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Write bytes to file
...e[] b3 = new byte[6];
byte[] b4 = new byte[6];
FileStream f1;
f1 = new FileStream("test.txt", FileMode.Create, FileAccess.Write);
// write the byte array into a new file
f1.Write(b1, 0, 6);
f1.Close();
// read the byte array
f1 = new...
Bootstrap 3 Flush footer to bottom. not fixed
...e fixed height of the footer here */
height: 60px;
background-color: #f5f5f5;
}
for this HTML
<html>
...
<body>
<!-- Begin page content -->
<div class="container">
</div>
...
<footer class="footer">
&...
When saving, how can you check if a field has changed?
... saving instance. Consider this example:
class MyModel(models.Model):
f1 = models.CharField(max_length=1)
def save(self, *args, **kw):
if self.pk is not None:
orig = MyModel.objects.get(pk=self.pk)
if orig.f1 != self.f1:
print 'f1 changed'
...
Undo a merge by pull request?
...at the commit log, you should find something similar to this:
commit b76a5f1f5d3b323679e466a1a1d5f93c8828b269
Merge: 9271e6e a507888
Author: Tim Tom <tim@tom.com>
Date: Mon Apr 29 06:12:38 2013 -0700
Merge pull request #123 from john/foo_and_bar
Add foo and bar
commit a507888e9f...
Convert blob to base64
...he output String doesn't seem to look like base64?
– quarks
Sep 9 '13 at 1:07
1
@xybrek If you pr...
Build error: You must add a reference to System.Runtime
...mbly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</assemblies>
The final web.config tags should look like this:
<compilation debug="true" targetFramework="4.5">
<assemblies>
<add assembly="System.Runtime, Version=4...
What does “coalgebra” mean in the context of programming?
...bly other types. For example, for IntList and IntTree F looks as follows:
F1 T = 1 | (Int × T)
F2 T = Int | (T × T)
We can immediately notice that any algebraic type can be written in this way. Indeed, that is why they are called 'algebraic': they consist of a number of 'sums' (unions) and 'pro...
Best way to serialize an NSData into a hexadeximal string
...93a3b3c3d3e3f404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5d5e5f606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcec...
Find the IP address of the client in an SSH session
...
who | cut -d"(" -f2 |cut -d")" -f1
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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
...type S struct {
4 x int
5 }
6
7 func main() {
8 F1()
9 F2()
10 F3()
11 }
12
13 func F1() *S {
14 s := new(S)
15 return s
16 }
17
18 func F2() *S {
19 s := S{x: 10}
20 return &s
21 }
22
23 func F3() S {
...