从数组中删除指定的值 [英] Remove specified value from array

问题描述

如何从数组中删除具有指定值的项目？


即数组值1,2,2,5,7,12,15,21

从数组中删除2将返回

1,5,7,12,15,21


（12和21）不删除，重复也被删除）


到目前为止，我有（val是值，ar是数组，返回新数组）：


函数removeFromArray（val，ar）{

s = String（ar）

//删除第一项（全局搜索）

reRemove = new RegExp（"，" + val，" g"）

s = s.replace（reRemove，""）

//如果在数组的开头

reRemove = new RegExp（" ^" + val +"，"）

s = s.replace（reRemove，""）

//仅删除项目

reRemove = new RegExp（" ^" + val +" $"）

s = s.replace（reRemove，""）

返回新数组

}


然而这似乎是返回1,5,7 ，12,151（151是

''的结果，2'被从阵列的''，15''部分移除）


我将如何修改它以使其正常工作（可能是一个

正则表达式 - 虽然分解和解释）？


我也想要它也可以用于字符串（可能包含

逗号）


ie


array =" Bloggs ，Jo"，" Doe，John"，" Doe，Jane"

删除Doe，Jane"从数组返回Bloggs，Jo，Doe，John

解决方案

"）

s = s.replace（reRemove，""）

返回新数组

}


然而这似乎是返回1,5,7,12,151（151是

''的结果，2'被从阵列''15，21''部分移除）


如何修改它以使其正常工作（可能是一个

正则表达式 - 分解并解释）？


我也希望它也能用于字符串（可能包含

逗号）


即


array =" Bloggs，Jo"，" Doe，John"，" Doe，Jane"

删除Doe，Jane"从数组返回Bloggs，Jo，Doe，John

Sam Collett写道：

怎么做我从数组中删除了一个具有指定值的项目？

即数组值1,2,2,5,7,12,15,21

从数组中删除2将返回
1,5,7,12,15,21

（12和21不被删除，重复也被删除）

到目前为止我有（val是值，ar是数组，返回新数组）：

函数removeFromArray（val，ar）{
s = String（ar）
//如果不是先删除item（全局搜索）
reRemove = new RegExp（"，" + val，" g"）
s = s.replace（reRemove，""）
//如果在数组开始时删除
reRemove = new RegExp（" ^" + val +"，"）
s = s.replace（reRemove，""）
//仅删除项目
reRemove = new RegExp（" ^" + val +"

"）
s = s.replace（reRemove，""）
返回新数组
}
''的结果，'2'从阵列的''，15''部分被移除）

如何修改它以使其正常工作（可能作为一个正则表达式 - 分解并解释）？

我也希望它能够与之配合使用字符串（可能包含逗号）

即

array =" Bloggs，Jo"，Doe，John"，Doe，Jane" ;
删除Doe，Jane从数组返回Bloggs，Jo，Doe，John

首先你说要从数组中删除值，然后你就不要t使用

a JavaScript Array对象。这对我来说没有多大意义。如果您希望从数组中删除项目，则从数组中删除项目：


< script type =" text / javascript">

var theArray = [1,2,2,5,7,12,15,21];


var theNewArray = removeItems（theArray，2） ;

alert（theNewArray.join（"，"））;


函数removeItems（array，item）{

var i = 0;

while（i< array.length）{

if（array [i] == item）{

array.splice（i，1）;

} else {

i ++;

}

}

返回数组;

}

< / script>


但是，你对我说，我没有像那样的阵列。没问题，请说

你有逗号分隔的字符串中的项目如原始所示：


var theValues =" 1,2,2,5 ，7,12,15,21" ;;

var theArray = theValues.split（/，/）;


为名称执行此操作就像好吧：


var theNewArray =（theNamesArray，Doe，John）;


唯一的问题是转动逗号分隔名单列表

一个数组。 ''Doe，John''，''Smith，Joe''"

..split（/，/）无法变成阵列。有很多解决方案，但最简单的是
将使用另一个分隔符（一个不太可能作为一个人的名字出现的一部分

）在原始字符串中）：


var theNames ="''Doe，John''@＃！''Smith，Joe''@＃！''Jones，Mary'' " ;;

var theNamesArray = theNames.split（/ @＃！/）;


更好的是，将名字和姓氏存储为两个属性一个

对象，然后将该对象存储在数组中。


-

| Grant Wagner< gw ***** @ agricoreunited.com>


*客户端Javascript和Netscape 4 DOM参考可从以下位置获得：

*
http：// devedge .netscape.com / library / ... ce / frames.html


* Internet Explorer DOM参考资料：

*
http://msdn.microsoft.com/研讨会/ a ... ence_entry.asp


* Netscape 6/7 DOM参考资料于：

* http://www.mozilla.org/docs/dom/domref/

*为Netscape 6/7和Mozilla升级JavaScript的提示

* http：//www.m. ozilla.org/docs/web-deve...upgrade_2.html

How do I remove an item with a specified value from an array?

