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Expression error – can’t find out what’s wrong with my syntax
Expressions question:
I’ve opened an old project in AE 16.1.1, and I get some expressions errors (as expected). I’ve fixed most of them, but five remain, and I don’t understand how I can fix them.
Here’s one of the expressions, and the error message. The syntax is very similar on the other four.
This code triggers an error on line 6: index 3 out of range for stream of dimension 1
txt = thisComp.layer("Source").text.sourceText;
i = Math.floor((txt.length-1)/2);
j = (txt.length%2) ? i : i+1;
n = -1;
while (i >= 0 && j < txt.length){
if (txt[i] == " "){
n = i;
break;
}else if (txt[j] == " "){
n = j;
break;
}
i--;
j++;
}
if (n < 0) txt; else txt.substr(0,n)Jarle Leirpoll
PremierePro.net -
6 Replies
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Change the first line to:
txt = thisComp.layer(“Source”).text.sourceText.value;
Dan
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Perfect! Works like a charm. I’m not surprised, though. ☺
Thanks Dan!Whenever you have the time, I’d like to understand why it’s now important to add “.value”
Jarle Leirpoll
PremierePro.net -
My guess is that sourceText is an object, not the actual text array–the legacy engine lets you get away with indexing it as an array but the new engine is more strict.
Dan
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Almost there! I’ve managed to split the text between words, and to adjust the split point with a slider. Works great, but the layer that grabs the second line starts with a space, not with a letter.
How can I strip away the space at the start?
Here’s the code for this layer.
txt = thisComp.layer("Source").text.sourceText.value;
nWords = Math.round(thisComp.layer("Controls").effect("Word Split")("Slider"));
if (nWords > 0){
count = 0;
for (i = 0; i < txt.length; i++){
if (txt[i] == " "){
count++;
if (count == nWords) break;
}
}
if (count < nWords) txt
else txt.substr(i,txt.length)
}else{
i = Math.floor(txt.length-1);
n = -1;
while (i >= 0){
if (txt[i] == " "){
n = i;
break;
}
i--;
j++;
}
if (n < 0) ""
else txt.substr(n+1)
}Jarle Leirpoll
PremierePro.net -
SOLVED!
I got help from Jonathan Beresford in a Facebook group. He suggested to use trim(), and that worked.
Here’s the final code. Hope it can help someone else.txt = comp("Subtitles 25 fps 1080x1920 With Line Break").layer("Source").text.sourceText.value;
nWords = Math.round(comp("Subtitles 25 fps 1080x1920 With Line Break").layer("Controls").effect("Word Split")("Slider"));
if (nWords > 0){
count = 0;
for (i = 0; i < txt.length; i++){
if (txt[i] == " "){
count++;
if (count == nWords) break;
}
}
if (count < nWords) txt
else txt.substr(i,txt.length).trimLeft()
}else{
i = Math.floor(txt.length-1);
n = -1;
while (i >= 0){
if (txt[i] == " "){
n = i;
break;
}
i--;
}
if (n < 0) ""
else txt.substr(n+1)
}Jarle Leirpoll
PremierePro.net
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