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How to do if-else in Thymeleaf?
What's the best way to do a simple if - else in Thymeleaf?
10 Answers
10
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Find an element in a list of tuples
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If you just want the first number to match you can do it like this:
[item for item in a if item[0] == 1]
If you are just searching for tuples with 1 in them:
[item for item in a if 1 in item]
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Return type of '?:' (ternary conditional operator)
...alue or an rvalue. This is its value category. (This is somewhat of a simplification, in C++11 we have lvalues, xvalues and prvalues.)
In very broad and simple terms, an lvalue refers to an object in memory and an rvalue is just a value that may not necessarily be attached to an object in memory.
An...
I want to remove double quotes from a String
...console.log(someStr.replace(/['"]+/g, ''));
That should do the trick... (if your goal is to replace all double quotes).
Here's how it works:
['"] is a character class, matches both single and double quotes. you can replace this with " to only match double quotes.
+: one or more quotes, chars, a...
Delete all but the most recent X files in bash
...d globbing.
inability to distinguish between files and directories (i.e., if directories happened to be among the 5 most recently modified filesystem items, you'd effectively retain fewer than 5 files, and applying rm to directories will fail).
wnoise's answer addresses these issues, but the solu...
SQLite - UPSERT *not* INSERT or REPLACE
...ddition to INSERT that causes the INSERT to behave as an UPDATE or a no-op if the INSERT would violate a uniqueness constraint. UPSERT is not standard SQL. UPSERT in SQLite follows the syntax established by PostgreSQL.
GOOD but tendous: This will update 2 of the columns.
When ID=1 exists, the NA...
How to detect the currently pressed key?
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if ((Control.ModifierKeys & Keys.Shift) != 0)
This will also be true if Ctrl+Shift is down. If you want to check whether Shift alone is pressed,
if (Control.ModifierKeys == Keys.Shift)
If you're in a class that inh...
Determine whether JSON is a JSONObject or JSONArray
...ich it will be. I need to work with the JSON, but to do so, I need to know if it is an Object or an Array.
8 Answers
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Javascript: best Singleton pattern [duplicate]
...rsion
class Singleton {
static instance;
constructor() {
if (instance) {
return instance;
}
this.instance = this;
}
foo() {
// ...
}
}
console.log(new Singleton() === new Singleton());
(2) ES6 Version
class Singleton {
const...
Correctly determine if date string is a valid date in that format
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If you are using PHP 5.2.x, you should use strtotime to get the unix timestamp then date('Y-m-d', $t) to get the string date. Then you compare them just like this answer.
– pedromanoel
J...