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Get names of all keys in the collection
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You could do this with MapReduce:
mr = db.runCommand({
"mapreduce" : "my_collection",
"map" : function() {
for (var key in this) { emit(key, null); }
},
"reduce" : function(key, stuff) { return null; },
"out": "my_collection" + "_keys"
})
Then run distinct ...
How to detect IE11?
...at you can do if you really want to know it's IE is to detect the Trident/ string in the user agent if navigator.appName returns Netscape, something like (the untested);
function getInternetExplorerVersion()
{
var rv = -1;
if (navigator.appName == 'Microsoft Internet Explorer')
{
...
How to check all checkboxes using jQuery?
... work good but in my app i have one fake check. when i refresh page ctrl+r and click on checkbox checkAll he dont check me all. After that i must check again to be successfull. So i need 2x click on checkAll whay that dont work on single click(one)? I copy paste that code and make function checkAll(...
How to change color of Android ListView separator line?
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You can set this value in a layout xml file using android:divider="#FF0000". If you are changing the colour/drawable, you have to set/reset the height of the divider too.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="w...
SQLite table constraint - unique on multiple columns
I can find syntax "charts" on this on the SQLite website, but no examples and my code is crashing. I have other tables with unique constraints on a single column, but I want to add a constraint to the table on two columns. This is what I have that is causing an SQLiteException with the message "syn...
Redis key naming conventions?
...directly querying for all keys which starts with user: there is a keys command for that. This command should be however used only for debugging purpose since it's O(N) because it's searching through all keys strored in database.
More appropriate solution for this problem is to create dedicated key,...
How to find a text inside SQL Server procedures / triggers?
...t results because there might be a possibility that some stored procedures and/or views are encrypted in which case you'll need to use DAC connection to get the data you need.
I'd recommend using a third party tool such as ApexSQL Search that can deal with encrypted objects easily.
Syscomments sy...
Should I pass an std::function by const-reference?
...ought using const-references where they should be used is common practice (strings and vectors come to mind).
– Sven Adbring
Aug 21 '13 at 19:14
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Get selected option text with JavaScript
... @mplungjan Why don't you comment here that jQuery uses .textContent and .innerText for .text() method operation? It is not by standards, it is totally wrong because it doesn't use .text. Where are the downvotes?
– VisioN
Feb 20 '13 at 10:11
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How do I avoid capturing self in blocks when implementing an API?
I have a working app and I'm working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing self strongly in a block leading to a retain cycle. I've made a simple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "corre...