#string-formatting

How to: Why does this assert throw a format exception when comparing structures?

Why does this assert throw a format exception when comparing structures?

I’m trying to assert the equality of two System.Drawing.Size structures, and I’m getting a format exception instead of the expected assert failure.

[TestMethod] public void AssertStructs() { var struct1 = new Size(0, 0); var struct2 = new Size(1, 1); //This throws a format exception, "System.FormatException: Input string…

Fixed Display number with leading zeros #dev #it #asnwer

Display number with leading zeros

Given:

a = 1 b = 10 c = 100

I want to display a leading zero for all numbers with less than 2 digits, i.e.:

01 10 100

Answer: Display number with leading zeros

x = [1, 10, 100] for i in x: print '%02d' % i

results:

01 10 100

Read more information about string formatting using % in the documentation.

Answer: Display number with leading zeros

Here you are:

pr…

How to: Warning: "format not a string literal and no format arguments"

Warning: "format not a string literal and no format arguments"

Since upgrading to the latest Xcode 3.2.1 and Snow Leopard, I’ve been getting the warning

“format not a string literal and no format arguments”

from the following code:

NSError *error = nil; if (![self.managedObjectContext save:&error]) { NSLog([NSString stringWithFormat:@"%@ %@, %@", errorMsgFormat, error, [error userInfo]]); }

If

How to: Named string formatting in C#

Named string formatting in C#

Is there any way to format a string by name rather than position in C#?

In python, I can do something like this example (shamelessly stolen from here):

>>> print '%(language)s has %(#)03d quote types.' % \ {'language': "Python", "#": 2} Python has 002 quote types.

Is there any way to do this in C#? Say for instance:

String.Format("{some_variable}:…

How to: Should I use Java's String.format() if performance is important?

Should I use Java’s String.format() if performance is important?

We have to build Strings all the time for log output and so on. Over the JDK versions we have learned when to use StringBuffer (many appends, thread safe) and StringBuilder (many appends, non-thread-safe).

What’s the advice on using String.format()? Is it efficient, or are we forced to stick with concatenation for one-liners where…

Fixed Python string formatting: % vs. .format #dev #it #asnwer

Python string formatting: % vs. .format

Python 2.6 introduced the str.format() method with a slightly different syntax from the existing % operator. Which is better and for what situations?

The following uses each method and has the same outcome, so what is the difference?

#!/usr/bin/python sub1 = "python string!" sub2 = "an arg" a = "i am a %s" % sub1 b = "i am a {0}".format(sub1) c = "with…

How to: Display number with leading zeros

Display number with leading zeros

Given:

a = 1 b = 10 c = 100

I want to display a leading zero for all numbers with less than 2 digits, i.e.:

01 10 100

Answer: Display number with leading zeros

x = [1, 10, 100] for i in x: print '%02d' % i

results:

01 10 100

Read more information about string formatting using % in the documentation.

Answer: Display number with leading zeros

Here you are:

pr…

How to: Python string formatting: % vs. .format

Python string formatting: % vs. .format

Python 2.6 introduced the str.format() method with a slightly different syntax from the existing % operator. Which is better and for what situations?

The following uses each method and has the same outcome, so what is the difference?

#!/usr/bin/python sub1 = "python string!" sub2 = "an arg" a = "i am a %s" % sub1 b = "i am a {0}".format(sub1) c = "with…