How to slice array in Arcade?

Zeke

I have an Arcade expression that I want to use for labeling. If the label field (named Label) is two words or less, I return the field. This works fine. But if the Label is more than two words, it should return the first two words, followed by a newline, then the rest of the words. In Python, this would be something like lbl_array[:2] + '\n' + lbl_array[2:]. But I can't figure out or find how to slice Arcade array elements like that. I could use a for loop to construct the label, but there should be a way to use the indexes.

var lbl = $feature["Label"]

var lbl_array = Split(lbl, ' ')

if (count(lbl_array) < 3) {

    return lbl }

else {

?? }

XanderBakker

Hi Greg Keith ,

You can use the code below, but since you mention that you are creating labels, you will not be able to use the NewLine constant. This will be supported when the new web map based on JavaScript API 4.x becomes available this fall:

<SPAN class="keyword token">var</SPAN> txt <SPAN class="operator token">=</SPAN> <SPAN class="string token">"aaaa bb ccc d"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> arr <SPAN class="operator token">=</SPAN> <SPAN class="token function">Split</SPAN><SPAN class="punctuation token">(</SPAN>txt<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">" "</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="token function">Count</SPAN><SPAN class="punctuation token">(</SPAN>arr<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">></SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">var</SPAN> arr_new <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>arr<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN> arr<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> result <SPAN class="operator token">=</SPAN> <SPAN class="token function">Concatenate</SPAN><SPAN class="punctuation token">(</SPAN>arr_new<SPAN class="punctuation token">,</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="comment token">//var result = arr[0] + TextFormatting.NewLine + arr[1];</SPAN>
<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">var</SPAN> result <SPAN class="operator token">=</SPAN> txt<SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

<SPAN class="keyword token">return</SPAN> result<SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>