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How to count items in JSON object using command line?
...uppose it was in a property called records, like {"records":[...]}.
$ curl https://my-source-of-json.com/list | jq -r '.records' | jq length
2
$
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Default text which won't be shown in drop-down list
...lt;/option>
</select>
"Select language" will show up in the dropdown, but once another option is selected it will not be possible to reselect it.
I hope that helps.
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How to find indices of all occurrences of one string in another in JavaScript?
...answered Aug 4 '10 at 23:05
Tim DownTim Down
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Modelling an elevator using Object-Oriented Analysis and Design [closed]
...
First there is an elevator class. It has a direction (up, down, stand, maintenance), a current floor and a list of floor requests sorted in the direction. It receives request from this elevator.
Then there is a bank. It contains the elevators and receives the requests from the floo...
Run task only if host does not belong to a group
... not in group_names"
group_names is a magic variable as documented here: https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#accessing-information-about-other-hosts-with-magic-variables :
group_names is a list (array) of all the groups the current host is in.
...
Performance optimization strategies of last resort [closed]
...f the time. Those were replaced with fairly simple code, bringing the time down to 20 seconds.
Now the largest time-taker is more list-building. As a percentage, it was not so big before, but now it is because the bigger problem was removed. I find a way to speed it up, and the time drops to 17 seco...
IntelliJ IDEA with Junit 4.7 “!!! JUnit version 3.8 or later expected:”
...n Run/Debug Configurations
Make sure you follow the instruction properly https://developer.android.com/training/testing/unit-testing/instrumented-unit-tests.html
Make sure Test Artifact in Build Variants is set to Android Instrumentation Tests
Click menu Run > Edit Configuration
Make sure your ...
Automatic text translation at MSDN pages - How to turn off?
...ersion of the current MSDN doc page
// @grant none
// @match https://docs.microsoft.com/*
// ==/UserScript==
(function () {
let pathname = window.location.pathname.split('/');
if (pathname[1].toLowerCase() !== 'en-us') {
pathname[1] = 'en-us';
pathname = pathna...
variable === undefined vs. typeof variable === “undefined”
...nswered Jan 18 '11 at 16:05
Tim DownTim Down
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Write a program that will surely go into deadlock [closed]
... the reader #2: demonstrate the same deadlock in Java. (An answer is here: https://stackoverflow.com/a/9286697/88656)
class MyClass
{
static MyClass()
{
// Let's run the initialization on another thread!
var thread = new System.Threading.Thread(Initialize);
thread.Start();
thre...