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Return index of greatest value in an array
...it’s reliable and works on old browsers:
function indexOfMax(arr) {
if (arr.length === 0) {
return -1;
}
var max = arr[0];
var maxIndex = 0;
for (var i = 1; i < arr.length; i++) {
if (arr[i] > max) {
maxIndex = i;
max = arr[i];
...
Convert String[] to comma separated string in java
...
if (name.length > 0) {
StringBuilder nameBuilder = new StringBuilder();
for (String n : name) {
nameBuilder.append("'").append(n.replace("'", "\\'")).append("',");
// can also do the following
...
Can one do a for each loop in java in reverse order?
...rary iterable, you'd have to read it all and then "replay" it backwards.
(If you're not already using it, I'd thoroughly recommend you have a look at the Guava. It's great stuff.)
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Can't execute jar- file: “no main manifest attribute”
...ond, to make a jar executable... you need to jar a file called META-INF/MANIFEST.MF
the file itself should have (at least) this one liner:
Main-Class: com.mypackage.MyClass
Where com.mypackage.MyClass is the class holding the public static void main(String[] args) entry point.
Note that there are s...
How to log source file name and line number in Python
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Sure, check formatters in logging docs. Specifically the lineno and pathname variables.
%(pathname)s Full pathname of the source file where the logging call was issued(if available).
%(filename)s Filename portion of pathname.
%(module)s Module (name portion of fi...
How to get line count of a large file cheaply in Python?
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num_lines = sum(1 for line in open('myfile.txt') if line.rstrip()) for filter empty lines
– Honghe.Wu
Mar 3 '14 at 9:26
62
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What is the use of the pipe symbol in YAML?
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The pipe symbol at the end of a line in YAML signifies that any indented text that follows should be interpreted as a multi-line scalar value. See the YAML spec.
Specifically, the pipe indicates that (except for the indentation) the scalar value should be interpreted lite...
Typescript: difference between String and string
Does anyone know the difference between String and string in TypeScript? Am I correct in assuming that they ought to be the same?
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Why don't C++ compilers define operator== and operator!=?
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-1. Of course you want a deep comparison, if the programmer wanted a pointer comparison, he'd write (&f1 == &f2)
– Viktor Sehr
Sep 1 '10 at 9:07
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How to quit a java app from within the program
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The "0" lets whomever called your program know that everything went OK. If, however, you are quitting due to an error, you should System.exit(1);, or with another non-zero number corresponding to the specific error.
Also, as others have mentioned, clean up first! That involves closing files and ...