array-map

How to get a clojure array-map to maintain insertion order after assoc?

由 ぐ巨炮叔叔 提交于 2019-12-01 02:00:51
问题 I have an array-map which I am assoc ing some values into it. After a certain size the returned value is a PersistentHashMap rather than the original PersistentArrayMap . I've read about this behavior on a few web sites. Is there any way to force the insertion order even after assoc ? I do have a separate function which will take a ash-map and a vector of keys, and return a "fresh" array-map with keys in this order, but it means that for each assoc, I have to extract the keys first, cons/conj

array_map not working in classes

由 隐身守侯 提交于 2019-11-30 10:53:57
问题 I am trying to create a class to handle arrays but I can't seem to get array_map() to work in it. <?php //Create the test array $array = array(1,2,3,4,5,6,7,8,9,10); //create the test class class test { //variable to save array inside class public $classarray; //function to call array_map function with the given array public function adding($data) { $this->classarray = array_map($this->dash(), $data); } // dash function to add a - to both sides of the number of the input array public function

Can a method be used as an array_map function

由 ぐ巨炮叔叔 提交于 2019-11-30 06:21:04
问题 I want to do something like this: class Cls { function fun($php) { return 'The rain in Spain.'; } } $ar = array(1,2,3); $instance = new Cls(); print_r(array_map('$instance->fun', $ar)); // ^ this won't work but the first argument to array_map is supposed to be the name of the function. I want to avoid writing a wrapper function around $instance->fun, but it doesn't seem like that's possible. Is that true? 回答1: Yes, you can have callbacks to methods, like this: array_map(array($instance, 'fun'

Can a method be used as an array_map function

由 孤街浪徒 提交于 2019-11-28 17:23:21
I want to do something like this: class Cls { function fun($php) { return 'The rain in Spain.'; } } $ar = array(1,2,3); $instance = new Cls(); print_r(array_map('$instance->fun', $ar)); // ^ this won't work but the first argument to array_map is supposed to be the name of the function. I want to avoid writing a wrapper function around $instance->fun, but it doesn't seem like that's possible. Is that true? Yes, you can have callbacks to methods, like this: array_map(array($instance, 'fun'), $ar) see the callback type in PHP's manual for more info Metronom You can also use array_map('Class:

Crash with Android 4.1 with ArrayMap

由 岁酱吖の 提交于 2019-11-28 10:13:57
I get an error in my code with this logcat: java.lang.NoClassDefFoundError: android.util.ArrayMap at it.dd.multiplayerit.MainActivity.<init>(MainActivity.java:88) at it.dd.multiplayerit.SwipeMainFragment$SectionsPagerAdapter.getItem(SwipeMainFragment.java:200) at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:97) at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:832) at android.support.v4.view.ViewPager.populate(ViewPager.java:982) at android.support.v4.view.ViewPager.populate(ViewPager.java:914) at android.support.v4.view.ViewPager.onMeasure

Find min/max in a two dimensional array

由 放肆的年华 提交于 2019-11-28 02:03:27
I have an array with the following format: Array ( [0] => Array ( [DateTime] => "2013-05-22 14:21:01" [Price] => 102.01 ) [1] => Array ( [DateTime] => "2013-05-23 15:55:01" [Price] => 52.60 ) [2] => Array ( [DateTime] => "2013-05-25 14:23:01" [Price] => 452.25 ) ... etc ) I need to discover the lowest and highest value of Price . min only returns they key. I've also tried max(array_map("max", $data)) but that only returns 452.25 . Will I have to use a foreach and do it manually? Here's one way to get the min and max values: $min = min(array_column($array, 'Price')); $max = max(array_column(

What is the concept of Array.map?

由 泄露秘密 提交于 2019-11-27 08:21:33
I am having problems understanding the concept of Array.map . I did go to Mozilla and Tutorials Point, but they provided very limited info regarding this. This is how I am using Array.map . It is a little complex (a bit of d3.js involved; just ignore it) var mapCell = function (row) { return columns.map(function(column) { return { column : column, value : getColumnCell(row, column) } }) } //getColumnCell is a function defined in my code //columns is array defined at the top of my code I do not understand exactly what this code is doing. I know its returning a new array and stuff but this part

Crash with Android 4.1 with ArrayMap

由 血红的双手。 提交于 2019-11-27 03:30:19
问题 I get an error in my code with this logcat: java.lang.NoClassDefFoundError: android.util.ArrayMap at it.dd.multiplayerit.MainActivity.<init>(MainActivity.java:88) at it.dd.multiplayerit.SwipeMainFragment$SectionsPagerAdapter.getItem(SwipeMainFragment.java:200) at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:97) at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:832) at android.support.v4.view.ViewPager.populate(ViewPager.java:982) at

Find min/max in a two dimensional array

由 ￡可爱￡侵袭症＋ 提交于 2019-11-26 22:05:44
问题 I have an array with the following format: Array ( [0] => Array ( [DateTime] => "2013-05-22 14:21:01" [Price] => 102.01 ) [1] => Array ( [DateTime] => "2013-05-23 15:55:01" [Price] => 52.60 ) [2] => Array ( [DateTime] => "2013-05-25 14:23:01" [Price] => 452.25 ) ... etc ) I need to discover the lowest and highest value of Price . min only returns they key. I've also tried max(array_map("max", $data)) but that only returns 452.25 . Will I have to use a foreach and do it manually? 回答1: Here's

What is the concept of Array.map?

由 别等时光非礼了梦想. 提交于 2019-11-26 17:45:18
问题 I am having problems understanding the concept of Array.map . I did go to Mozilla and Tutorials Point, but they provided very limited info regarding this. This is how I am using Array.map . It is a little complex (a bit of d3.js involved; just ignore it) var mapCell = function (row) { return columns.map(function(column) { return { column : column, value : getColumnCell(row, column) } }) } //getColumnCell is a function defined in my code //columns is array defined at the top of my code I do
订阅 array-map