Related
I have a project that needs me to remove items if one of the properties of the item I'm trying to find within the list is true. Just so it's easier understand the project I am pasting all code needed to understand it below.
fun main() {
val acct1 = AccountId(72)
val calendars = mutableListOf<CalendarDrawerCalendarItem>()
val calendars2 = mutableListOf<CalendarDrawerCalendarItem>()
calendars.add(CalendarDrawerCalendarItem(CalendarDescriptor(acct1, CalendarId(acct1, 3),"toast", true)))
calendars.add(CalendarDrawerCalendarItem(CalendarDescriptor(acct1, CalendarId(acct1, 4), "chicken", false)))
calendars.add(CalendarDrawerCalendarItem(CalendarDescriptor(acct1, CalendarId(acct1, 5), "pizza", true)))
calendars2.add(CalendarDrawerCalendarItem(CalendarDescriptor(acct1, CalendarId(acct1, 1), "bagel", true)))
// These are example calls to collapse
collapse(calendars, CalendarDrawerGroupItem(true, CalendarGroupDescriptor( acct1, "My Calendars")))
collapse(calendars2, CalendarDrawerGroupItem(false, CalendarGroupDescriptor(acct1, "Group Calendars")))
}
fun collapse(calendars: List<CalendarDrawerListItem>, group: CalendarDrawerGroupItem): List<CalendarDrawerListItem> {
val collapsedResults = mutableListOf<CalendarDrawerListItem>()
val findGroupGiven = group
collapsedResults.addAll(calendars)
if (collapsedResults.contains(findGroupGiven)) {
group.collapsed = true
// logic for deleting items here
}
return collapsedResults
}
I'll also put the classes so you can see how they're defined
data class AccountId(
val accountId: Int
)
data class CalendarId(
val accountId: AccountId,
val calendarId: Int)
data class CalendarDescriptor(
val accountId: AccountId,
val calendarId: CalendarId,
val name: String,
val isGroupCalendar: Boolean
)
data class CalendarGroupDescriptor(
val accountId: AccountId,
val name: String,
)
sealed class CalendarDrawerListItem
data class CalendarDrawerGroupItem(var collapsed: Boolean, val groupDescriptor: CalendarGroupDescriptor) : CalendarDrawerListItem()
data class CalendarDrawerCalendarItem(val calendarDescriptor: CalendarDescriptor) : CalendarDrawerListItem()
The first step I have done is I must find the given group from the group variable, within calendars. (I did this with the contains() method). Next when I find the group I have to set its collapsed variable to true and any CalendarDrawerCalendarItems after it have to be deleted.
The input will look something like (the exact numbers and values are not the important part):
Input:
calendars:
CDGroupItem(collapsed = false, groupDescriptor = GroupDescriptor(accountId = 1, name = "My calendars"))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 1, isGroup = false))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 2, isGroup = false))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 3, isGroup = false))
CDGroupItem(collapsed = false, groupDescriptor = GroupDescriptor(accountId = 1, name = "Group calendars"))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 4, isGroup = true))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 5, isGroup = true))
group: CDGroupItem(collapsed = false, groupDescriptor = GroupDescriptor(accountId = 1, name = "My calendars"))
The output should look something like this:
Output:
CDGroupItem(collapsed = true, groupDescriptor = GroupDescriptor(accountId = 1, name = "My calendars"))
CDGroupItem(collapsed = false, groupDescriptor = GroupDescriptor(accountId = 1, name = "Group calendars"))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 4, isGroup = true))
CDCalendarItem(calendarDescriptor = CalendarDescriptor(accountId = 1, calendarId = 5, isGroup = true))
Any group item that has its collapsed boolean set to true should have all calendar items deleted after it since its collapsed is set to true. Again the names and numbers are not super important. The collapsed bool is. How can I do this without hardcoding or using indicies?
