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Common elements comparison between 2 lists
...der, whereas the list comprehension method preserves the order. Important if anyone needs to consider this. Thanks.
– agftrading
Oct 1 '18 at 15:35
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Diff output from two programs without temporary files
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Use <(command) to pass one command's output to another program as if it were a file name. Bash pipes the program's output to a pipe and passes a file name like /dev/fd/63 to the outer command.
diff <(./a) <(./b)
Similarly you can use >(command) if you want to pipe something into...
Import CSV to mysql table
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Do you know if there is a way to set file path to csv file?
– JasonDavis
Dec 23 '15 at 4:03
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How to check internet access on Android? InetAddress never times out
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- does not work on some old devices (Galays S3, etc.), it blocks a while if no internet is available.
B) Connect to a Socket on the Internet (advanced)
// TCP/HTTP/DNS (depending on the port, 53=DNS, 80=HTTP, etc.)
public boolean isOnline() {
try {
int timeoutMs = 1500;
Socke...
How to decide font color in white or black depending on background color?
...ine the overall intensity of the color and choose the corresponding text.
if (red*0.299 + green*0.587 + blue*0.114) > 186 use #000000 else use #ffffff
The threshold of 186 is based on theory, but can be adjusted to taste. Based on the comments below a threshold of 150 may work better for you.
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Limit the length of a string with AngularJS
...on () {
return function (value, wordwise, max, tail) {
if (!value) return '';
max = parseInt(max, 10);
if (!max) return value;
if (value.length <= max) return value;
value = value.substr(0, max);
if (wordwise) {
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Enter triggers button click
...lt;input type="submit"> . The buttons appear on the page in that order. If I'm in a text field anywhere in the form and press <Enter> , the button element's click event is triggered. I assume that's because the button element sits first.
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Why the switch statement cannot be applied on strings?
...ered by the history of the compiler. At the time they wrote it, C was glorified assembly and hence switch really was a convenient branch table.
– JaredPar
Mar 16 '09 at 13:34
121
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What is the Scala annotation to ensure a tail recursive function is optimized?
...unction. Do you just put it in front of the declaration? Does it also work if Scala is used in scripting mode (for instance using :load <file> under REPL)?
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Java: Get first item from a collection
If I have a collection, such as Collection<String> strs , how can I get the first item out? I could just call an Iterator , take its first next() , then throw the Iterator away. Is there a less wasteful way to do it?
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