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在 App Inventor 2 中使用图像 · App Inventor 2 中文网
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Django ModelForm: What is save(commit=False) used for?
...easheet"
if attachment.filename.lower().endswith(('.doc','.pdf','.rtf','.txt')):
attachment.file_type = "text"
attachment.save()
here is my example of using save(commit=False). I wanted to check what type of file a user uploaded before saving it ...
Android - Spacing between CheckBox and text
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72
Use attribute android:drawableLeft instead of android:button. In order to set padding between d...
How to render and append sub-views in Backbone.js
... is example code lifted from Recipes With Backbone, found on page 42 of my PDF edition:
...
render: function() {
$(this.el).html(this.template());
this.addAll();
return this;
},
addAll: function() {
this.collection.each(this.addOne);
},
addOne: function(model) {
view = new V...
See what process is using a file in Mac OS X
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lsof | grep myfilename worked for me. I've got a PDF file in my Trash that the system claims is in use. Weirdly lsof claims it's in use by Preview but Preview doesn't seem to be running (eg when I command-tab through the running apps) but Activity Monitor does show it to b...
Which equals operator (== vs ===) should be used in JavaScript comparisons?
...n tremendously. It is an acquired skill. So, let's continue.
Searching the PDF file for === brings me to page 56 of the specification: 11.9.4. The Strict Equals Operator ( === ), and after wading through the specificationalese I find:
11.9.6 The Strict Equality Comparison Algorithm
The comparison x...
App Inventor 2 LLMAI2Ext 自研拓展：接入DeepSeek、Kimi、通义千问...等国...
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DeepSeek
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事件
方法
Kimi
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阿里通义千问
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Detect all changes to a (immediately) using JQuery
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72
Am I wrong or this does not handle when text changed via javascript like document.getElementById('txtInput').value = 'some text';
...
How to detect which one of the defined font was used in a web page?
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72
I've seen it done in a kind of iffy, but pretty reliable way. Basically, an element is set to u...
Creating a new empty branch for a new project
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72
The correct answer is to create an orphan branch. I explain how to do this in detail on my blog...