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Check that Field Exists with MongoDB
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answered Nov 8 '13 at 20:34
Sergio TulentsevSergio Tulentsev
203k3636 gold badges337337 silver badges336336 bronze badges
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Change SQLite database mode to read-write
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edited Jun 1 '18 at 9:20
answered Oct 5 '09 at 8:06
Aar...
How to commit changes to a new branch
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283
git checkout -b your-new-branch
git add <files>
git commit -m <message>
First, ...
Undefined behavior and sequence points
...lowing expressions after the evaluation of the first expression (§1.9/18) 2
a && b (§5.14)
a || b (§5.15)
a ? b : c (§5.16)
a , b (§5.18) (here a , b is a comma operator; in func(a,a++) , is not a comma operator, it's merely a separator between the arguments a and a++. Thus the behav...
Conversion of System.Array to List
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Save yourself some pain...
using System.Linq;
int[] ints = new [] { 10, 20, 10, 34, 113 };
List<int> lst = ints.OfType<int>().ToList(); // this isn't going to be fast.
Can also just...
List<int> lst = new List<int> { 10, 20, 10, 34, 113 };
or...
List<int> lst ...
Convert javascript array to string
... array, such code will work fine:
var value = { "aaa": "111", "bbb": "222", "ccc": "333" };
var blkstr = [];
$.each(value, function(idx2,val2) {
var str = idx2 + ":" + val2;
blkstr.push(str);
});
console.log(blkstr.join(", "));
<script src="https://ajax.googlea...
How to terminate a window in tmux?
...g black
set -g pane-active-border-fg black
set -g default-terminal "screen-256color"
# Window options
setw -g monitor-activity off
setw -g automatic-rename off
# Colors
setw -g window-status-current-fg colour191
set -g status-bg default
set -g status-fg white
set -g message-bg default
set -g messa...
Set default CRAN mirror permanent in R
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121
You can set repos in your .Rprofile to restore your choice every time you start R
Edit: to be ...
List of Java class file format major version numbers?
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answered Feb 7 '12 at 4:05
MichaelMichael
5,02311 gold badge1717 silver badges2121 bronze badges
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iPad Safari scrolling causes HTML elements to disappear and reappear with a delay
... fairly successful most of the time.
Hat tip: https://web.archive.org/web/20131005175118/http://cantina.co/2012/03/06/ios-5-native-scrolling-grins-and-gothcas/
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