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How to prevent rm from reporting that a file was not found?
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--f is valid for GNU Coreutils rm, but only because it happens to be a unique abbreviation for --force. The short form -f is clearer and more portable.
– Keith Thompson
May 28 '14 at 18:09
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When does invoking a member function on a null instance result in undefined behavior?
...unction () {
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}
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Convert RGB to RGBA over white
...:
Basically, you have three numbers x, y, z and you are looking for three new numbers x', y', z' and a multiplier a in the range [0,1] such that:
x = a + (1 - a) x'
y = a + (1 - a) y'
z = a + (1 - a) z'
This is written in units where the channels also take values in the range [0,1]. In 8bit disc...
Sort an array in Java
...are also very useful to learn about, esp When using arrays,
int[] array = new int[10];
Random rand = new Random();
for (int i = 0; i < array.length; i++)
array[i] = rand.nextInt(100) + 1;
Arrays.sort(array);
System.out.println(Arrays.toString(array));
// in reverse order
for (int i = array.l...
Converting JSON data to Java object
... "}]"
+ "}";
// Now do the magic.
Data data = new Gson().fromJson(json, Data.class);
// Show it.
System.out.println(data);
}
}
class Data {
private String title;
private Long id;
private Boolean children;
private List<Data> gr...
What is the difference between YAML and JSON?
... will find C libraries for both JSON and YAML. YAML's libraries tend to be newer, but I have had no trouble with them in the past. See for example Yaml-cpp.
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improve this answer
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How to return a file using Web API?
...romID(id, out fileName, out fileSize);
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new StreamContent(new FileStream(localFilePath, FileMode.Open, FileAccess.Read));
response.Content.Headers.ContentDisposition = new System.Net.Http.Header...
Generate unique random numbers between 1 and 100
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Modern JS Solution using Set (and average case O(n))
const nums = new Set();
while(nums.size !== 8) {
nums.add(Math.floor(Math.random() * 100) + 1);
}
console.log([...nums]);
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How to easily initialize a list of Tuples?
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c# 7.0 lets you do this:
var tupleList = new List<(int, string)>
{
(1, "cow"),
(5, "chickens"),
(1, "airplane")
};
If you don't need a List, but just an array, you can do:
var tupleList = new(int, string)[]
{
(1, "cow"),
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Can I use assert on Android devices?
...0, v1, 0016 // +0008
00038c: 2201 0c00 |0010: new-instance v1, Ljava/lang/AssertionError; // class@000c
000390: 7010 0b00 0100 |0012: invoke-direct {v1}, Ljava/lang/AssertionError;.:()V // method@000b
000396: 2701 ...