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What is the lifetime of a static variable in a C++ function?
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264
The lifetime of function static variables begins the first time[0] the program flow encounters...
How can I get the list of a columns in a table for a SQLite database?
...ress varchar);
sqlite> select * from sqlite_master;
table|people|people|2|CREATE TABLE people (first_name varchar, last_name varchar, email_address varchar)
To get column information you can use the pragma table_info(table_name) statement:
sqlite> pragma table_info(people);
0|first_name|var...
Hide the cursor of an UITextField
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279
Simply subclass UITextField and override caretRectForPosition
- (CGRect)caretRectForPosition:...
How to solve error “Missing `secret_key_base` for 'production' environment” (Rails 4.1)
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208
I had the same problem and solved it by creating an environment variable to be loaded every ti...
Depend on a branch or tag using a git URL in a package.json?
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edited Oct 24 '18 at 22:19
Steve Bennett
76.4k2424 gold badges119119 silver badges165165 bronze badges
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How to count occurrences of a column value efficiently in SQL?
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263
This should work:
SELECT age, count(age)
FROM Students
GROUP by age
If you need the id...
Why do python lists have pop() but not push()
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Because "append" existed long before "pop" was thought of. Python 0.9.1 supported list.append ...
How to uninstall editable packages with pip (installed with -e)
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At {virtualenv}/lib/python2.7/site-packages/ (if not using virtualenv then {system_dir}/lib/python2.7/dist-packages/)
remove the egg file (e.g. distribute-0.6.34-py2.7.egg) if there is any
from file easy-install.pth, remove the corresponding line (i...
Default height for section header in UITableView
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205
In IOS 5.0 onwards you can return UITableViewAutomaticDimension in most of the delegate method...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...eated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break dependencies all the time. Without this behaviour, every single 32-bit instruction in 64-bit mode would have to wait on something that happened before, even thoug...