Tutorial by Examples: ha

In order to test the beginning and ending of a given string in Python, one can use the methods str.startswith() and str.endswith(). str.startswith(prefix[, start[, end]]) As it's name implies, str.startswith is used to test whether a given string starts with the given characters in prefix. >...

Python's str type also features a number of methods that can be used to evaluate the contents of a string. These are str.isalpha, str.isdigit, str.isalnum, str.isspace. Capitalization can be tested with str.isupper, str.islower and str.istitle. str.isalpha str.isalpha takes no arguments and retu...

try/catch try..catch blocks can be used to control the flow of a program where Exceptions may be thrown. They can be caught and handled gracefully rather than letting PHP stop when one is encountered: try { // Do a bunch of things... throw new Exception('My test exception!'); } catch (E...

Usually, you have to use git add or git rm to add changes to the index before you can git commit them. Pass the -a or --all option to automatically add every change (to tracked files) to the index, including removals: git commit -a If you would like to also add a commit message you would do: g...

6 ES6's Object.assign() function can be used to copy all of the enumerable properties from an existing Object instance to a new one. const existing = { a: 1, b: 2, c: 3 }; const clone = Object.assign({}, existing); This includes Symbol properties in addition to String ones. Object rest/sp...

Creating jobs To create an job, just append a single & after the command: $ sleep 10 & [1] 20024 You can also make a running process a job by pressing Ctrl + z: $ sleep 10 ^Z [1]+ Stopped sleep 10 Background and foreground a process To bring the Process to the f...

a = 1 - Math.abs(1 - a % 2); // This will throw an error if my arithmetic above is wrong. assert a >= 0 && a <= 1 : "Calculated value of " + a + " is outside of expected bounds"; return a;

Dropbox.authorizedClient!.files.download(path: path, destination: destination).response { response, error in if let (metadata, url) = response { print("*** Download file ***") print("Downloaded file name: \(metadata.name)") print("Downloaded f...

This uses the SwiftyDropbox library to upload a file from a NSData to the Dropbox account, using upload sessions for larger files, handling every error case: import UIKit import SwiftyDropbox class ViewController: UIViewController { // replace this made up data with the real data le...

This uses the SwiftyDropbox library to share a folder, handling every error case: Dropbox.authorizedClient!.sharing.shareFolder(path: "/folder_path").response { response, error in if let result = response { print("response: \(result)") } else if let callError ...

curl -X POST https://api.dropboxapi.com/2/sharing/share_folder \ --header "Authorization: Bearer <ACCESS_TOKEN>" \ --header "Content-Type: application/json" \ --data "{\"path\": \"/folder_path\",\"member_policy\&q...

curl -X POST https://api.dropboxapi.com/2/sharing/add_folder_member \ --header "Authorization: Bearer <ACCESS_TOKEN>" \ --header "Content-Type: application/json" \ --data "{\"shared_folder_id\": \"<SHARED_FOLDER_ID\",\"members...

let toInvite = [Sharing.AddMember(member: Sharing.MemberSelector.Email("<EMAIL_ADDRESS_TO_INVITE>"))] Dropbox.authorizedClient!.sharing.addFolderMember(sharedFolderId: "<SHARED_FOLDER_ID>", members: toInvite).response { response, error in if (response != nil...

// List folder Dropbox.authorizedClient!.files.listFolder(path: "/nonexistantpath").response { response, error in print("*** List folder ***") if let result = response { print("Folder contents:") for entry in result.entries { pr...

This uses the Dropbox Python SDK to create a shared link for a folder: import dropbox dbx = dropbox.Dropbox("<ACCESS_TOKEN>") shared_link_metadata = dbx.sharing_create_shared_link_with_settings("/Testing") print shared_link_metadata.url <ACCESS_TOKEN> should be...

curl -X POST https://api.dropboxapi.com/2/sharing/list_shared_links \ --header "Authorization: Bearer <ACCESS_TOKEN>" \ --header "Content-Type: application/json" \ --data "{\"path\": \"/test.txt\", \"direct_only\": true}&quo...

Dropbox.authorizedClient!.sharing.createSharedLink(path: "/test.txt").response({ response, error in if let link = response { print(link.url) } else { print(error!) } })

curl -X POST https://api.dropboxapi.com/2/sharing/create_shared_link_with_settings \ --header "Authorization: Bearer <ACCESS_TOKEN>" \ --header "Content-Type: application/json" \ --data "{\"path\": \"/Prime_Numbers.txt\",\"settin...

A replacer function can be used to filter or transform values being serialized. const userRecords = [ {name: "Joe", points: 14.9, level: 31.5}, {name: "Jane", points: 35.5, level: 74.4}, {name: "Jacob", points: 18.5, level: 41.2}, {name: "Jessie",...

A reviver function can be used to filter or transform the value being parsed. 5.1 var jsonString = '[{"name":"John","score":51},{"name":"Jack","score":17}]'; var data = JSON.parse(jsonString, function reviver(key, value) { return ke...