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How to count items in JSON object using command line?
...in the mix...
Try jq, a lightweight and flexible command-line JSON processor:
jq length /tmp/test.json
Prints the length of the array of objects.
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Require returns an empty object
...this case, book.js). It (book.js) will load and run the second module (author.js) when it (book.js) requires the other (author.js)
When the second module (author.js) is loaded and run, it (author.js) requires the first module (book.js) but it (author.js) will receive a partially filled object - howe...
What is the Linux equivalent to DOS pause?
...ntinue..." key
[...]
user@host:~$
The -n1 specifies that it only waits for a single character. The -r puts it into raw mode, which is necessary because otherwise, if you press something like backslash, it doesn't register until you hit the next key. The -p specifies the prompt, which must be quo...
Intercept page exit event
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Similar to Ghommey's answer, but this also supports old versions of IE and Firefox.
window.onbeforeunload = function (e) {
var message = "Your confirmation message goes here.",
e = e || window.event;
// For IE and Firefox
if (e) {
e.returnValue = message;
}...
Why does Internet Explorer not send HTTP post body on Ajax call after failure?
...I will provide my empirical data as a substitute and provide some ways to work around it. Maybe some MS insider will one day shed some light on this...
If HTTP Keep-Alive is disabled on the server, this issue goes away. In other words, your HTTP 1.1 server will respond to every Ajax request with a...
What's the difference between findAndModify and update in MongoDB?
... method in MongoDB. What's the advantage of it over the update method? For me, it seems that it just returns the item first and then updates it. But why do I need to return the item first? I read the MongoDB: the definitive guide and it says that it is handy for manipulating queues and performi...
How to use a wildcard in the classpath to add multiple jars? [duplicate]
...) that my CLASSPATH is completely messed up as i have to include the path for every single jar file that i use.
4 Answers
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How to get an enum value from a string value in Java?
...time and do not appear in source code. They do appear in Javadoc, though; for example, Dialog.ModalityType shows both methods.
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PostgreSQL Connection URL
How is the PostgreSQL connection URL formed, when the host is some other computer than the localhost?
6 Answers
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Can I install the “app store” in an IOS simulator?
The IOS simulator in my computer doesn't have app store. I want to use the app store to test a program I wrote on my simulator.
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