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7个App Inventor 2文件操作实用技巧，读写文件从未如此顺手 - App应用开发 ...
...目录剩余空间——FileTools 拓展就是你的瑞士军刀。
从 fun123.cn 下载 com.sunny.FileTools.aix 拓展文件，导入后即可使用。几个特别实用的方法：
• GetFreeSpace：查询目录可用空间（字节），存大文件前先判一判，防写入失败
• Asyn...
Getting one value from a tuple
...o a list
first_val = my_tuple[0]
second_val = my_tuple[1]
# if you have a function called my_tuple_fun that returns a tuple,
# you might want to do this
my_tuple_fun()[0]
my_tuple_fun()[1]
# or this
v1, v2 = my_tuple_fun()
Hope this clears things up further for those that need it.
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How to create EditText with cross(x) button at end of it?
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This is a kotlin solution. Put this helper method in some kotlin file-
fun EditText.setupClearButtonWithAction() {
addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(editable: Editable?) {
val clearIcon = if (editable?.isNotEmpty() == true) R.dra...
How to search a specific value in all tables (PostgreSQL)?
...red Apr 12 '14 at 21:37
Daniel VéritéDaniel Vérité
46.6k1313 gold badges102102 silver badges123123 bronze badges
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HTML5 Canvas vs. SVG vs. div
What is the best approach for creating elements on the fly and being able to move them around? For example, let's say I want to create a rectangle, circle and polygon and then select those objects and move them around.
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Remove Server Response Header IIS7
...t to check how it write down those config nodes.
– Frédéric
Sep 4 '15 at 19:31
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show 2 more comments
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How to determine day of week by passing specific date?
...de for abbreviation of day-of-week name. See Joda-Time doc.
String outputQuébécois = formatterOutput.withLocale( Locale.CANADA_FRENCH ).print( localDate );
Dump
Dump to console.
System.out.println( "input: " + input );
System.out.println( "localDate: " + localDate ); // Defaults to ISO 8601 fo...
Calling a method every x minutes
...t unnecessary bloat; however, you reverted it.
– André C. Andersen
Feb 5 '14 at 23:09
2
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Prevent Caching in ASP.NET MVC for specific actions using an attribute
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@Frédéric, the section of the spec you point to says that caches cannot cache no-store content: The "no-store" response directive indicates that a cache MUST NOT store any part of either the immediate request or response.
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How to Create a circular progressbar in Android which rotates on it?
...e var centerY: Float = 0f
private var radius: Float = 0f
override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
centerX = w.toFloat() / 2
centerY = h.toFloat() / 2
radius = w.toFloat() / 2 - progressWidth
oval.set(centerX - radius,
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