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How to create directories recursively in ruby?
I want to store a file as /a/b/c/d.txt, but I do not know if any of these directories exist and need to recursively create them if necessary.
How can one do this in ruby?
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How to get the current time in YYYY-MM-DD HH:MI:Sec.Millisecond format in Java?
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Using Java 8 datetime API: LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS"))
– rsinha
Dec 14 '17 at 19:41
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Referencing another schema in Mongoose
if I have two schemas like:
3 Answers
3
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How to replace all occurrences of a character in string?
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std::string is a container specifically designed to operate with sequences of characters. link
– Kirill V. Lyadvinsky
May 24 '10 at 11:41
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Android Fragments and animation
...eate a Fragment Transaction.
Within each Fragment Transaction you can specify in and out animations that will be used for show and hide respectively (or both when replace is used).
The following code shows how you would replace a fragment by sliding out one fragment and sliding the other one in i...
Automatic creation date for Django model form objects?
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You can use the auto_now and auto_now_add options for updated_at and created_at respectively.
class MyModel(models.Model):
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
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psql: FATAL: Ident authentication failed for user “postgres”
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If you set PGHOST=localhost you don't need to specify the -h option every time. This also works with other pg_* commands such as pg_dump.
– Sameer
Aug 31 '12 at 18:39
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Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...am):
while(!inStream.eof()){
int data;
// yay, not end of stream yet, now read ...
inStream >> data;
// oh crap, now we read the end and *only* now the eof bit will be set (as well as the fail bit)
// do stuff with (now uninitialized) data
}
Against this:
int data;
while(inStream...
离线版启动超时，有报错日志 - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
web服务启动报错：
Picked up JAVA_TOOL_OPTIONS: "-Dfile.encoding=UTF-8"
Executing [D:\appinventor\AppInventor2\resources\app.asar.unpacked\OpenJDK\bin\java, --add-opens=java.base/java.lang=ALL-UNNAMED, -Xmx4G, --add-opens, java.base/java.net=ALL-UNNAMED, --add-opens, java.base/sun.ne...
What is the difference between SIGSTOP and SIGTSTP?
Just wondering about the difference between SIGSTOP and SIGTSTP signals.
3 Answers
3...