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String to Number

intermediate
String to Number
  • Overview
  • String to Number
  • Number to String

In this tutorial, you will learn how to convert a numerical string into a number and a number into a text string.

Overview ​

There are many instances that a text string will be passed into the UI, be it through a title, actionbar, scoreboard, or some other source. When we wish to dynamically change elements based off the string that was passed in, it is very helpful to be able to do numerical comparisons. However, numerical strings such as "34" or "89" will normally be treated as text and cannot be compared to a number, only other strings. In this case, we'll need to convert that string to a number.

To convert the string to a number, we will utilize multiplication. Multiplying any numerical string by a number, or stripping the text from a string containing a number, will cause the game to read that value as a number instead of a string.

String to Number ​

The following code creates a label element that, when added to the root panel, displays the highest value in the scoreboard sidebar if that number is between 100-999.

RP/ui/hud_screen.json
json
"string_to_number": {
    "type": "label",
    "text": "#player_score_sidebar",
    "bindings": [
        {
            "binding_name": "#player_score_sidebar",
            "binding_type": "collection",
            "binding_collection_name": "scoreboard_scores"
        },
        {
            "binding_type": "view",
            "source_property_name": "(#player_score_sidebar * 1)",   // convert score from string to number
            "target_property_name": "#score"
        },
        {
            "binding_type": "view",
            "source_property_name": "((#score > 99) and (#score < 1000))",   // visible between 100-999
            "target_property_name": "#visible"
        }
    ]
}
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The first binding reads the top value in the scoreboard sidebar (the binding is hardcoded as a string), the second binding converts that score to a number by multiplying it by 1 (can also subtract any text string from it), and the third binding makes the element visible only when the score is greater than 99 or less than 1000.

Note: if you want the number to read as a float instead of an integer, pass a variable or binding into the equation which uses a float, such as dividing by 1.0 (it must be through a variable or binding--placing the float number directly does not work). This is especially useful for the #clip-ratio binding.

Number to String ​

The following code creates a label element that, when added to the root panel, displays the number # when passing in a title formatted "strength: #".

RP/ui/hud_screen.json
json
"number_to_string": {
	"type": "label",
	"text": "#text",
	"bindings": [
		{
			"binding_type": "global",
			"binding_name": "#hud_title_text_string"
		},
		{
			"binding_type": "view",
			"source_property_name": "('§z' + (#hud_title_text_string - 'strength: '))",
			"target_property_name": "#text"
		}
	]
}
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In the case when using a title, subtitle, etc. to pass in text in combination with a number, this method will allow you to display just the number. After subtracting out the excess text to strip the string down to its number, text is added before the number to convert the value to a string (the text parameter cannot read a binding with a numerical value). In this case, the parentheses are not needed around the subtraction but exist to show that it converts the number rather than simply maintains it as a string. The text added, §z, is a non-existent Minecraft formatting code so that it doesn't register in the display of the number and does not affect the label's color parameter. If visible text exists around the number which cannot all be subtracted out, a good method to remove it from the display is to wrap the element in a panel with "clips_children": true and appropriate sizing.

Contributors

Edit String to Number on GitHub

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