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Why was the switch statement designed to need a break?
...ors
that can have either one or two
operands:
switch (operator->num_of_operands) {
case 2: process_operand( operator->operand_2);
/* FALLTHRU */
case 1: process_operand( operator->operand_1);
break;
}
Case fall through is so widely
recognized as a def...
How do I deep copy a DateTime object?
...t, but deep enough for a DateTime. In your own objects, you can define the __clone() magic method to clone the properties (i.e. child objects) that make sense to be cloned when the parent object changes.
(I'm not sure why the documentation thinks a good example of needing to clone an object is GTK....
Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification
...ur browser and add it to cacerts file of your JVM. You can either edit JAVA_HOME/jre/lib/security/cacerts file or run you application with -Djavax.net.ssl.trustStore parameter. Verify which JDK/JRE you are using too as this is often a source of confusion.
See also: How are SSL certificate server na...
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...
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> .
...
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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