i.e. array values 1,2,2,5,7,12,15,21

remove 2 from array would return
1,5,7,12,15,21

(12 and 21 are NOT removed, duplicates are also removed)

So far I have (val is value, ar is array, returns new array):

function removeFromArray(val, ar){
s = String(ar)
// remove if not first item (global search)
reRemove = new RegExp(","+val,"g")
s = s.replace(reRemove,"")
// remove if at start of array
reRemove = new RegExp("^"+val+",")
s = s.replace(reRemove,"")
// remove if only item
reRemove = new RegExp("^"+val+"$")
s = s.replace(reRemove,"")
return new Array(s)
}

However this seems to return 1,5,7,12,151 (the 151 is a result of the
'',2'' being removed from the ''15,21'' part of the array)

How would I modify this to get it to work properly (maybe as one
regular expression - broken down and explained though)?

Also I want it to work with strings as well (possibly containing
commas)

i.e.

array = "Bloggs, Jo", "Doe, John", "Doe, Jane"
remove "Doe, Jane" from array to return "Bloggs, Jo","Doe, John"

解决方案

")
s = s.replace(reRemove,"")
return new Array(s)
}

However this seems to return 1,5,7,12,151 (the 151 is a result of the
'',2'' being removed from the ''15,21'' part of the array)

How would I modify this to get it to work properly (maybe as one
regular expression - broken down and explained though)?

Also I want it to work with strings as well (possibly containing
commas)

i.e.

array = "Bloggs, Jo", "Doe, John", "Doe, Jane"
remove "Doe, Jane" from array to return "Bloggs, Jo","Doe, John"

Sam Collett wrote:

How do I remove an item with a specified value from an array?

i.e. array values 1,2,2,5,7,12,15,21

remove 2 from array would return
1,5,7,12,15,21

(12 and 21 are NOT removed, duplicates are also removed)

So far I have (val is value, ar is array, returns new array):

function removeFromArray(val, ar){
s = String(ar)
// remove if not first item (global search)
reRemove = new RegExp(","+val,"g")
s = s.replace(reRemove,"")
// remove if at start of array
reRemove = new RegExp("^"+val+",")
s = s.replace(reRemove,"")
// remove if only item
reRemove = new RegExp("^"+val+"

")
s = s.replace(reRemove,"")
return new Array(s)
}

However this seems to return 1,5,7,12,151 (the 151 is a result of the
'',2'' being removed from the ''15,21'' part of the array)

How would I modify this to get it to work properly (maybe as one
regular expression - broken down and explained though)?

Also I want it to work with strings as well (possibly containing
commas)

i.e.

array = "Bloggs, Jo", "Doe, John", "Doe, Jane"
remove "Doe, Jane" from array to return "Bloggs, Jo","Doe, John"

First you say you want to remove values from an array, then you don''t use
a JavaScript Array object at all. That doesn''t make much sense to me. If
you want to remove items from an array, then remove items from an array:

<script type="text/javascript">
var theArray = [ 1,2,2,5,7,12,15,21 ];

var theNewArray = removeItems(theArray, 2);
alert(theNewArray.join(", "));

function removeItems(array, item) {
var i = 0;
while (i < array.length) {
if (array[i] == item) {
array.splice(i, 1);
} else {
i++;
}
}
return array;
}
</script>

But, you say to me, "I don''t have an array like that". No problem, say
you have the items in a comma-delimited string as original shown:

var theValues = "1,2,2,5,7,12,15,21";
var theArray = theValues.split(/,/);

Doing it for names would work just as well:

var theNewArray = (theNamesArray, "Doe, John");

The only problem would be turning your comma-delimited list of names into
an array. "''Doe, John'', ''Smith, Joe''" couldn''t be turned into an array by
..split(/,/). There are a number of solutions to this, however the easiest
would be to use another delimiter (one that is unlikely to appear as part
of a person''s name in the original string):

var theNames = "''Doe, John''@#!''Smith, Joe''@#!''Jones, Mary''";
var theNamesArray = theNames.split(/@#!/);

Better still, store the first and last names as two properties of an
object, then store that object in the array.

--
| Grant Wagner <gw*****@agricoreunited.com>

* Client-side Javascript and Netscape 4 DOM Reference available at:
*
http://devedge.netscape.com/library/...ce/frames.html

* Internet Explorer DOM Reference available at:
*
http://msdn.microsoft.com/workshop/a...ence_entry.asp

* Netscape 6/7 DOM Reference available at:
* http://www.mozilla.org/docs/dom/domref/
* Tips for upgrading JavaScript for Netscape 6/7 and Mozilla
* http://www.mozilla.org/docs/web-deve...upgrade_2.html

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