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File Hash 扩展：文件哈希计算和 Base64 编码文件，sha256、sha512 哈希 ·...
...《服务协议》 关注公众号，精彩不错过！ #free_v { border:none; position:fixed; top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
git ahead/behind info between master and branch?
...behind locally, you should do a git fetch to make sure you have the latest info from your remote.
The default output of git status tells you how many revisions you are ahead or behind, but usually I find this too verbose:
$ git status
# On branch master
# Your branch and 'origin/master' have diver...
Do you (really) write exception safe code? [closed]
...even be sure, that it is?
Writing exception-safe code is like writing bug-free code.
You can't be 100% sure your code is exception safe. But then, you strive for it, using well-known patterns, and avoiding well-known anti-patterns.
Do you know and/or actually use alternatives that work?
There are...
How do I check (at runtime) if one class is a subclass of another?
...
issubclass(class, classinfo)
Excerpt:
Return true if class is a subclass (direct, indirect or virtual) of
classinfo.
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Detect application heap size in Android
... your app currently uses:
long usedMemory=runtime.totalMemory() - runtime.freeMemory();
Getting how much of the heap your app can now use (available memory) :
long availableMemory=maxMemory-usedMemory;
And, to format each of them nicely, you can use:
String formattedMemorySize=Formatter.forma...
How can we match a^n b^n with Java regex?
... we anticipate having a more complicated pattern, let's use x modifier for free-spacing so we can make our regex more readable.
Building on our previous PHP snippet, we now have the following pattern:
$r2 = '/ ^ a+ (?= (b+) ) /x';
# │ └──┘ │
# │ 1 │
# ...
MediaHelper 媒体助手扩展：从媒体文件提取元数据和专辑封面 · App Inventor 2 中文网
...《服务协议》 关注公众号，精彩不错过！ #free_v { border:none; position:fixed; top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
Facebook Android Generate Key Hash
... super.onCreate(savedInstanceState);
try {
PackageInfo info = getPackageManager().getPackageInfo(
"com.facebook.samples.loginhowto",
PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
...
What's the difference between equal?, eql?, ===, and ==?
...t returns true when there is no match and false if there is a match.
More info is available at this blog post.
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Failed to allocate memory: 8
...he same issue with this. I have 8GB of RAM on my machine, with 6GB sitting free while the Android emulator tells me that it can't allocate 1GB?
– Strozykowski
Nov 11 '11 at 1:38
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