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Logging in Scala
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answered Jun 10 '09 at 21:32
Eugene YokotaEugene Yokota
88.3k4242 gold badges201201 silver badges296296 bronze badges
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App Inventor 2 人脸识别App开发 - 第三方API接入的通用方法 · App Inventor 2 中文网
...组件调用第三方API，代码如下：
注：这里图片采用Base64的方式，压缩后进行Base64编码。用到 SimpleBase64 拓展 和 TaifunImage 拓展。
JSON结果的解析
aia源码
通过上面的步骤拆解及代码块参考，相信你一定能够完成基本功能的开...
Gradle finds wrong JAVA_HOME even though it's correctly set
...urns out that the particular Gradle binary I downloaded from the Ubuntu 13.10 repository itself tries to export JAVA_HOME. Thanks to Lucas for suggesting this.
/usr/bin/gradle line 70:
export JAVA_HOME=/usr/lib/jvm/default-java
Commenting this line out solves the problem, and Gradle finds the co...
How to get correct timestamp in C#
...x time, but windows filetime.
From the docs:
A Windows file time is a 64-bit value that represents the number of 100-
nanosecond intervals that have elapsed since 12:00 midnight, January 1, 1601
A.D. (C.E.) Coordinated Universal Time (UTC).
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How to convert an enum type variable to a string?
...tring function as an operator<< overload instead, but I think it's a bit cleaner to require an explicit "ToString" to convert the value to string form.
As a usage example, your OS_type enumeration would be defined as follows:
DEFINE_ENUM_WITH_STRING_CONVERSIONS(OS_type, (Linux)(Apple)(Window...
Selecting multiple columns in a pandas dataframe
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Yes this was implicit in my answer. The bit about the copy was only for use of ix[] if you prefer to use ix[] for any reason.
– ely
Jul 8 '12 at 18:09
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Null coalescing in powershell
... "" $otherval
As you can see a very simple function can give you quite a bit of freedom of syntax.
UPDATE: One extra option to consider in the mix is a more generic IsTrue function:
function IfTrue($a, $b, $c) { if ($a) { $b } else { $c } }
$x = IfTrue ($myval -eq $null) "" $otherval
Then com...
Parsing query strings on Android
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edited Jun 9 at 10:55
answered Dec 2 '15 at 10:22
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Difference between volatile and synchronized in Java
...on some (older) hardware this might require locks, though not on modern 64 bit hardware. Under the new (JSR-133) memory model for Java 5+, the semantics of volatile have been strengthened to be almost as strong as synchronized with respect to memory visibility and instruction ordering (see http://ww...
What is %2C in a URL?
.... | 4E | N | 6E | n |
| 0F | SI | 2F | / | 4F | O | 6F | o |
| 10 | DLE | 30 | 0 | 50 | P | 70 | p |
| 11 | DC1 | 31 | 1 | 51 | Q | 71 | q |
| 12 | DC2 | 32 | 2 | 52 | R | 72 | r |
| 13 | DC3 | 33 | 3 | 53 | S | 73 | s |
| 14 | DC4 | 34 | 4 | 54 | T | 74 | t ...