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Numpy index slice without losing dimension information
...y an array that might be length 1 at runtime. For that case, there's np.ix_:
some_array[np.ix_(row_index,column_index)]
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Can not connect to local PostgreSQL
... the permissions on the socket file and its directories /var and /var/pgsql_socket. Your Rails app (OSX user) must have execute (x) permissions on these directories (preferably grant everyone permissions) and the socket should have full permissions (wrx). You can use ls -lAd <file> to check t...
Signed to unsigned conversion in C - is it always safe?
...hort Answer
Your i will be converted to an unsigned integer by adding UINT_MAX + 1, then the addition will be carried out with the unsigned values, resulting in a large result (depending on the values of u and i).
Long Answer
According to the C99 Standard:
6.3.1.8 Usual arithmetic conversions...
push_back vs emplace_back
I'm a bit confused regarding the difference between push_back and emplace_back .
7 Answers
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pdf2htmlEX实现pdf转html - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...ll', function() {
<span style="white-space:pre"> </span>self.update_page_idx();
<span style="white-space:pre"> </span>self.schedule_render(true);
<span style="white-space:pre"> </span>}, false);
*/
/*新增，使用document对象上滚动加载页面数据，这样可以兼容...
Android Center text on canvas
... at the center position: int xPos = (Width - textPaint.TextSize * Math.Abs(_text.Length / 2)) / 2; Not sure if there's a better way to accomplish this.
– paj7777
Apr 8 '13 at 9:06
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What is the “right” way to iterate through an array in Ruby?
...nts giving you the value and the index:
array = ["A", "B", "C"]
array.each_with_index {|val, index| puts "#{val} => #{index}" }
Prints:
A => 0
B => 1
C => 2
I'm not quite sure from your question which one you are looking for.
...
Git command to show which specific files are ignored by .gitignore
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git ls-files -i
should work, except its source code indicates:
if (show_ignored && !exc_given) {
fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
argv[0]);
exc_given ?
It turns out it need one more parameter after the -i to actually...
How to handle invalid SSL certificates with Apache HttpClient? [duplicate]
...n help you. Please download the Java
program and run
% java InstallCert _web_site_hostname_
This program opened a connection to
the specified host and started an SSL
handshake. It printed the exception
stack trace of the error that occured
and shows you the certificates used by
th...
What's the difference between a catalog and a schema in a relational database?
I used to think schema were the "upper wrapper" object before the database itself.
I mean DB.schema.<what_ever_object_name_under_schema> .
...