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How to test if a string is JSON or not?
... @Zalaboza 1234, 0, false, and null are all valid JSON values. If you want a predicate that tests if the JSON represents an object you'll need to do a little more.
– Michael Lang
Nov 18 '15 at 23:15
...
Using the HTML5 “required” attribute for a group of checkboxes?
...-of-the-box way to do that.
However, using jQuery, you can easily control if a checkbox group has at least one checked element.
Consider the following DOM snippet:
<div class="checkbox-group required">
<input type="checkbox" name="checkbox_name[]">
<input type="checkbox" na...
How to remove duplicate white spaces in string using Java?
...
replace it with $1.
Java code:
str = str.replaceAll("(\\s)\\1","$1");
If the input is "foo\t\tbar " you'll get "foo\tbar " as outputBut if the input is "foo\t bar" it will remain unchanged because it does not have any consecutive whitespace characters.
If you treat all the whitespace characte...
Convert Float to Int in Swift
I want to convert a Float to an Int in Swift. Basic casting like this does not work because these types are not primitives, unlike float s and int s in Objective-C
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contenteditable, set caret at the end of the text (cross-browser)
... major browsers:
function placeCaretAtEnd(el) {
el.focus();
if (typeof window.getSelection != "undefined"
&& typeof document.createRange != "undefined") {
var range = document.createRange();
range.selectNodeContents(el);
range.collapse(f...
How to redirect single url in nginx?
...ss of reorganizing url structure.
I need to setup redirect rules for specific urls - I'm using NGINX.
3 Answers
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Java - JPA - @Version annotation
...ENTITY SET ..., VERSION = VERSION + 1 WHERE ((ID = ?) AND (VERSION = ?))
If the WHERE clause fails to match a record (because the same entity has already been updated by another thread), then the persistence provider will throw an OptimisticLockException.
Does it mean that we should declare ou...
Trim a string based on the string length
I want to trim a string if the length exceeds 10 characters.
11 Answers
11
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Parse email content from quoted reply
.... I'll break it up into those two categories:
When you have the thread:
If you have the entire series of emails, you can achieve a very high level of assurance that what you are removing is actually quoted text. There are two ways to do this. One, you could use the message's Message-ID, In-Repl...
Can I store the .git folder outside the files I want tracked?
...
This will do what you want but will obviously suck when you have to specify it with every git command you ever use.
You can export GIT_WORK_TREE=. and GIT_DIR=../backup and Git will pick them up on each command. That will only comfortably allow you to work in a single repository per shell, thoug...