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Python: Checking if a 'Dictionary' is empty doesn't seem to work
...sing the first way only though. The other two ways are way too wordy.
test_dict = {}
if not test_dict:
print "Dict is Empty"
if not bool(test_dict):
print "Dict is Empty"
if len(test_dict) == 0:
print "Dict is Empty"
...
Watch multiple $scope attributes
...bject in scope.
$scope.$watchGroup(
[function () { return _this.$scope.ViewModel.Monitor1Scale; },
function () { return _this.$scope.ViewModel.Monitor2Scale; }],
function (newVal, oldVal, scope)
{
if (newVal != oldVal) {
...
Replace console output in Python
...his is something I am using:
def startProgress(title):
global progress_x
sys.stdout.write(title + ": [" + "-"*40 + "]" + chr(8)*41)
sys.stdout.flush()
progress_x = 0
def progress(x):
global progress_x
x = int(x * 40 // 100)
sys.stdout.write("#" * (x - progress_x))
s...
Grep characters before and after match?
...
3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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...
Convert interface{} to int
...pe and T are both integer or floating point types.
x's type and T are both complex types.
x is an integer or a slice of bytes or runes and T is a string type.
x is a string and T is a slice of bytes or runes.
But
iAreaId := int(val)
is not any of the cases 1.-7.
...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...
QoS 2
恰好一次
PUBLISH → PUBREC → PUBREL → PUBCOMP
金融交易、计费系统
最高
QoS实现示例：
// 设置不同QoS级别发布消息
when Button_PublishQoS0.Click
do
call UrsPahoMqttClient1.Publish "sensor/temperature", "25.6", 0
when ...
Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...JDK压缩包。
一般解压到/user/local/下，形成/usr/local/jdk1.7.0_79/bin这种目录结构。
配置JAVA_HOME环境变量：echo 'export JAVA_HOME=/usr/local/jdk1.7.0_79' >> ~/.bashrc。
3.2 安装Logstash
去官网下载Logstash的压缩包。
一般也解压到/usr/local/下，形成...
Do you need text/javascript specified in your tags?
...he same kind of short-sighted thinking that makes people name their files "_new" and confuses other people for years. Is it the "_new"? Or "_new_new"? Or "_newer"? IMO it's short-sighted.
– Slobaum
Apr 11 '13 at 1:51
...
Do DOM tree elements with ids become global variables?
...rward.
If you're interested I talk about this in more detail on my blog - https://www.tjvantoll.com/2012/07/19/dom-element-references-as-global-variables/.
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How to find out if an item is present in a std::vector?
... no, it should not be a member. See also en.wikipedia.org/wiki/Coupling_%28computer_programming%29
– Sebastian Mach
Feb 4 '13 at 13:54
...