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How can I generate random alphanumeric strings?
...
1750
I heard LINQ is the new black, so here's my attempt using LINQ:
private static Random random = ...
Convert a byte array to integer in Java and vice versa
...rticular, the ByteBuffer. It can do all the work for you.
byte[] arr = { 0x00, 0x01 };
ByteBuffer wrapped = ByteBuffer.wrap(arr); // big-endian by default
short num = wrapped.getShort(); // 1
ByteBuffer dbuf = ByteBuffer.allocate(2);
dbuf.putShort(num);
byte[] bytes = dbuf.array(); // { 0, 1 }
...
Using sed and grep/egrep to search and replace
I am using egrep -R followed by a regular expression containing about 10 unions, so like:
.jpg | .png | .gif etc. This works well, now I would like to replace all strings found with .bmp
...
How can I make a div stick to the top of the screen once it's been scrolled to?
...ositioning your element as fixed:
.fixedElement {
background-color: #c0c0c0;
position:fixed;
top:0;
width:100%;
z-index:100;
}
Edit: You should have the element with position absolute, once the scroll offset has reached the element, it should be changed to fixed, and the top p...
postgresql COUNT(DISTINCT …) very slow
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40
holy queries batman! This sped up my postgres count distinct from 190s to 4.5 whoa!
– rogerdpack
Nov ...
The simplest way to resize an UIImage?
...Phone app, I take a picture with the camera, then I want to resize it to 290*390 pixels. I was using this method to resize the image :
...
C# equivalent to Java's charAt()?
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201
You can index into a string in C# like an array, and you get the character at that index.
Exam...
JPush 极光推送扩展 · App Inventor 2 中文网
...Hour, endHour, days)
设置允许推送的时间段。startHour/endHour: 0-23; days: 允许推送的星期（1=周日, 2=周一, …, 7=周六），如 [2,3,4,5,6] 表示工作日
SetSilenceTime(startHour, startMinute, endHour, endMinute)
设置静默时间段，此时间段内不会弹出通...
Following git-flow how should you handle a hotfix of an earlier release?
...e.
This thread has more information, with these examples:
git checkout 6.0
git checkout -b support/6.x
git checkout -b hotfix/6.0.1
... make your fix, then:
git checkout support/6.x
git merge hotfix/6.0.1
git branch -d hotfix/6.0.1
git tag 6.0.1
or using git flow commands
git flow support st...
Python Matplotlib figure title overlaps axes label when using twiny
...tlib, but at least for 1.3.1, this is simply:
plt.title(figure_title, y=1.08)
This also works for plt.suptitle(), but not (yet) for plt.xlabel(), etc.
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