Your example code doesn't use that input and output as-is so I can only give you a general example, but you could use a fold:
val result = calendars.fold(mutableListOf<CalendarDrawerListItem>()) { items, current ->
// basically 'is there a last item stored, and is it a group item, and is it collapsed'
val lastStoredIsCollapsed =
(items.lastOrNull() as? CalendarDrawerGroupItem)?.collapsed == true
if (current is CalendarDrawerCalendarItem && lastStoredIsCollapsed) items
else items.apply { add(current) }
}
It basically pipes out each item into a list, but if the last one it stored is a CalendarDrawerGroupItem with collapsed set to true, it drops drawer items. If the last one is a non-collapsed group item, it can store a drawer item, and that means the next drawer item will be stored (since the last item isn't a collapsed group)
edit: here's the for loop equivalent if it helps, with the full logic for when a calendar is not dropped (the logic in my other example is for whether it should be dropped, which can be condensed a bit):
// assuming 'calendars' is your list of items with 'collapsed' set appropriately
val result = mutableListOf<CalendarDrawerListItem)
for (calendar in calendars) {
val lastStored = result.lastOrNull()
when {
lastStored == null ->
result.add(calendar)
lastStored is CalendarDrawerGroupItem && !lastStored.collapsed ->
result.add(calendar)
lastStored is CalendarDrawerCalendarItem ->
result.add(calendar)
}
}
return result
If you're asking how to actually mutate your list so a collapsed property is set to true, that would be easy if the property was a var in your data class. Since it's a val you'll have to do something like this:
val calendarInputWithCollapsedSet = calendars.map { calendar ->
if ((calendar as? CalendarDrawerGroupItem)?.groupDescriptor == group.groupDescriptor)
calendar.copy(collapsed = true) else calendar
}
So if you find a matching group (you'll have to work out how to match them, I'm guessing) you transform it into a copy with its collapsed property set
And then you can run the fold or whatever on that new list.
I'm trying to obtain a list from a list in Javascript.
This is the list:
const cars = [
{
id: 1,
brand: "Mercedes Benz",
properties: [
{
property: "Mechanical",
value: 2,
},
{
property: "Chemical",
value: 2,
},
{
property: "Pressure",
value: 3,
}],
},
{
id: 2,
brand: "BMW",
properties: [
{
property: "Mechanical",
value: 5,
},
{
property: "Chemical",
value: 3,
},
{
property: "Pressure",
value: 6,
}],
}
]
I need the cars which match some properties property with a value greater than X, Y
For example, I want the cars which Mechanical properties have a value greater than 3 and a Pressure greater than 4. In that case I'll obtain the complete object with id 2.
Does anyone have an idea? That is having me a hard time
Tip: I paste it on a Node REPL ;)
This is what I tried but I obtain nothing:
cars.filter(car => car.properties.some((p1, p2) => {return ((p1.property === "Mechanical" && p1.value > 3) && (p2.property === "Pressure" && p2.value > 4))}))
Thanks in advance
You need to iterate all items and check each one for it's relevant condition, and if all items pass, return true. In your case you are checking each item for all conditions, and since no item's property can have both "Mechanical" and "Pressure" values at the same time, all fail.
When an array needs to pass all conditions, you should use Array.every() that will only return true, if all iterated items would return true.
To make this more generic, we can store the conditions as functions in an object or a Map. If there is a condition function for this property, we'll use the function to check the value. If not, we can return true immediately.
Note: this answer uses Optional chaining (?.) and the Nullish coalescing operator (??) to return true if the predicate doesn't exist. If your running environment doesn't support this operators replace the line with predicate[property] ? predicate[property](value) : true (see 2nd example).
const fn = (predicate, cars) =>
cars.filter(car => car.properties.every(({ property, value }) =>
predicate[property]?.(value) ?? true
))
const cars = [{"id":1,"brand":"Mercedes Benz","properties":[{"property":"Mechanical","value":2},{"property":"Chemical","value":2},{"property":"Pressure","value":3}]},{"id":2,"brand":"BMW","properties":[{"property":"Mechanical","value":5},{"property":"Chemical","value":3},{"property":"Pressure","value":6}]}]
const predicate = {
Mechanical: value => value > 3,
Pressure: value => value > 4,
}
const result = fn(predicate, cars)
console.log(result)
Or using a ternary:
const fn = (predicate, cars) =>
cars.filter(car => car.properties.every(({ property, value }) =>
predicate[property] ? predicate[property](value) : true
))
const cars = [{"id":1,"brand":"Mercedes Benz","properties":[{"property":"Mechanical","value":2},{"property":"Chemical","value":2},{"property":"Pressure","value":3}]},{"id":2,"brand":"BMW","properties":[{"property":"Mechanical","value":5},{"property":"Chemical","value":3},{"property":"Pressure","value":6}]}]
const predicate = {
Mechanical: value => value > 3,
Pressure: value => value > 4,
}
const result = fn(predicate, cars)
console.log(result)
I'm playing with the New Data API for Amazon Aurora Serverless
Is it possible to get the table column names in the response?
