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Using python “with” statement with try-except block
...nt
The code you described as old way
of doing things has a serious bug:
in case opening the file fails you
will get a second exception in the
finally clause because f is not
bound.
The equivalent old style code would be:
try:
f = open("file", "r")
try:
line = f.readline()
fina...
PostgreSQL: Can you create an index in the CREATE TABLE definition?
...primary keys by default, as described in this note:
PostgreSQL automatically creates an index for each unique constraint and primary key constraint to enforce uniqueness.
Other than that, if you want a non-unique index, you will need to create it yourself in a separate CREATE INDEX query.
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How to copy from current position to the end of line in vi
... of line in vi and paste it in another file opened in vi. I googled it but cant find any solution for this. Appreciate any help on this. Thank you.
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creating a random number using MYSQL
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This should give what you want:
FLOOR(RAND() * 401) + 100
Generically, FLOOR(RAND() * (<max> - <min> + 1)) + <min> generates a number between <min> and <max> inclusive.
Update
This full statement should work:
SELECT name, address, FLOOR(RAND() * 401) + 100...
Iterate through the fields of a struct in Go
Basically, the only way (that I know of) to iterate through the values of the fields of a struct is like this:
3 Answers
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Python Requests library redirect new url
I've been looking through the Python Requests documentation but I cannot see any functionality for what I am trying to achieve.
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UITableView + Add content offset at top
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I'm not sure if I'm following you but I think I'm having the same predicament. In my case I must give some space to the ADBannerView at the top of the screen so what I did was in the viewDidLoad method I added:
[self.tableView setContentInset:UIEdgeInsetsMake(50,0,0,0)];
the values it takes a...
How to get the list of all printers in computer
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If you need more information than just the name of the printer you can use the System.Management API to query them:
var printerQuery = new ManagementObjectSearcher("SELECT * from Win32_Printer");
foreach (var printer in printerQuery.Get())
{
var name = printer.GetPropertyValue("Name");
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Find and replace string values in list
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words = [w.replace('[br]', '<br />') for w in words]
These are called List Comprehensions.
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How do you clone a BufferedImage
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copyData(null) does not always work because it may work on a parent raster (ie. when the image is a sub image), see my modified answer
– user1050755
Nov 12 '14 at 19:21
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