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iphone - Round double value to 2 decimal places

I have a double value as 22.368511 I want to round it to 2 decimal places. i.e. it should return 22.37 How can I do that? See Question&Answers more detail:os...

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javascript - Convert URL to File or Blob for FileReader.readAsDataURL

Reference: FileReader.readAsDataURL Considering the following example: function previewFile(file) { var reader = new ... a Firefox Addon? See Question&Answers more detail:os...

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python - When scattering Flask Models, RuntimeError: 'application not registered on db' was raised

I am re-factoring my Flask application by scattering the models, blueprints but I am having a runtime error. def ... did you solve it? Thanks See Question&Answers more detail:os...

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asp.net mvc - Is it possible to create a generic @helper method with Razor?

I am trying to write a helper in Razor that looks like the following: @helper DoSomething<T, U>(Expression<Func<T, ... so, what is the syntax? See Question&Answers more detail:os...

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utf 8 - Force character vector encoding from "unknown" to "UTF-8" in R

I have a problem with inconsistent encoding of character vector in R. The text file which I read a table from is ... stringr_0.6.2 tools_3.0.3 See Question&Answers more detail:os...

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c# - ItemsControl with horizontal orientation

Do you know any controls inherited from the ItemsControl that have horizontal orientation of items? See Question&Answers more detail:os...

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node.js - Global Variable in app.js accessible in routes?

How do i set a variable in app.js and have it be available in all the routes, atleast in the index. ... using the express framework and node.js See Question&Answers more detail:os...

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android - Getting "debuggable" value of androidManifest from code?

I've written a wrapper on top of Log.java that is provided by android. My Class will add some other application level ... do that? If yes, how? See Question&Answers more detail:os...

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Idiomatic way to wait for multiple callbacks in Node.js

Suppose you need to do some operations that depend on some temp file. Since we're talking about Node here, ... solve this kind of problem? See Question&Answers more detail:os...

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Python: reload component Y imported with 'from X import Y'?

In Python, once I have imported a module X in an interpreter session using import X, and the module changes on ... module Y from a package X. See Question&Answers more detail:os...

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c++ - Is using #pragma warning push/pop the right way to temporarily alter warning level?

Once in a while it's difficult to write C++ code that wouldn't emit warnings at all. Having warnings ... better ways to achieve the same? See Question&Answers more detail:os...

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objective c - What is the difference between valueforKey:, objectForKey:, and valueForKeyPath:?

I have 2 questions: What is the difference between valueForKey: and objectForKey:? Is it that one is for ... Core Data? Please help. See Question&Answers more detail:os...

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file - Java: splitting the filename into a base and extension

Is there a better way to get file basename and extension than something like File f = ... String name = f.getName ... " : name.substring(dot+1); See Question&Answers more detail:os...

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symfony - Why composer install timeouts after 300 seconds?

I have small project made in symfony2 when I try to build it on my server it's always fails when unzipping ... the timeout of 300 seconds. See Question&Answers more detail:os...

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javascript - jQuery animated number counter from zero to value

I have created a script to animate a number from zero to it's value. Working jQuery $({ Counter: 0 }). ... <span class="Single">150</span> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Remove non-ascii characters from string

I'm getting strange characters when pulling data from a website: ? How can I remove anything that isn't ... chars for all languages supported See Question&Answers more detail:os...

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unix - How do I manipulate $PATH elements in shell scripts?

Is there a idiomatic way of removing elements from PATH-like shell variables? That is I want to take PATH=/home ... the $PATH variable in Bash? See Question&Answers more detail:os...

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c# - Adding headers when using httpClient.GetAsync

I'm implementing an API made by other colleagues with Apiary.io, in a Windows Store app project. They ... Authorization header to the request? See Question&Answers more detail:os...

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android - Session 'app' error while installing APK

I am having difficulty importing a project written on Android Studio 1.1 into Android Studio 2.1.2. I keep ... . Error message from Grable Build See Question&Answers more detail:os...

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Android Singleton with Global Context

Per the Android Documentation it states: There is normally no need to subclass Application. In most situation ... the getApplicationContext()? See Question&Answers more detail:os...

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c# - Will the base class constructor be automatically called?

class Person { public int age; public Person() { age = 1; } } class Customer : Person { public Customer() { age += 1; } ... () { ............. } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Socket.io Client: respond to all events with one handler?

Is it possible to have a socket.io client respond to all events without to have specify each event individually? ... . Is this possible? How? See Question&Answers more detail:os...

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c++ - Fast n choose k mod p for large n?

What I mean by "large n" is something in the millions. p is prime. I've tried http://apps.topcoder.com/wiki/ ... , value)); return value; } } See Question&Answers more detail:os...

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String Padding in C

I wrote this function that's supposed to do StringPadRight("Hello", 10, "0") -> "Hello00000". char *StringPadRight ... . How can I fix this? See Question&Answers more detail:os...

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android - How to check Google Play services version?

In my application, I need to check Google Play services version (which is installed in user's device). Is it ... but I could not find anything! See Question&Answers more detail:os...

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How to install Typescript typings for google maps

How can it be done - I've tried combinations of typings install [googlemaps | google.maps] [--ambient] -- ... : Cannot find namespace 'google'. See Question&Answers more detail:os...

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java - difference fn(String... args) vs fn(String[] args)

Whats this syntax useful for : function(String... args) Is this same as writing function(String[] args) ... other feature involved with it ? See Question&Answers more detail:os...

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Using ping in c#

When I Ping a remote system with windows it says there is no reply, but when I ping with c# it says success. Windows ... Send("192.168.2.18"); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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