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How to forward declare a template class in namespace std?
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Check out this answer (stackoverflow.com/questions/307343/…) and the linked newsgroup discussion.
– Jon Purdy
Oct 7 '10 at 6:49
7
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How do I write a bash script to restart a process if it dies?
I have a python script that'll be checking a queue and performing an action on each item:
8 Answers
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How do I connect to a specific Wi-Fi network in Android programmatically?
...nfiguration();
conf.SSID = "\"" + networkSSID + "\""; // Please note the quotes. String should contain ssid in quotes
Then, for WEP network you need to do this:
conf.wepKeys[0] = "\"" + networkPass + "\"";
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
c...
Return multiple columns from pandas apply()
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If the pd.Series needs an index, you need to supply it with pd.Series(data, index=...). Otherwise you get cryptic errors when you try to assign the result back into the parent dataframe.
– smci
Nov 25 '19 at 11:0...
How do I load my script into the node.js REPL?
... enter the REPL even if stdin
node -e 'var client = require("./build/main/index.js"); console.log("Use `client` in repl")' -i
Then you can add to package.json scripts
"repl": "node -e 'var client = require(\"./build/main/index.js\"); console.log(\"Use `client` in repl\")' -i",
tested using nod...
How update the _id of one MongoDB Document?
... A fun issue with this appears if some field on that document has a unique index. In that situation, your example will fail because a document cannot be inserted with a duplicate value in a unique indexed field. You could fix this by doing the delete first, but that is a bad idea because if your i...
How do I decode HTML entities in Swift?
...hod starts here =====
var result = ""
var position = startIndex
// Find the next '&' and copy the characters preceding it to `result`:
while let ampRange = self[position...].range(of: "&") {
result.append(contentsOf: self[position ..< ampRange...
How do I specify local .gem files in my Gemfile?
...tem:
Just put your .gem files in a local directory, then use "gem generate_index" to make it a Gem repository
mkdir repo
mkdir repo/gems
cp *.gem repo/gems
cd repo
gem generate_index
Finally point bundler to this location by adding the following line to your Gemfile
source "file://path/to/repo"
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What is the __DynamicallyInvokable attribute for?
Looking through System.Linq.Enumerable in DotPeek I notice that some methods are flavoured with a [__DynamicallyInvokable] attribute.
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IN vs OR in the SQL WHERE Clause
... is faster.
I tried both on a MySQL with 1000000 rows. When the column is indexed there is no discernable difference in performance - both are nearly instant. When the column is not indexed I got these results:
SELECT COUNT(*) FROM t_inner WHERE val IN (1000, 2000, 3000, 4000, 5000, 6000, 7000, 80...