If for example I run the following query in a user table with the columns id, first_name, last_name, email, phone:
const sqlStatement = `
SELECT *
FROM user
WHERE id = :id
`;
const params = {
secretArn: <mySecretArn>,
resourceArn: <myResourceArn>,
database: <myDatabase>,
sql: sqlStatement,
parameters: [
{
name: "id",
value: {
"stringValue": 1
}
}
]
};
let res = await this.RDS.executeStatement(params)
console.log(res);
I'm getting a response like this one, So I need to guess which column corresponds with each value:
{
"numberOfRecordsUpdated": 0,
"records": [
[
{
"longValue": 1
},
{
"stringValue": "Nicolas"
},
{
"stringValue": "Perez"
},
{
"stringValue": "example#example.com"
},
{
"isNull": true
}
]
]
}
I would like to have a response like this one:
{
id: 1,
first_name: "Nicolas",
last_name: "Perez",
email: "example#example.com",
phone: null
}
update1
I have found an npm module that wrap Aurora Serverless Data API and simplify the development
We decided to take the current approach because we were trying to cut down on the response size and including column information with each record was redundant.
You can explicitly choose to include column metadata in the result. See the parameter: "includeResultMetadata".
https://docs.aws.amazon.com/rdsdataservice/latest/APIReference/API_ExecuteStatement.html#API_ExecuteStatement_RequestSyntax
Agree with the consensus here that there should be an out of the box way to do this from the data service API. Because there is not, here's a JavaScript function that will parse the response.
const parseDataServiceResponse = res => {
let columns = res.columnMetadata.map(c => c.name);
let data = res.records.map(r => {
let obj = {};
r.map((v, i) => {
obj[columns[i]] = Object.values(v)[0]
});
return obj
})
return data
}
I understand the pain but it looks like this is reasonable based on the fact that select statement can join multiple tables and duplicated column names may exist.
Similar to the answer above from #C.Slack but I used a combination of map and reduce to parse response from Aurora Postgres.
// declarative column names in array
const columns = ['a.id', 'u.id', 'u.username', 'g.id', 'g.name'];
// execute sql statement
const params = {
database: AWS_PROVIDER_STAGE,
resourceArn: AWS_DATABASE_CLUSTER,
secretArn: AWS_SECRET_STORE_ARN,
// includeResultMetadata: true,
sql: `
SELECT ${columns.join()} FROM accounts a
FULL OUTER JOIN users u ON u.id = a.user_id
FULL OUTER JOIN groups g ON g.id = a.group_id
WHERE u.username=:username;
`,
parameters: [
{
name: 'username',
value: {
stringValue: 'rick.cha',
},
},
],
};
const rds = new AWS.RDSDataService();
const response = await rds.executeStatement(params).promise();
// parse response into json array
const data = response.records.map((record) => {
return record.reduce((prev, val, index) => {
return { ...prev, [columns[index]]: Object.values(val)[0] };
}, {});
});
Hope this code snippet helps someone.
