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How to delete images from a private docker registry?
...Docker-Content-Digest part should be in lowercase (tested on docker engine v18.09.2) i.e. curl -v --silent -H "Accept: application/vnd.docker.distribution.manifest.v2+json" -X GET http://localhost:5000/v2/<name>/manifests/<tag> 2>&1 | grep docker-content-digest | awk '{print ($3)...
numpy: most efficient frequency counts for unique values in an array
...arison with scipy.stats.itemfreq:
In [4]: x = np.random.random_integers(0,100,1e6)
In [5]: %timeit unique, counts = np.unique(x, return_counts=True)
10 loops, best of 3: 31.5 ms per loop
In [6]: %timeit scipy.stats.itemfreq(x)
10 loops, best of 3: 170 ms per loop
...
jQuery AJAX cross domain
...{
url: "http://localhost/getxml.php",
data: { "id":"doc1", "rows":"100" },
type: "GET",
timeout: 30000,
dataType: "text", // "xml", "json"
success: function(data) {
// show text reply as-is (debug)
alert(data);
// show xml field values (debug)
...
Pass variables to Ruby script via command line
... do|a|
puts "Argument: #{a}"
end
then
$ ./test.rb "test1 test2"
or
v1 = ARGV[0]
v2 = ARGV[1]
puts v1 #prints test1
puts v2 #prints test2
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STL 算法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...序列范围内的可以插入指定值而不破坏容器顺序的第一个位置.重载函数使用自定义比较操作
函数原形
template<class FwdIt, class T> FwdIt lower_bound(FwdIt first, FwdIt last, const T& val);
template<class FwdIt, class T, class Pred> FwdIt lower_bou...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...页面空间。 Small对象被分到一起， metadata信息存放在起始位置。 large chunk相互独立，它的metadata信息存放在chunk header map中。
通过arena分配的时候需要对arena bin（每个small size-class一个，细粒度）加锁，或arena本身加锁。
并且线...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...中View的当前属性状态；右下角显示当前View在Activity中的位置等；左下角三个进行切换；Load View Hierarchy用来手动刷新变化（不会自动刷新的）。当我们选择一个View后会如下图所示：
类似上图可以很方便的查看到当前View的许多...
Is there any publicly accessible JSON data source to test with real world data? [closed]
... with OAUTH requirements...
{"errors": [{"message": "The Twitter REST API v1 is no longer active. Please migrate to API v1.1. https://dev.twitter.com/docs/api/1.1/overview.", "code": 68}]}
Replacing it with a simple example of the Github API - that returns a tree, of in this case, my repositories...
如何抓住痛点做出让用户尖叫的产品 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...张图片，此时可以选这图片，也可以继续选择发送表情、位置等其他内容，几秒后不选择，提示就会消失，整体上不影响操作流程，却在体验上提升了很多。
第三，要真正理解用户的痛点，以痛点为中心去设计优化产品。这...
How to use the C socket API in C++ on z/OS
...
Keep a copy of the IBM manuals handy:
z/OS V1R11.0 XL C/C++ Programming Guide
z/OS V1R11.0 XL C/C++ Run-Time Library Reference
The IBM publications are generally very good, but you need to get used to their format, as well as knowing where to look for an answer...