hashmap | HashMap JavaScript class for Node | Runtime Evironment library
kandi X-RAY | hashmap Summary
kandi X-RAY | hashmap Summary
HashMap JavaScript class for Node.js and the browser. The keys can be anything and won't be stringified
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Top functions reviewed by kandi - BETA
- Merge another object
- Hide a property from an object
- add multiple args
hashmap Key Features
hashmap Examples and Code Snippets
Lines of Code : 54
License : No License
Copy$ cat > ./packages/api-server/.env <
GODWOKEN_READONLY_JSON_RPC=
ETH_ACCOUNT_LOCK_HASH=
ROLLUP_TYPE_HASH=
ROLLUP_CONFIG_HASH=
CHAIN_ID=
CREATOR_ACCOUNT_ID=
DEFAULT_FROM_ADDRESS=
POLYJUICE_VALIDATOR_TYPE_HASH=
L2_SUDT_VALIDATOR_SCRIPT_TYPE_HASH= var SuperHash = require('superhash');
var hashMap = new SuperHash();
var data = 'value'; private static void iterateIdentityHashMap(IdentityHashMap identityHashMap) {
// Iterating using entrySet
System.out.println("Iterating values: ");
Set> entries = identityHashMap.entrySet();
for (Map.Entry entry: en public static IdentityHashMap createWithSimpleData() {
IdentityHashMap identityHashMap = new IdentityHashMap<>();
identityHashMap.put("title", "Harry Potter and the Goblet of Fire");
identityHashMap.put("author", "J. K. {
"success": true,
"data": {
"summary": {
//...
},
"unofficial-summary": [
{
//...
}]
}
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new Htt @override
Future> doAddOrderApiCall(
RequestCheckOut requestCheckOut) async {
final String url = liveUrl + "user/order/product";
print("Add Order ");
print(url);
return await dopostOApiCallWithToken(
#What the script does:
# 1. Takes the X&Y coordinates of a work order in Maximo
# 2. Generates a URL from the coordinates
# 3. Executes the URL via a separate script/library (LIB_HTTPCLIENT)
# 4. Performs a spatial quer@Test() public void Chrome_javascript_disable() throws InterruptedException {
System.setProperty("webdriver.chrome.driver", "C:\\Users\\AnkitP\\Desktop\\Selenium\\chromedriver.exe");
ChromeOptions options = new ChromeOptions();
export class SidebarService {
someNecessaryId: number;
// I keep the front-end related items here for the moment
itemsMap: { [key: tsring]: Item } = {}; // keep an Hashmap or object dictionary for faster reads
items$: Observable;
class App extends Component {
constructor(props){
super(props)
this.state = {
response: '',
get: '',
post: '',
responseToPost: '',
responseToGet: '',
data: {},
message: '',
beamMap:Community Discussions
Trending Discussions on hashmap
QUESTION
Given a list of Strings:
...ANSWER
Answered 2022-Mar-22 at 07:13This problem should be solved easily using a trie.
The trie node should basically keep a track of 2 things:
- Child nodes
- Count of prefixes ending at current node
Insert all strings in the trie, which will be done in O(string length * number of strings). After that, simply traversing the trie, you can hash the prefixes based on the count as per your use case. For suffixes, you can use the same approach, just start traversing the strings in reverse order.
Edit:
On second thought, trie might be the most efficient way, but a simple hashmap implementation should also work here. Here's an example to generate all prefixes with count > 1.
QUESTION
I'm working on a request validation feature where I need to check if a certain string value is present in a property that is contained in an object, which is contained as a value of a map entry, that map is a part of an object and finally my request body contains a set of those objects.
To try and make it clearer I will recreate my situation using only parts of code that are important.
Lets say my ClassA is received in request body, it has following properties:
ANSWER
Answered 2022-Jan-05 at 14:22I'd try making use of Stream.filter(). Something like Stream.filter(x -> x!=null) should work instead of (and be more elegant than) if statements.
In your case it would be necessary before every one of your object or field (that is nullable) getters I'm afraid. But that's the most streamish' way I'd go for.
You can also use it in conjuction with the isEmpty() method for cases of empty maps.
An alternative would be to add if statements within your getter functions. That would allow you to keep the exact stream you wrote already.
QUESTION
I Generates a checkbox list from the map. Now how to set the value for the key (false / true) and now I can download it in UserConfig so that I can use this value in the rest of the project.
My view:
...ANSWER
Answered 2021-Dec-28 at 12:45With Preprocessing (if I got you right), we could try something like:
QUESTION
The following code produces the lifetime errors below despite the fact that the V instance in question is owned.
ANSWER
Answered 2021-Dec-23 at 08:01Use a higher-rank trait bound denoted by for<'a>:
QUESTION
Got a Map> mapOfMaps variable.