And here is the response
[
{
'a.id': '8bfc547c-3c42-4203-aa2a-d0ee35996e60',
'u.id': '01129aaf-736a-4e86-93a9-0ab3e08b3d11',
'u.username': 'rick.cha',
'g.id': 'ff6ebd78-a1cf-452c-91e0-ed5d0aaaa624',
'g.name': 'valentree',
},
{
'a.id': '983f2919-1b52-4544-9f58-c3de61925647',
'u.id': '01129aaf-736a-4e86-93a9-0ab3e08b3d11',
'u.username': 'rick.cha',
'g.id': '2f1858b4-1468-447f-ba94-330de76de5d1',
'g.name': 'ensightful',
},
]
Similar to the other answers, but if you are using Python/Boto3:
def parse_data_service_response(res):
columns = [column['name'] for column in res['columnMetadata']]
parsed_records = []
for record in res['records']:
parsed_record = {}
for i, cell in enumerate(record):
key = columns[i]
value = list(cell.values())[0]
parsed_record[key] = value
parsed_records.append(parsed_record)
return parsed_records
I've added to the great answer already provided by C. Slack to deal with AWS handling empty nullable character fields by giving the response { "isNull": true } in the JSON.
Here's my function to handle this by returning an empty string value - this is what I would expect anyway.
const parseRDSdata = (input) => {
let columns = input.columnMetadata.map(c => { return { name: c.name, typeName: c.typeName}; });
let parsedData = input.records.map(row => {
let response = {};
row.map((v, i) => {
//test the typeName in the column metadata, and also the keyName in the values - we need to cater for a return value of { "isNull": true } - pflangan
if ((columns[i].typeName == 'VARCHAR' || columns[i].typeName == 'CHAR') && Object.keys(v)[0] == 'isNull' && Object.values(v)[0] == true)
response[columns[i].name] = '';
else
response[columns[i].name] = Object.values(v)[0];
}
);
return response;
}
);
return parsedData;
}
My array has this dictionary I want to find and replace where dictionary h
attendance = "" and attendance = "A" and replace with attendance = "P"
I am using this:
checkedArray = [[String : AnyObject]]()
let index = find(checkedArray) { $0["attendance"] == "P" }
if let index = index {
checkedArray[index] = newDictionary
}
// Do any additional setup after loading the view.
}
func find<C: CollectionType>(collection: C, predicate: (C.Generator.Element) -> Bool) -> C.Index? {
for index in collection.startIndex ..< collection.endIndex {
if predicate(collection[index]) {
return index
}
}
return nil
}
[
{"studentID":"12","name":"panky","roll":"","attendance":"P"},
{"studentID":"14","name":"a","roll":"","attendance":""},
{"studentID":"4","name":"akshay","roll":"1","attendance":"E"},
{"studentID":"6","name":"anki","roll":"11","attendance":"P"},
{"studentID":"1","name":"mohit","roll":"2","attendance":"M"},
{"studentID":"5","name":"yogi","roll":"22","attendance":"L"},
{"studentID":"3","name":"Neha","roll":"3","attendance":"A"}
]
let dic: [[String : Any]] = [
["studentID":"12","name":"panky","roll":"","attendance":"P"],
["studentID":"14","name":"a","roll":"","attendance":""],
["studentID":"4","name":"akshay","roll":"1","attendance":"E"],
["studentID":"6","name":"anki","roll":"11","attendance":"P"],
["studentID":"1","name":"mohit","roll":"2","attendance":"M"],
["studentID":"5","name":"yogi","roll":"22","attendance":"L"],
["studentID":"3","name":"Neha","roll":"3","attendance":"A"]
]
let result : [Any] = dic.map { dictionary in
var dict = dictionary
if let attendance = dict["attendance"] as? String, attendance == "" || attendance == "A" {
dict["attendance"] = "P"
}
return dict
}
I have a jqgrid containing some data to filter. I'd like to define a combo box with some pre-defined filter sets / templates.
If a user selects an item of the combobox, the grid should automatically apply combined filters. Preferably, the combo box should be integrated into a toolbar or jqGrid's pager, but also in the html page would be fine.
For example:
COMBO BOX
Item templates filter parameters
___________
|Expired | << Timeout = true
|Last Week | << OpenDate between 02/13/2012 and 02/16/2012
|Last Month | << OpenDate between 01/01/2012 and 02/16/2012
|......... | ......
Thanks in advance for your help
jqGrid supports Searching Templates in the Advance Searching (see "Searching"/ "Search Templates" in the official jqGrid demo), but there are currently no searching templates support in the Toolbar Filtering.
