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How can I get a real IP address from DNS query in Swift?

I want to get the IP address (like 192.168.0.1 or 87.12.56.50) from DNS query in Swift. I tried 100 ... entries? Do a simple DNS lookup in Swift See Question&Answers more detail:os...

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

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asp.net - Upload large files in .NET

I've done a good bit of research to find an upload component for .NET that I can use to upload large files ... for components that can do that? 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 obtain the correct physical size of the monitor?

How can I get the size of the display in centimeters or inches? This code does not always works correctly: ... have a constant physical size. See Question&Answers more detail:os...

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

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variables - Comparing IEEE floats and doubles for equality

What is the best method for comparing IEEE floats and doubles for equality? I have heard of several methods, ... see what the community thought. 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 - WooCommerce: Check if items are already in cart

I found this great snippet from this website The following is the function to check if a specific product exists in ... in cart } Thanks. source See Question&Answers more detail:os...

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

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Tell git not to merge binary files but to choose

When the binary files, swfs, jars and flvs are changed locally, and I try to pull in changes, git tries to ... one of these versions to use. See Question&Answers more detail:os...

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

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Assigning in Java?

Say I set int A = int B. When I change A after, it will not change the value of B. But when I set ... Java is assigned by value, not reference? 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 - Creating intersecting images in matplotlib with imshow or other function

I have two 3-D arrays of ground penetrating radar data. Each array is basically a collection of time-lapse 2-D ... can be combined with 3D axes? See Question&Answers more detail:os...

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

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android - Find all Bluetooth devices (headsets, phones etc) nearby, without forcing the devices in discoverable mode

My goal: To detect all nearby Bluetooth devices(phones, headsets, etc.) from my Android application. Here's a ... devices which are turned on. 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 there a 128 bit integer in C++?

I need to store a 128 bits long UUID in a variable. Is there a 128-bit datatype in C++? I do not need ... from C++11 would be fine, too. See Question&Answers more detail:os...

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

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What do dot and hash symbols mean in JQuery?

I feel confused of the dot and hash symbols in the following example: <DIV ID="row"> <DIV ID="c1"> <Input ... DIV instead of using "#row div" ? See Question&Answers more detail:os...

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

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sql - Why does VARCHAR need length specification?

Why do we always need to specify VARCHAR(length) instead of just VARCHAR? It is dynamic anyway. UPD: I'm puzzled ... mandatory (e.g. in MySQL). See Question&Answers more detail:os...

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

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google app engine - AppEngine Error [ java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal ]

i was looking to find a solution for this problem but seems difficult. I have appengine project working with a ... ... 44 more Thanks all 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 test if an object is a Proxy?

I would like to test if a JavaScript object is a Proxy. The trivial approach if (obj instanceof Proxy) ... ... an arbitrary object is a Proxy? See Question&Answers more detail:os...

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

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algorithm - Complexity of list.index(x) in Python

I'm referring to this: http://docs.python.org/tutorial/datastructures.html What would be the running time of list. ... terms of big O notation? See Question&Answers more detail:os...

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

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installation - Error installing a crate via cargo: specified package has no binaries

I'm trying to install a Rust crate on my system (Arch Linux) using Cargo. I can search for crates and find what ... 0.10.0 (10ddd7d 2016-04-08) See Question&Answers more detail:os...

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

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sql - Can I set ignore_dup_key on for a primary key?

I have a two-column primary key on a table. I have attempted to alter it to set the ignore_dup_key to on ... should I set IGNORE_DUP_KEY to on? 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 - AJAX, Subdomains, and SSL

I have a site, foo.com, that makes ajax requests to bar.foo.com. Will this work. Also, if foo ... these two sites use different certificates? 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 - Access child iFrame DOM from parent page

Here is the deal: domain.com/page -- Parent page (document.domain=domain.com) contains an iframe sub.domain. ... on the rendered parent page? 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 synchronize scrolling positions for several iframes

I have an HTML layout based on tabs (say 5). In each tab I load an iframe. The iframe contents are ... place as already opened iframes. Thanks. See Question&Answers more detail:os...

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

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entity framework - ObjectContext.Refresh()?

How to update ALL the dirty entities from the data store, and reset their changed values to the original store ... the entities to be refreshed. 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++ - Can std::begin work with array parameters and if so, how?

I have trouble using std::begin() and std::end() (from the iterator library) with c-style array ... iterator functions on array parameters? 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 - Difference between spring batch remote chunking and remote partitioning

What is the difference between spring batch remote chunking and remote partitioning? I can not understand the ... Could anybody please explain? See Question&Answers more detail:os...

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

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sql - How to get a list of months between two dates in mysql

I hve to get the list of months between two dates in mysql. For Example:My Input is From date 23-01-2013 To ... Feb 2014, Mar 2014, Apr 2014. 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 - Prevent suffix from being added to resources when page loads

I have a JSF2 application running and working no problem. The issue I am having with JSF is with the resource ... figuring out this last issue? 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 - Decimal to Fraction conversion in Swift

I am building a calculator and want it to automatically convert every decimal into a fraction. So if the user ... 3/17) would be great! See Question&Answers more detail:os...

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

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android - How to get the key from the value in firebase

How do I get the key "-KLpcURDV68BcbAvlPFy" when I know the field "name" contains "efg" in the ... String clubkey =dataSnapshot.getKey(); 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 - dplyr - Group by and select TOP x %

Using the package dplyr and the function sample_frac it is possible to sample a percentage from every group. ... dplyr's group_by function. See Question&Answers more detail:os...

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

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