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In Firebase, is there a way to get the number of children of a node without loading all the node dat
...way to count children without loading data, but we do plan to add it.
For now, one solution would be to maintain a counter of the number of children and update it every time you add a new child. You could use a transaction to count items, like in this code tracking upvodes:
var upvotesRef = new Fi...
Callback functions in C++
...t a[5] = {1, 2, 3, 4, 5};
tranform_every_int(&a[0], 5, double_int);
// now a == {2, 4, 6, 8, 10};
tranform_every_int(&a[0], 5, square_int);
// now a == {4, 16, 36, 64, 100};
2. Pointer to member function
A pointer to member function (of some class C) is a special type of (and even more co...
Get the current time in C
...
I know it's probably a bit late and you have likely figured it out by now, but you would use the strptime function in time.h to convert from char * to struct tm
– KingRadical
Nov 5 '13 at 1...
offsetting an html anchor to adjust for fixed header [duplicate]
...on! It seems not to work with IE7. Anyway, I plan to ignore IE7 users from now on...
– user334639
Sep 19 '13 at 15:35
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Writing files in Node.js
... he wanted to save the file on /home directory I suggested to chmod it. I know it could generate a security issue. But well, if the user wants to save there, that's the solution. P.S: I agree with what you said (:
– Denys Vitali
Jan 29 '14 at 22:51
...
How to define a two-dimensional array?
...w, h = 8, 5;
Matrix = [[0 for x in range(w)] for y in range(h)]
You can now add items to the list:
Matrix[0][0] = 1
Matrix[6][0] = 3 # error! range...
Matrix[0][6] = 3 # valid
Note that the matrix is "y" address major, in other words, the "y index" comes before the "x index".
print Matrix[0]...
Intellij IDEA: Hotkey for “scroll from source”
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There is a plugin for this now. See new answer.
– mmm
Nov 6 '15 at 12:15
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Can I tell the Chrome script debugger to ignore jquery.js?
...
Blackboxing JS files is now possible in Firefox
https://developer.mozilla.org/en-US/docs/Tools/Debugger
And in Chrome Canary using Experimental Dev tools.
http://www.divshot.com/blog/tips-and-tricks/ignoring-library-code-while-debugging-in-chrome/
...
Using tags in the with other HTML
...re-proof your HTML by including the scoped attribute
Understand that as of now, the stylesheet within the <body> will not actually be scoped (because no mainstream browser support exists yet)
* except of course, for pissing off HTML validators...
Finally, regarding the common (but subje...
What is a patch in git version control?
...TS)
See also Contributing to Rails with Git as another concrete example.
Nowadays, the GitHub pull request makes it really easy to apply patches on GitHub repos, which is useful when you aren't a direct contributor (ie you have no right to directly push to a repo).
Actually, fairly recently GitHub...