I find your question very interesting. In the old question I described how one can use generic external filters to send additional information to the server. The way can be good in case of remote data, but it can't be used directly in the local grid or in the grid with the loadonce: true option.
So I created the demo which shows how the filter templates can be implemented in Toolbar Filtering and how to integrated the template in the jqGrid. I used toolbar: [true, "top"] to have additional empty toolbar above the column headers:
In the implementation I used the refreshSerchingToolbar function which I suggested originally here. It's important to understand, that the refreshSerchingToolbar function fill in the filter toolbar only the information which can be exactly represented by the filter. For example the filter for "Closed" rows can be represented in the filter toolbar (see the picture above), but the interval of dates "Last Week" and "Last Month" con't. In the cases the data in the grid will be filtered, but the corresponding fields of the filter toolbar stay empty.
The most important part of the code of the demo you can find below
var $grid = $("#list"),
initDate = function (elem) {
$(elem).datepicker({
dateFormat: 'dd-M-yy',
autoSize: true,
changeYear: true,
changeMonth: true,
showButtonPanel: true,
showWeek: true
});
},
numberTemplate = {formatter: 'number', align: 'right', sorttype: 'number', editable: true/*,
searchoptions: { sopt: ['eq', 'ne', 'lt', 'le', 'gt', 'ge', 'nu', 'nn', 'in', 'ni'] }*/},
dateTemplate = {width: 80, align: 'center', sorttype: 'date',
formatter: 'date', formatoptions: { newformat: 'd-M-Y' }, editable: true, datefmt: 'd-M-Y',
editoptions: { dataInit: initDate },
searchoptions: { sopt: ['eq', 'ne', 'lt', 'le', 'gt', 'ge'], dataInit: initDate }},
yesNoTemplate = {align: 'center', editable: true, formatter: 'checkbox',
edittype: 'checkbox', editoptions: {value: 'Yes:No', defaultValue: 'No'},
stype: 'select', searchoptions: { sopt: ['eq', 'ne'], value: ':Any;true:Yes;false:No' }},
myDefaultSearch = 'cn',
getColumnIndex = function (columnIndex) {
var cm = this.jqGrid('getGridParam', 'colModel'), i, l = cm.length;
for (i = 0; i < l; i++) {
if ((cm[i].index || cm[i].name) === columnIndex) {
return i; // return the colModel index
}
}
return -1;
},
refreshSerchingToolbar = function (myDefaultSearch) {
var filters, i, l, rules, rule, iCol, cmi, control, tagName,
$this = $(this),
postData = $this.jqGrid('getGridParam', 'postData'),
cm = $this.jqGrid('getGridParam', 'colModel');
for (i = 0, l = cm.length; i < l; i++) {
control = $("#gs_" + $.jgrid.jqID(cm[i].name));
if (control.length > 0) {
tagName = control[0].tagName.toUpperCase();
if (tagName === "SELECT") { // && cmi.stype === "select"
control.find("option[value='']")
.attr('selected', 'selected');
} else if (tagName === "INPUT") {
control.val('');
}
}
}
if (typeof (postData.filters) === "string" &&
typeof (this.ftoolbar) === "boolean" && this.ftoolbar) {
filters = $.parseJSON(postData.filters);
if (filters && filters.groupOp === "AND" && typeof (filters.groups) === "undefined") {
// only in case of advance searching without grouping we import filters in the
// searching toolbar
rules = filters.rules;
for (i = 0, l = rules.length; i < l; i++) {
rule = rules[i];
iCol = getColumnIndex.call($this, rule.field);
if (iCol >= 0) {
cmi = cm[iCol];
control = $("#gs_" + $.jgrid.jqID(cmi.name));
if (control.length > 0 &&
(((typeof (cmi.searchoptions) === "undefined" ||
typeof (cmi.searchoptions.sopt) === "undefined")
