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Get keys from HashMap in Java
...out.println(team1.keySet().toArray()[0]);
keySet() returns a set, so you convert the set to an array.
The problem, of course, is that a set doesn't promise to keep your order. If you only have one item in your HashMap, you're good, but if you have more than that, it's best to loop over the map...
Jackson with JSON: Unrecognized field, not marked as ignorable
I need to convert a certain JSON string to a Java object. I am using Jackson for JSON handling. I have no control over the input JSON (I read from a web service). This is my input JSON:
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What is a elegant way in Ruby to tell if a variable is a Hash or an Array?
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@Brandon second example should convert the class to string.<br/>["Hash", "Array"].include?(@some_var.class.to_s) #=> check both through instance class
– OBCENEIKON
Jun 5 '15 at 16:27
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Change the current directory from a Bash script
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You need to convert your script to a shell function:
#!/bin/bash
#
# this script should not be run directly,
# instead you need to source it from your .bashrc,
# by adding this line:
# . ~/bin/myprog.sh
#
function myprog() {
A=$1
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How do I check if a property exists on a dynamic anonymous type in c#?
... Great solution. I needed to add one more IF statement when converting JSON string into JObject...."if (obj is Newtonsoft.Json.Linq.JObject) return ((Newtonsoft.Json.Linq.JObject)obj).ContainsKey(name);"
– rr789
Jul 3 '19 at 23:09
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Is Random class thread safe?
Is it valid to share one instance of the Random class between multiple threads? And to call nextInt(int) from multiple threads in particular?
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combinations between two lists?
...t I want, but is it possible to share the logic behind how to do it? If I convert my code to C or Java, I won't have access to zip or itertools(although they make life very very easy)
– user1735075
Oct 17 '12 at 13:39
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How do I check for a network connection?
... This doesn't always work in WPF. Some laptops return false and some return true
– krilovich
Feb 10 '16 at 17:21
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How do you check that a number is NaN in JavaScript?
...bove cases" I wouldn't say wrong, just different, because the global isNaN converts the argument to a number value first.
– Felix Kling
Mar 7 '16 at 7:23
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jQuery How to Get Element's Margin and Padding?
...r. It appends the units ('px'), but you can nevertheless use parseInt() to convert them to integers (or parseFloat(), for where fractions of pixels make sense).
http://jsfiddle.net/BXnXJ/
$(document).ready(function () {
var $h1 = $('h1');
console.log($h1);
$h1.after($('<div>P...