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Drop a temporary table if it exists
...
You could also consider truncating the table instead rather than dropping and recreating.
IF OBJECT_ID('tempdb..##CLIENTS_KEYWORD', 'U') IS NOT NULL
TRUNCATE TABLE ##CLIENTS_KEYWORD
ELSE
CREATE TABLE ##CLIENTS_KEYWORD
(
client_id INT
)
...
Error: Jump to case label
...the same issue but using a goto instead of a switch:
int main() {
if(rand() % 2) // Toss a coin
goto end;
int i = 42;
end:
// We either skipped the declaration of i or not,
// but either way the variable i exists here, because
// variable scopes are resolved at compi...
Regex to replace everything except numbers and a decimal point
...
This is great to convert already-formatted numbers like money to a computable float.
– lu1s
Jan 12 '17 at 0:15
add a ...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
文章源自：https://www.gandalf.site/2018/11/ble_26.html
商业级的Ellisys BEX400侦听工具最为符合对BLE流量捕获及分析的要求，然而售价过于昂贵；
其次，作为开源硬件且配有混杂模式追踪的“超牙”设备——Ubertooth One拥有二次开发和嗅...
Why do I need to override the equals and hashCode methods in Java?
...n conjunction with all hash-based collections, including HashMap, HashSet, and Hashtable.
Let's try to understand it with an example of what would happen if we override equals() without overriding hashCode() and attempt to use a Map.
Say we have a class like this and that two objects of MyClass are...
What is JavaScript's highest integer value that a number can go to without losing precision?
...
JavaScript has two number types: Number and BigInt.
The most frequently-used number type, Number, is a 64-bit floating point IEEE 754 number.
The largest exact integral value of this type is Number.MAX_SAFE_INTEGER, which is:
253-1, or
+/- 9,007,199,254,740,...
iPhone: How to get current milliseconds?
...
I've been using this method for a while and came to realise it can return an earlier value when you call it after couple of miliseconds (e.g. call it consecutively and you might not end up with an increasing sequence)
– Ege Akpinar
...
How can I make an entire HTML form “readonly”?
...ion depending on how complicated your form is. You should read this post:
Convert HTML forms to read-only (Update: broken post link, archived link)
EDIT: Based on your update, why are you so worried about having it read-only? You can do it via client-side but if not you will have to add the requi...
Reverse engineering from an APK file to a project
...an unknown APK file.
Download dex2jar tool from dex2jar.
Use the tool to convert the APK file to JAR:
$ d2j-dex2jar.bat demo.apk
dex2jar demo.apk -> ./demo-dex2jar.jar
Once the JAR file is generated, use JD-GUI to open the JAR file. You will see the Java files.
The output will be similar to...
Turn a string into a valid filename?
...code is the following.
def slugify(value):
"""
Normalizes string, converts to lowercase, removes non-alpha characters,
and converts spaces to hyphens.
"""
import unicodedata
value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore')
value = unicode(re.sub('[^...