&& rule.op === myDefaultSearch) ||
(typeof (cmi.searchoptions) === "object" &&
$.isArray(cmi.searchoptions.sopt) &&
cmi.searchoptions.sopt.length > 0 &&
cmi.searchoptions.sopt[0] === rule.op))) {
tagName = control[0].tagName.toUpperCase();
if (tagName === "SELECT") { // && cmi.stype === "select"
control.find("option[value='" + $.jgrid.jqID(rule.data) + "']")
.attr('selected', 'selected');
} else if (tagName === "INPUT") {
control.val(rule.data);
}
}
}
}
}
}
},
templateClosed = {
groupOp: "AND",
rules: [
{ field: "closed", op: "eq", data: "true" }
]
},
templateLastWeek = {
groupOp: "AND",
rules: [
{ field: "invdate", op: "ge", "data": "13-Feb-2012" },
{ field: "invdate", op: "le", "data": "16-Feb-2012"}
]
},
templateLastMonth = {
groupOp: "AND",
rules: [
{ field: "invdate", op: "ge", "data": "16-Jan-2012" },
{ field: "invdate", op: "le", "data": "16-Feb-2012"}
]
},
myFilterTemplateLabel = 'Filter by Template: ',
myFilterTemplateNames = ['Closed', 'Last Week', 'Last Month'],
myFilterTemplates = [templateClosed, templateLastWeek, templateLastMonth],
iTemplate,
cTemplates = myFilterTemplateNames.length,
templateOptions = '',
reloadWithNewFilterTemplate = function () {
var iTemplate = parseInt($('#filterTemplates').val(), 10),
postData = $grid.jqGrid('getGridParam', 'postData');
if (isNaN(iTemplate)) {
$grid.jqGrid('setGridParam', {search: false});
} else if (iTemplate >= 0) {
$.extend(postData, {
filters: JSON.stringify(myFilterTemplates[iTemplate])
});
$grid.jqGrid('setGridParam', {search: true});
}
$grid.trigger('reloadGrid', [{current: true, page: 1}]);
};
$grid.jqGrid({
...
toolbar: [true, "top"],
loadComplete: function () {
var $this = $(this);
if (typeof (this.ftoolbar) !== "boolean") {
// create toolbar if needed
$this.jqGrid('filterToolbar',
{stringResult: true, searchOnEnter: true, defaultSearch: myDefaultSearch});
}
refreshSerchingToolbar.call(this, myDefaultSearch);
}
});
$.extend($.jgrid.search, {
multipleSearch: true,
multipleGroup: true,
recreateFilter: true,
closeOnEscape: true,
closeAfterSearch: true,
overlay: 0,
tmplLabel: myFilterTemplateLabel,
tmplNames: myFilterTemplateNames,
tmplFilters: myFilterTemplates
});
$grid.jqGrid('navGrid', '#pager', {edit: false, add: false, del: false});
for (iTemplate = 0; iTemplate < cTemplates; iTemplate++) {
templateOptions += '<option value="' + iTemplate + '">' +
myFilterTemplateNames[iTemplate] + '</option>';
}
$('#t_' + $.jgrid.jqID($grid[0].id)).append('<label for="filterTemplates">'+
myFilterTemplateLabel + '</label>' +
'<select id="filterTemplates"><option value="">Not filtered</option>' +
templateOptions + '</select>');
$('#filterTemplates').change(reloadWithNewFilterTemplate).keyup(function (e) {
// some web browsers like Google Chrome don't fire "change" event
// if the select will be "scrolled" by keybord. Moreover some browsers
// like Internet Explorer don't change the select option on pressing
// of LEFT or RIGHT key. Another web browsers like Google Chrome do this.
// We make refrech of the grid in any from the cases. If needed one
// could modify the code to reduce unnneded reloading of the grid,
// but for the demo with a few local rows it's such optimization
// isn't really needed
var keyCode = e.keyCode || e.which;
if (keyCode === $.ui.keyCode.PAGE_UP || keyCode === $.ui.keyCode.PAGE_DOWN ||
keyCode === $.ui.keyCode.END || keyCode === $.ui.keyCode.HOME ||
keyCode === $.ui.keyCode.UP || keyCode === $.ui.keyCode.DOWN ||
keyCode === $.ui.keyCode.LEFT || keyCode === $.ui.keyCode.RIGHT) {
reloadWithNewFilterTemplate();
}
});