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cql - cassandra get all records in time range

I have to work with a column family that has (user_id, timestamp) as key. In my query I would like to fetch ... de we have to change the design? 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 - Function and variable with the same name

The following code-snippet is a test to see what happens when a function and a variable share the same name in the ... /script> </body> </html> See Question&Answers more detail:os...

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

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AngularJS dependency injection of value inside of module.config

Trying to setup some helpers value to the module. Tried with service and value and it didn't help: var finance = ... ); What I am doing wrong? See Question&Answers more detail:os...

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

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ios - How to do some stuff in viewDidAppear only once?

I want to check the pasteboard and show an alert if it contains specific values when the view appears. I ... of the view controller instance. See Question&Answers more detail:os...

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

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r - World map with ggmap

I am using ggmap and wish to have a map of the world centered on Australia to which I can easily plot geocoded ... 2.1 stringr_0.6 tools_2.15.0 See Question&Answers more detail:os...

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

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c# - WPF - Set Focus when a button is clicked - No Code Behind

Is there a way to set Focus from one control to another using WPF Triggers? Like the following example: <Page ... doing it outside the XAML. See Question&Answers more detail:os...

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

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java - SSL Connection Reset

I am attempting to connect to an HTTPS endpoint in Java. Every method I have tried (more details below) ends up ... NuSOAP/0.7.3 (1.114) See Question&Answers more detail:os...

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

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c# - How to make ObservableCollection thread-safe?

System.InvalidOperationException: Collection was modified; enumeration operation may not execute. I am adding/removing from an ... me on this? See Question&Answers more detail:os...

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

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jquery - JavaScript: Know when an image is fully loaded

If I have a beacon: <img src="http://example.com/beacon" /> I want a method to be called once the beacon ... Is it possible? Is it in jQuery? See Question&Answers more detail:os...

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

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p2p - How NAT traversal works in case of peer to peer protocols like bittorrent.

I know about NAT traversal and about STUN, TURN and ICE and its use. I want to know whether these are ... with other peer behind NAT ? See Question&Answers more detail:os...

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

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Parsing JSON array with PHP foreach

Wondering why my PHP code will not display all "Value" of "Values" in the JSON data: $user = json_decode(file_get_contents( ... :00+0000" }, ... See Question&Answers more detail:os...

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

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csv - Modify an existing Excel file using Openpyxl in Python

I am basically trying to copy some specific columns from a CSV file and paste those in an existing excel file ... openpyxl or any other package? See Question&Answers more detail:os...

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

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c++ - What is the safe way to fill multidimensional array using std::fill?

Here is what I am using: class something { char flags[26][80]; } a; std::fill(&a.flags[0][0], &a.flags ... that I am using this inside a class.) See Question&Answers more detail:os...

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

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pointers - allocate matrix in C

i want to allocate a matrix. is this the only option: int** mat = (int**)malloc(rows * sizeof(int*)) for ( ... int*)malloc(col * sizeof(int)); } See Question&Answers more detail:os...

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

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Private members in Java inheritance

I was told that for a Java subclass it can inherit all members of its superclass. So does this mean even ... . I am now totally confused. See Question&Answers more detail:os...

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

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Python conversion between coordinates

Are there functions for conversion between different coordinate systems? For example, Matlab has [rho,phi] = cart2pol(x ... in numpy or scipy. See Question&Answers more detail:os...

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

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ios - Code sign error : bundle format unrecognized, invalid, or unsuitable

Im working on an iOS app, Swift language, iOS8, Xcode 6.1. It was running fine on the iPad. Then I ... causing this problem. Any help please? See Question&Answers more detail:os...

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

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html - text-align: right; only for placeholder?

how can active text-align: right; only for placeholder? <input type="text" name="airline_search" style=" ... align: right; for placeholder. See Question&Answers more detail:os...

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

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409 views

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Python: Get URL path sections

How do I get specific path sections from a url? For example, I want a function which operates on this: http:// ... only a section of the path. 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 - How to set multiple attributes with one value function?

Given a datum containing multiple data elements, such as an object or array, is it possible to set multiple attributes on ... { return d.r; }); See Question&Answers more detail:os...

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

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194 views

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Python: Random selection per group

Say that I have a dataframe that looks like: Name Group_Id AAA 1 ABC 1 CCC 2 XYZ 2 DEF 3 YYH 3 How could I ... Name Group_Id AAA 1 XYZ 2 DEF 3 See Question&Answers more detail:os...

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

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774 views

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dart - Persisting AppBar Drawer across all Pages Flutter

I am trying to create a uniform drawer that is accessible across all pages in my app. How do I make it ... widget in every single dart file? See Question&Answers more detail:os...

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

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performance - Is ternary operator, if-else or logical OR faster in javascript?

Which method is faster or more responsive in javascript, if-else, the ternary operator or logical OR? Which is ... to use, for what reasons? See Question&Answers more detail:os...

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

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239 views

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android - Send Post Request with params using Retrofit

I'm trying unsuccessfully to consume an API on Android using Retrofit library but while using POSTMAN I can see ... to parse the response. See Question&Answers more detail:os...

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

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470 views

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c++ - Why is partial specialization of a nested class template allowed, while complete isn't?

template<int x> struct A { template<int y> struct B {};. template<int y, int unused> struct C {} ... depend on the outer template parameter. See Question&Answers more detail:os...

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

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334 views

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.net - When is a method eligible to be inlined by the CLR?

I've observed a lot of "stack-introspective" code in applications, which often implicitly rely on their containing ... CLR allowed to inline? See Question&Answers more detail:os...

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

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169 views

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How to find a value in an excel column by vba code Cells.Find

I have to find a value celda in an Excel sheet. I was using this vba code to find it: Set cell = Cells. ... I have to use the value nothing. See Question&Answers more detail:os...

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

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312 views

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c# - Timer in Portable Library

I can't find a timer in portable library / Windows Store. (Targeting .net 4.5 and Windows Store aka Metro) ... refreshn once a second or so See Question&Answers more detail:os...

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

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