ANSWER
Answered 2021-Dec-15 at 10:16One possible, but still rather clunky, solution is a helper function:
QUESTION
Given a sorted array like [1,2,4,4,4]. Each element in the array should occur exactly same number of times as element. For Example 1 should occur 1 time, 2 should occur 2 times, n should occur n times, After minimum number of moves, the array will be rendered as [1,4,4,4,4]
ANSWER
Answered 2021-Sep-24 at 19:58The error is in this comparison:
QUESTION
I have this class:
...ANSWER
Answered 2021-Sep-18 at 07:25Double check your jwt token. I think it miss sub attribute( subject or username here).
I also highly recommend you write the few unit test for few class such as JwtTokenUtil to make sure your code working as expected. You can use spring-test to do it easily.
It help you discover the bug easier and sooner.
Here is few test which i used to test the commands "jwt generate" and "jwt parse"
QUESTION
I was wondering what was the complexity of the replace(Key , Value) for a HashMap is.
My initial thoughts are O(1) since it's O(1) to get the value and I can simply replace the value assigned to the key.
I'm unsure as to if I should take into account collisions that there might be in a large hashmap implemented in java with java.util.
ANSWER
Answered 2021-Aug-25 at 10:30HashMap#replace runs in O(1) amortized;
and under the premise that the map is properly balanced, which Java takes care of during your put and remove calls, also non-amortized.
The fact whether it also holds for non-amortized analysis hinges on the question regarding the implemented self-balancing mechanism.
Basically, due to replace only changing the value which does not influence hashing and the general structure of the HashMap, replacing a value will not trigger any re-hashing or re-organization of the internal structure.
Hence we only pay for the cost of locating the key, which depends on the bucket size.
The bucket size, if the map is properly self-balanced, can be considered a constant. Leading to O(1) for replace also non-amortized.
However, the implementation triggers self-balancing and re-hashing based on heuristic factors only. A deep analysis of that is a bit more complex.
So the reality is probably somewhere in between due to the heuristics.
ImplementationTo be sure, let us take a look at the current implementation (Java 16):
QUESTION
From the bird's view, my question is: Is there a universal mechanism for as-is data serialization in Haskell?
The origin of the problem does not root in Haskell indeed. Once, I tried to serialize a python dictionary where a hash function of objects was quite heavy. I found that in python, the default dictionary serialization does not save the internal structure of the dictionary but just dumps a list of key-value pairs. As a result, the de-serialization process is time-consuming, and there is no way to struggle with it. I was certain that there is a way in Haskell because, at my glance, there should be no problem transferring a pure Haskell type to a byte-stream automatically using BFS or DFS. Surprisingly, but it does not. This problem was discussed here (citation below)
Current ProblemCurrently, there is no way to make HashMap serializable without modifying the HashMap library itself. It is not possible to make Data.HashMap an instance of Generic (for use with cereal) using stand-alone deriving as described by @mergeconflict's answer, because Data.HashMap does not export all its constructors (this is a requirement for GHC). So, the only solution left to serialize the HashMap seems to be to use the toList/fromList interface.
I have quite the same problem with Data.Trie bytestring-trie package. Building a trie for my data is heavily time-consuming and I need a mechanism to serialize and de-serialize this tire. However, it looks like the previous case, I see no way how to make Data.Trie an instance of Generic (or, am I wrong)?
So the questions are:
Is there some kind of a universal mechanism to project a pure Haskell type to a byte string? If no, is it a fundamental restriction or just a lack of implementations?
If no, what is the most painless way to modify the bytestring-trie package to make it the instance of Generic and serialize with
Data.Store
ANSWER
Answered 2021-Jul-01 at 18:53- There is a way using compact regions, but there is a big restriction:
Our binary representation contains direct pointers to the info tables of objects in the region. This means that the info tables of the receiving process must be laid out in exactly the same way as from the original process; in practice, this means using static linking, using the exact same binary and turning off ASLR. This API does NOT do any safety checking and will probably segfault if you get it wrong. DO NOT run this on untrusted input.
This also gives insight into universal serialization is not possible currently. Data structures contain very specific pointers which can differ if you're using different binaries. Reading in the raw bytes into another binary will result in invalid pointers.
There is some discussion in this GitHub issue about weakening this requirement.
- I think the proper way is to open an issue or pull request upstream to export the data constructors in the internal module. That is what happened with
HashMapwhich is now fully accessible in its internal module.
Update: it seems there is already a similar open issue about this.
QUESTION
ANSWER
Answered 2021-Mar-26 at 08:51The getOrDefault() will return the default value when the key is not found, as per the documentation.
If the key is found but the value is null, then null will be returned.
So, it seems that your map actually contains the key but the corresponding value is null.
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