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hadoop - Cannot Read a file from HDFS using Spark

I have installed cloudera CDH 5 by using cloudera manager. I can easily do hadoop fs -ls /input/war-and-peace. ... .com/questions/27478096/cannot-read-a-file-from-hdfs-using-spark...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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96 views

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Interview : Java Equals

I was asked this question in interview. Which of the following is better to use MyInput.equals("Something ... from:https://stackoverflow.com/questions/5712100/interview-java-equals...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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359 views

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C++ Default argument for vector<int>&?

I have a function, void test( vector<int>& vec ); How can I set the default argument for vec ? ... :https://stackoverflow.com/questions/3147274/c-default-argument-for-vectorint...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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84 views

1 answer

How to implement "mustMatch" and "selectFirst" in jQuery UI Autocomplete?

I recently migrated a few of my Autocomplete plugins from the one produced by bassistance to the jQuery UI ... how-to-implement-mustmatch-and-selectfirst-in-jquery-ui-autocomplete...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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352 views

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templates - Django -- How to have a project wide templatetags shared among all my apps in that project

Second time asking more details ... I'd like to have a project wide templagetags directory to have the common tags ... -a-project-wide-templatetags-shared-among-all-my-apps-in-th...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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395 views

1 answer

ruby on rails - Gem update: unable to convert "xE7" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII

just ran gem update on a light use server machine that hadn't been updated in a while... and am getting loads of ' ... to-convert-xe7-to-utf-8-in-conversion-from-ascii-8bit-to-u...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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91 views

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How to handle exceptions with Ruby Rest-Client

I recently switched from Ruby's Net:HTTP class to rest-client 1.6.7. I find it a lot easier to ... .com/questions/11423068/how-to-handle-exceptions-with-ruby-rest-client...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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156 views

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referenceerror - How can I compare a non-existing JavaScript object to undefined without getting a Reference Error?

I want to boolean to come out of this expression (task === undefined); where task is arbitrary and doesn ... i-compare-a-non-existing-javascript-object-to-undefined-without-getting...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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310 views

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How do I capture a "response end" event in node.js+express?

I'd like to write an express middleware function that sets up a listener on the response's 'end' event, if one ... 11137648/how-do-i-capture-a-response-end-event-in-node-jsexpress...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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218 views

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testing - How to get the current URL after a redirect in a Symfony2 WebTestCase?

Using the Symfony2 WebTestCase, I have the following test : $client->request('GET', '/'); $this->assertTrue( ... get-the-current-url-after-a-redirect-in-a-symfony2-webtestcase...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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238 views

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modelbinders - ASP.NET MVC - Mixing Custom and Default Model Binding

I have a type: public class IssueForm { Order Order {get; set;} Item Item {get; set;} Range Range {get ... .com/questions/970335/asp-net-mvc-mixing-custom-and-default-model-binding...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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241 views

1 answer

Android Studio: how to see a list of all warnings?

If I change editor settings, I can see more warnings marked in yellow but I have to find and see them manually. ... /37438260/android-studio-how-to-see-a-list-of-all-warnings...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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776 views

1 answer

mercurial - How to resolve "abandoned transaction" when I use "hg push"?

We work with a sourceforge project. When we try to push, then mercurial abort : $ hg push pushing to ssh:/ ... /14218390/how-to-resolve-abandoned-transaction-when-i-use-hg-push...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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438 views

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Make portion of a text bold in a JavaFx Label or Text

In my JavaFx application I need to have a word or two rendered in boldface in the whole sentence. Currently the sentence ... make-portion-of-a-text-bold-in-a-javafx-label-or-text...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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235 views

1 answer

bash - Connect to sqlplus in a shell script and run SQL scripts

I have a .sql file, which is a bunch of oracle pl/sql commands and I want to create a shell script to run ... /10277983/connect-to-sqlplus-in-a-shell-script-and-run-sql-scripts...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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227 views

1 answer

How to set secret files to kubernetes secrets by yaml?

I want to store files in Kubernetes Secrets but I haven't found how to do it using a yaml file. I've ... /questions/36887946/how-to-set-secret-files-to-kubernetes-secrets-by-yaml...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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84 views

1 answer

How to create a dynamic function name using Elixir macro?

I want to create a function names dynamically. I wrote this macro defmacro generate_dynamic(name) do quote do def add_ ... /how-to-create-a-dynamic-function-name-using-elixir-macro...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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776 views

1 answer

parallel processing - multiprocessing.dummy in Python is not utilising 100% cpu

I am doing a machine learning project in Python, so I have to do parallel predict function, which I'm ... /26432411/multiprocessing-dummy-in-python-is-not-utilising-100-cpu...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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251 views

1 answer

Fixed gradient background with css

I would like for my page to have a gradient background flowing from top to bottom. I want the ... ://stackoverflow.com/questions/18094134/fixed-gradient-background-with-css...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

php - .htaccess RewriteRule to preserve GET URL parameters

I'm having issues keeping the parameters of the url working after an htaccess url rewrite. My htaccess ... /questions/4071155/htaccess-rewriterule-to-preserve-get-url-parameters...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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730 views

1 answer

java - Keycloak Missing form parameter: grant_type

I have keycloak standalone running on my local machine. I created new realm called 'spring-test', then ... .com/questions/53795179/keycloak-missing-form-parameter-grant-type...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

1 answer

typescript - Styles in component for D3.js do not show in angular 2

I am using Angular 2 and D3.js. I want to show a red rectangle. It only works if I put styles in the style.css ... /36214546/styles-in-component-for-d3-js-do-not-show-in-angular-2...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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160 views

1 answer

CSS selectors ul li a {...} vs ul > li > a {...}

What is the difference between ul > li > a {...} and ul li a {...} in CSS? Which one is more efficient ... ://stackoverflow.com/questions/11227322/css-selectors-ul-li-a-vs-ul-li-a...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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131 views

1 answer

html - In IndexedDB, is there a way to make a sorted compound query?

Say a table has, name, ID, age, sex, education, etc. ID is the key and the table is also indexed for name, ... /12084177/in-indexeddb-is-there-a-way-to-make-a-sorted-compound-query...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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245 views

1 answer

c# - How to fire a button click event from JavaScript in ASP.NET

How do I fire a server side button click event from JavaScript? I tried like this: document.getElementById("<%= ... -to-fire-a-button-click-event-from-javascript-in-asp-net...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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258 views

1 answer

Kotlin: "if item not in list" proper syntax

Given Kotlin's list lookup syntax, if (x in myList) as opposed to idiomatic Java, if (myList.contains(x)) ... .com/questions/43664110/kotlin-if-item-not-in-list-proper-syntax...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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274 views

1 answer

Change the Increment Value of HTML Number Input - Decimals

Is there any way to change how much a number is incremented when using the up/down arrows on a HTML ... questions/26003148/change-the-increment-value-of-html-number-input-decimals...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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134 views

1 answer

java - How can I run a Spring Boot application on port 80

I can't start an application on port 80. I have tried on my local computer (using my IDE, and on a local ... questions/33703965/how-can-i-run-a-spring-boot-application-on-port-80...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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