will see  it has  truthiness  - null  or no value tends to  falsiness   The snippets below might help   var temp1   if   temp1          false  var temp2   true  if   temp2          true  var temp3       if   temp3          false  var temp4    hello world   if   temp4          true   Hopefully that helps   Also  its worth checking out these videos from Douglas Crockford  update  thanks  cphpython for spotting the broken links - I ve updated to point at working versions now  The Javascript language  Javascript - The Good Parts

User · Answer

The loop only breaks if you return literally false  Ex      this is how jquery calls your function    notice hard comparison       against false if   callback call  obj  i    i  obj  i         false        break      This means you can return anything else  including undefined  which is what you return if you return nothing  so you can simply use an empty return statement     each collection  function  index  item       if   someTestCondition        return     go to next iteration        otherwise do something       It s possible this might vary by version  this is applicable for jquery 1 12 4  But really  when you exit out the bottom of the function  you are also returning nothing  and that s why the loop continues  so I would expect that there is no possibility whatsoever that returning nothing could not continue the loop  Unless they want to force everyone to start returning something to keep the loop going  returning nothing has to be a way to keep it going

User · Answer

Javascript sort of has the idea of  truthiness  and  falsiness   If a variable has a value then  generally 9as you will see  it has  truthiness  - null  or no value tends to  falsiness   The snippets below might help   var temp1   if   temp1          false  var temp2   true  if   temp2          true  var temp3       if   temp3          false  var temp4    hello world   if   temp4          true   Hopefully that helps   Also  its worth checking out these videos from Douglas Crockford  update  thanks  cphpython for spotting the broken links - I ve updated to point at working versions now  The Javascript language  Javascript - The Good Parts

User · Answer

The loop only breaks if you return literally false  Ex      this is how jquery calls your function    notice hard comparison       against false if   callback call  obj  i    i  obj  i         false        break      This means you can return anything else  including undefined  which is what you return if you return nothing  so you can simply use an empty return statement     each collection  function  index  item       if   someTestCondition        return     go to next iteration        otherwise do something       It s possible this might vary by version  this is applicable for jquery 1 12 4  But really  when you exit out the bottom of the function  you are also returning nothing  and that s why the loop continues  so I would expect that there is no possibility whatsoever that returning nothing could not continue the loop  Unless they want to force everyone to start returning something to keep the loop going  returning nothing has to be a way to keep it going

User · Answer

By  return non-false   they mean to return any value which would not work out to boolean false   So you could return true  1   non-false   or whatever else you can think up

User · Answer

What they mean by non-false is   return true    So this code    x000D   x000D  var arr     one    two    three    four    five    x000D    each arr  function i    x000D    if  arr i      three     x000D      return true  x000D      x000D    console log arr i    x000D      x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 3 3 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D    will log one  two  four  five

User · Answer

By  return non-false   they mean to return any value which would not work out to boolean false   So you could return true  1   non-false   or whatever else you can think up

User · Answer

Dont forget that you can sometimes just fall off the end of the block to get to the next iteration       row   each  function         if     leaveTheLoop                 do stuff here                 Rather than actually returning like this       row   each  function         if   leaveTheLoop            return    go to next iteration in  each           do stuff here

User · Answer

What they mean by non-false is   return true    So this code    x000D   x000D  var arr     one    two    three    four    five    x000D    each arr  function i    x000D    if  arr i      three     x000D      return true  x000D      x000D    console log arr i    x000D      x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 3 3 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D    will log one  two  four  five

User · Answer

Javascript sort of has the idea of  truthiness  and  falsiness   If a variable has a value then  generally 9as you will see  it has  truthiness  - null  or no value tends to  falsiness   The snippets below might help   var temp1   if   temp1          false  var temp2   true  if   temp2          true  var temp3       if   temp3          false  var temp4    hello world   if   temp4          true   Hopefully that helps   Also  its worth checking out these videos from Douglas Crockford  update  thanks  cphpython for spotting the broken links - I ve updated to point at working versions now  The Javascript language  Javascript - The Good Parts

User · Answer

What they mean by non-false is   return true    So this code    x000D   x000D  var arr     one    two    three    four    five    x000D    each arr  function i    x000D    if  arr i      three     x000D      return true  x000D      x000D    console log arr i    x000D      x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 3 3 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D    will log one  two  four  five

User · Answer

jQuery noop   can help      row   each  function         if  skipIteration              noop             else doSomething

User · Answer

Dont forget that you can sometimes just fall off the end of the block to get to the next iteration       row   each  function         if     leaveTheLoop                 do stuff here                 Rather than actually returning like this       row   each  function         if   leaveTheLoop            return    go to next iteration in  each           do stuff here

User · Answer

By  return non-false   they mean to return any value which would not work out to boolean false   So you could return true  1   non-false   or whatever else you can think up

User · Answer

Javascript sort of has the idea of  truthiness  and  falsiness   If a variable has a value then  generally 9as you will see  it has  truthiness  - null  or no value tends to  falsiness   The snippets below might help   var temp1   if   temp1          false  var temp2   true  if   temp2          true  var temp3       if   temp3          false  var temp4    hello world   if   temp4          true   Hopefully that helps   Also  its worth checking out these videos from Douglas Crockford  update  thanks  cphpython for spotting the broken links - I ve updated to point at working versions now  The Javascript language  Javascript - The Good Parts

[javascript] How to skip to next iteration in jQuery.each() util?

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