storage

Indexeddb adds a new value instead of updating an existing value

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-07 18:12:35
问题 When attempting to update a record within indexeddb using the put method, it appears that a new value is created rather than a change. According to MDN this is the method to update a record, yet I'm not having the expected result. Any ideas? Here is my code example. /* @keys initalisation */ extension.onupgradeneeded = function (event) { database = event.target.result; if (!database.objectStoreNames.contains('profile')) { var _profile = database.createObjectStore('profile', { autoIncrement:

React Native: write in AsyncStorage with java

由 时光毁灭记忆、已成空白 提交于 2019-12-07 17:20:21
问题 So I have this text on the java-side that arrives from an Intent , which I'd like to save to AsyncStorage to being able to access it through React afterwards. Any chance I can achieve this? I have: package com.myapp; import android.app.Activity; import android.os.Bundle; import android.view.KeyEvent; import android.content.Intent; import com.facebook.react.LifecycleState; import com.facebook.react.ReactInstanceManager; import com.facebook.react.ReactRootView; import com.facebook.react.modules

NodeJs - Loopback : How to upload file on google cloud storage

由 假装没事ソ 提交于 2019-12-07 15:55:29
In loopback framework, we have a module LoopBack Storage Component. It's support for many clouds except Google Cloud Storage. But I have to use Google Cloud. It should support Google out of the box because it uses pkgcloud lib which has support for Google Cloud. Try simply adding a config entry to the providers.json file. For more info on how to do that check Loopback storage component documentation and also pkgcloud config format for Google Cloud. I'd just try something like this in the providers.json: { "google": { "keyFilename": "/path/to/a/keyfile.json", "projectId": "your-project-id" } }

How to use NSURLIsExcludedFromBackupKey Or kCFURLIsExcludedFromBackupKey?

由 只愿长相守 提交于 2019-12-07 13:24:43
问题 My App had been rejected because I save in-app purchase data in Documents folder on iPhone. Data that can be recreated but must persist for proper functioning of your app - or because customers expect it to be available for offline use - should be marked with the "do not back up" attribute. For NSURL objects, add the NSURLIsExcludedFromBackupKey attribute to prevent the corresponding file from being backed up. For CFURLRef objects, use the corresponding kCFURLIsExcludedFromBackupKey attribute

Postgresql vs. MySQL: how do their data sizes compare to each other?

由 烂漫一生 提交于 2019-12-07 08:59:08
问题 For the same data set, with mostly text data, how do the data (table + index) size of Postgresql compared to that of MySQL? Postgresql uses MVCC, that would suggest its data size would be bigger In this presentation, the largest blog site in Japan talked about their migration from Postgresql to MySQL. One of their reasons for moving away from Postgresql was that data size in Postgresql was too large (p. 41): Migrating from PostgreSQL to MySQL at Cocolog, Japan's Largest Blog Community

Why do du and Perl's -s give different values for the file size?

由 ☆樱花仙子☆ 提交于 2019-12-07 08:20:27
问题 Updated According to comments: I have outlog.txt file which contains multiple filenames, e.g: 2345_535_Dell&HP_3PAR_DEAL.txt , similarly there are many filename but not the actual folder where the files are located and so in code am appending filenames to folderpath to get actual file location. Now,I want to get disk usage of all the files present in outlog.txt and also total disk usage of all files present in outlog.txt . I have tried two approaches perl -s and my ($size) = split(' ', du `"

Android App Security

由 纵然是瞬间 提交于 2019-12-07 07:54:50
问题 I want to develop an app where User data is very sensitive. I am new to dev. so not sure this following techniques are necessary for security or efficient. Please leave your comment. Thanks in advance. For extra security can we avoid market(play store) and install the app on individual device. Does it make it more secure? I have to store data on the device. How can we make the data secured so other apps can't read it? 回答1: Yes, you can install your app without using the Google Play app.

How to read/write external USB storage on Android?

由 别等时光非礼了梦想. 提交于 2019-12-07 07:25:41
问题 I am currently making an app that needs to be able to read from and write to a USB flash drive connected via a USB OTG adapter. Is there an easy way to access this storage via standard Java.io.File APIs? This app is only going to be run on a rooted Motorola Xoom running Android 4.2.2. Any suggestions would be appreciated. 回答1: USB Drives get mounted to your device just like an SDCard does essentially*. The mount path usually resides at: /storage/usb0/ I have not used this on many devices

When exactly is a thread_local variable declared at global scope initialized?

由 一个人想着一个人 提交于 2019-12-07 05:21:54
问题 For example: #include <thread> thread_local int n = 1; void f() { ++n; // is n initialized here for each thread or prior to entering f()? } int main() { std::thread ta(f); std::thread tb(f); ta.join(); tb.join(); } It's still not entirely clear from here when is n initialized. 回答1: Simple enough, and all according to specification. n is going to be initialized whenever the new thread is run - before you enter any thread-specific functions. To be exact, it is going to be initialized three

How to get exact capacity from storage

由 ☆樱花仙子☆ 提交于 2019-12-07 04:54:36
I want to read the exact capacity from the intern storage programmatically. I's a Samsung Galaxy S7 Edge 32GB device what I am using. In the preinstalled Samsung FileManager (In German: Eigene Dateien) it shows me the total capacity of 32GB. Even in the menu => settings => Storage it shows me 32GB. (Showed in screenshots) When I use my code below it shows me a total capacity of 24,4GB. (Showed in Log at the end of the post) Question: How to get the exact 32GB total capacity of my device? Screenshots Full Code: package spicysoftware.com.space; import android.os.Environment; import android.os
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